Upload
others
View
20
Download
0
Embed Size (px)
Citation preview
Worm Gear Pair
Catalog Number of Stock Gears
The Catalog Number for KHK stock gears is based on the simple formula listed below. Please order KHK gears by specifying the Catalog Numbers.
Worm Gear Pair
Feature IconsRoHS Compliant Product
Stainless Product
Re-machinableProduct
Resin Product
Finished Product Copper Alloy Product
Heat Treated ProductInjection Molded Product
Ground GearBlack Oxide coated Products
(Example)
KKWGDL • KKWGDLSDuplex Worms
m1.5~4 Page 516
KKWGGround Worm Shafts
m0.5~6 Page 522
KAGDLDuplex Worm Wheels
m1.5~4 Page 516
Reduction Ratio 20~60
KAGWorm Wheels
m0.5~1.5 Page 522
Reduction Ratio 10~60
KAGFWorm Wheels
m2~6 Page 526
Reduction Ratio 10~60
KSWGGround Worms
m1~6 Page 532
Series
KAGWorm Wheels
m1~6 Page 532
Reduction Ratio 10~60
KBGBronze Worm Wheels
m0.5~6 Page 540
Reduction Ratio 10~60
KSWSteel Worms
m0.5~6 Page 540
Series
KCGGray Iron Worm Wheels
m1~6 Page 542
Reduction Ratio 10~120
KDGPlastic Worm Wheels
m0.5, 0.8 Page 556
Reduction Ratio 10~60
KPGPlastic Worm Wheels
m1~3 Page 558
Reduction Ratio 10~50
KSUWStainless Steel Worms
m0.5~3 Page 556
Series
Worms
K W G DL 2 - R1 K
K
Hand thread & Number ofStarts (Right hand, Single thread)Module (2)
Type (Duplex Worm)
Others (Ground Gear)
Type ( Worm)
Material (SCM440)
Material Type
K SCM440 W WormsS S45C DL Duplex WormsSU SUS303 Other Information
G Ground GearsS Worm Shafts
Material Type
A CAC702(*AℓBC2) G Worm WheelsB CAC502(*PBC2) GDL Duplex Worm WheelsC FC200D Polyacetal * ( ) indicates old JIS designation
P MC901
Worm Wheels
A G 1.5 - 20 R2Hand thread & Number of starts(Right hand, Double thread)
Number of teeth (20)
Module (1.5)
Type (Worm Wheel)
Material (CAC702)
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
507
Characteristics
Worm Gear Pair
(NOTE 1) The material of cast hubs for KAGF and KAG worm wheels is FC200(Cast Iron). KAG worm wheels mate primarily with KSWG worms. But, for Modules 0.8 or smaller, KAG worm wheels mate with KKWG worms.
(NOTE 2) KHK stock worms and worm wheels are produced to KHK’s own precision grades. See the “Precision of Worms and Worm Wheels” in the “Selection Hints” section.
Worm Grinding Machine by Klingelnberg Worm gear testing machine by Klingelnberg
Our precision gear cutting technology enables acceleration and noise reductionSetting the proper tooth contact and the backlash is essential for using worm gears. Use KHK stock worm gears for safe, reliable use.
The simplest way to obtain a large speed reduction with high torque in a compact space is with worm gear drives. KHK stock worms and worm wheels are available in modules 0.5 to 6 and in speed ratios of 1/10 to 1/120, made in a variety of materials and styles. We also offer stock duplex worms and worm wheels with which you can obtain a very low backlash, high rotational precision system. The following table lists the main features for easy selection.
Type Catalog No. Module No. of threadsor reduction ratio
Material ( ) JIS
Heattreatment
Tooth surface finish
Precision KHK W 001KHK W 002NOTE 2
Features
Duplex Worms & Worm Wheels
Worm KKWGDL 2~4Single thread
SCM440Thermal refined, gear teeth induc-tion hardened
Ground 1 High-precision duplex worms with superior strength. A range of backlash values can be obtained by moving the worm axially.
Worm KKWGDLS 1.5~4Single thread
SCM440Thermal refined, gear teeth induc-tion hardened
Ground 1Duplex worms with a shaft, excellent in accuracy and strength. A range of backlash values can be obtained by moving the worm axially.
Worm Wheel KAGDL 1.5~4 20~60
CAC702(AℓBC2)
— Cut 1 Duplex worm wheels made of aluminum bronze, excellent in wear-resistance. The pitch accuracy is first grade.
Worm
s & W
orm W
heels
Worm KKWG 0.5~6Single thread - Double thread
SCM440Thermal refined, gear teeth induc-tion hardened
Ground 2Grounded finished worms with a shaft, including tooth surface quenching treatment. Allows compact design due to having small reference diameters.
Worm Wheel KAG NOTE 1 0.5~1.5 10~60
CAC702(AℓBC2)
— Cut 2 Made of aluminum bronze, have excellent wear-resistance. Wide selection is available for this item.
Worm Wheel KAGF NOTE 1 2~6 10~60
CAC702(AℓBC2)
— Cut 2 Made of aluminum bronze, have excellent wear-resistance. Allows compact design.
Worm KSWG 1~6Single thread - Triple thread
S45CGear teeth induction hardened
Ground 2 Reasonably priced ground worms. Ready-to-use finished products from the J Series, are also available.
Worm Wheel KAG NOTE 1 1~6 10~60
CAC702(AℓBC2)
— Cut 2 Made of aluminum bronze, have excellent wear-resistance. Wide selection is available for this item.
Worm KSW 0.5~6Single thread - Double thread
S45C —Cut
(Thread rolled)
4Economical, commonly used worms that have broad utility. Ready-to-use finished products from the J Series are also available.
Worm KSUW 0.5~3Single thread - Double thread
SUS303 — Cut 4Rust-resistant worms made of stainless steel suitable for mating with KDS or KPG worm wheels. Finished products for the J Series are also available.
Worm Wheel KBG 0.5~6 10~60
CAC502(PBC2)
— Cut 4Phosphorous bronze worm wheels have excellent wear resistance. Interchangeable with CG Worm Wheels, and enhances strength.
Worm Wheel KCG 1~6 10~120 FC200 — Cut 4
Economical, commonly used worm wheels that have broad utility. Available with a large selection of modules and number of teeth.
Worm Wheel KDG 0.5~0.8 10~60 Polyacetal — Cut 5 Fine pitch worm wheels made of polyacetal, a stable
plastic material.
Worm Wheel KPG 1~3 10~50 MC901 — Cut 5
Light weight and strong MC Nylon worm wheels. Suitable for use in food machinery, and can be used without lubricant.
508
KHK Technical Information
The efficiency of power transmission varies somewhat with the conditions of assembly and lubricant, but is generally 30~90% (excludes losses from bearings and churning of lu-bricants). The efficiency of KHK stock worm gear pair is given below as a reference. To learn more about strength calcula-tion, please refer to the technical information contained in the “Surface Durability of Cylindrical Worm Gearing” section on Page 96.
1. Efficiency of Worm Gear Pair
Worm rpm
Catalog No.100 300 600 900 1200 1800
KKWG0.5-R1 30 34 38 41 43 46
KKWG0.8-R1 35 40 44 47 49 53
KKWG1-R1 34 40 45 48 51 54
KKWG1.5-R1 35 42 47 51 53 57
KKWG2-R1 45 51 56 60 62 65
KKWG2.5-R1 44 51 57 61 62 67
KKWG3-R1 44 52 58 61 64 67
KKWG4-R1 50 58 64 66 70 72
KKWG5-R1 51 60 66 69 71 73
KKWG6-R1 53 61 66 70 72 75
KKWG0.5-R2 46 50 54 58 60 63
KKWG0.8-R2 51 56 61 64 66 69
KKWG1-R2 51 56 62 64 67 70
KKWG1.5-R2 52 59 64 67 69 73
KKWG2-R2 61 67 71 74 76 78
KKWG2.5-R2 60 67 72 75 76 80
KKWG3-R2 61 68 73 75 78 80
KKWG4-R2 66 73 77 79 82 84
Worm rpm
Catalog No.100 300 600 900 1200 1800
KSWG1-R1 34 40 45 48 51 54
KSWG1.5-R1 35 42 47 51 53 57
KSWG2-R1 38 45 51 55 56 61
KSWG2.5-R1 40 48 54 57 60 63
KSWG3-R1 41 49 55 58 62 65
KSWG4-R1 42 51 56 61 63 67
KSWG5-R1 46 54 60 64 66 70
KSWG6-R1 48 57 64 66 68 73
KSWG1-R2 51 56 62 64 67 70
KSWG1.5-R2 52 59 64 67 69 73
KSWG2-R2 55 62 67 70 72 75
KSWG2.5-R2 57 64 69 72 75 77
KSWG3-R2 58 66 71 73 76 78
KSWG4-R2 59 67 72 75 77 80
KSWG5-R2 62 70 75 78 79 82
KSWG6-R2 65 72 77 80 81 84
KSWG3-R3 67 74 78 80 82 84
KSWG4-R3 68 75 79 82 83 86
Efficiency of KWGDLS/KAGDL Worm Gear Pair ( %)(rpm = Rotation of worm)
Efficiency of KWG/AG, AGF Worm Gear Pair ( %)(rpm = Rotation of worm)
Efficiency of KSWG/KAG Worm Gear Pair ( %)(rpm = Rotation of worm)
Self-locking is defined as the inability of worm wheels to drive the worms. Factors affecting the self-locking feature include the materials of the worm and worm wheel, lead angle, precision of manufacture, types of bearings, lubricant, etc. Thus, it is not de-pendent simply on the lead angle. But, in general, self-locking will occur when the lead angle in a single thread worm is less than 4
。.
For systems requiring fail-safe prevention of back drive, we rec-ommend other braking mechanisms or one-way clutches.
2. Self-Locking Feature of Worm Gear Pair
Efficiency of KSW, KSUM / KCG, KBG, KPG Worm Gear Pair ( %)The efficiency is approximately as follows, depending on the assembly, loading, lubrication and rotational speed.
Catalog No. Thread Efficiency(%)
KSW/KSUWSingle thread 40~50%
Double thread 50~60%
Worm rpm
Catalog No.100 300 600 900 1200 1800
KKWGDL1.5-R1 35 42 47 51 53 57
KKWGDL2-R1 38 45 51 55 56 61
KKWGDL2.5-R1 40 48 54 57 60 63
KKWGDL3-R1 41 49 55 58 62 65
KKWGDL3.5-R1 42 50 56 61 62 65
KKWGDL4-R1 42 51 56 61 63 67
509
Worm Gear Pair
Please select the most suitable products by carefully considering the characteristics of items and contents of the product tables. It is also important to read all applicable “CAUTION” notes shown below before the final selection. Use of catalog numbers when order-ing will simplify and expedite the processing of your order.
Selection Hints
Worms and worm wheels have either right-hand or left-hand helix. The same hand worms and worm wheels comprise sets. However, the number of threads and whether they use normal module or axial module system must also be matched. The table below shows available combi-nations of KHK stock worms and worm wheels.
1. Caution in Selecting the Mating Gears
Worm KKWGDL KKWGDLS KKWG KSWG KSW KSUW
Mating Worm Wheel NOTE 1Helix/
Thread R1 R1 R2 R1 R2 R3 R1 R2 L1 L2 R1 R2
KAGDL R1
KAG0.5~1.5KAGF
R1 R2
KAGR1 R2 R3
KBG
R1 R2 L1 L2
KCG
R1 R2 L1 L2
KPG R1 R2
KDG R1 R2
Mating Worm Wheels Selection Chart
(NOTE 1) Select the same module for both members.
The gear strength values shown in the product pages were compute by assuming a certain application environment as shown below. Therefore, they should be used as reference only. We recommend that each user computes their own values by applying the actual usage conditions.
2. Caution in Selecting Gears Based on Gear Strength
Catalog No.
Item
KKWGDL KKWGDLS/KAGDL
KKWG/KAGF, KSWG/KAGKSW/KBG KSW/KCG KSUW/KPG KSUW/KDG
Formula NOTE 2 Formula of worm gear's strength (JGMA405-01) The Lewis formulaRotations of worm 600rpm 100rpm Allowable bending stress(kgf/mm2)Lubricant Lubricant for gears with proper viscosity and with anti-pressure additives
1.15(40OC with NoLubrication)
NOTE 3
1(40OC with NoLubrication)
Lubrication Oil bathStarting condition Starting torque less than 200% of rated torque. Less than 2 starts per hourDurability 26000 hoursImpact from motor Uniform loadImpact from load Uniform loadAllowable stress factor Sclim 0.67 0.70 0.42
Calculation assumptions for Bending Strength Calculation assumptions for Surface Durability
(NOTE 2)The gear strength formula is based on JGMA (Japanese Gear Manufacturer’s Association) specifications and “MC Nylon Technical Data” by Nippon Polypenco Limited. The units for the rotational speed (rpm) and the stress (kgf/mm2) are adjusted to the units needed in the formula.
(NOTE 3)Allowable bending stress of KDG worm wheel is the value we estimated.
RH single thread LH single thread
RH double thread LH double thread
The Helixes of Worms and Worm Wheels
The Maximum Allowable Sliding Speed Due to HeatCatalog No. Max. Sliding Speed (m/s)
KAGDL 15KAGF 15KAG 15KBG 10KCG 2.5KPG 1 (no lubrication)
*****
The maximum allowable sliding speed for each series of worm wheels is given on the right. Select the appropriate part by calculating the sliding speed.
Sliding speed νs (m/s)
νs =dn
19100 cos γ
d : Worm pitch dia.n : Worm speed (rpm)γ : Worm nominal lead angle * JGMA405-01510
KHK Technical Information
The precision standards of KHK stock worms and worm wheels are established by us. The table below indicates the tolerance ranges for our products.
3. Selecting Worms and Worm Wheels by Precision
KHK established allowable profile and lead errors of worms with precision grades 1 to 4, by using the JIS Standard as reference. Lead errors are measured over one full revolution.
Grade Error
Module
over m0.4up to1
over m1up to 1.6
over m1.6up to 2.5
over m2.5up to 4
over m4up to 6
1Tooth profile error 8 12 16 20 25Lead error 7 9 11 13 16
2Tooth profile error 12 16 20 24 29Lead error 15 18 21 25 28
3Tooth profile erro 16 23 30 37 50Lead error 20 23 27 33 37
4Tooth profile error 20 30 40 50 70Lead error 30 32 38 46 52
Precision Grades of Worm Wheels (KHK W 002)
We have established standard grades 1 to 5 of worm wheels using the JIS Standard as reference. The allowable values of Single Pitch Error and Runout Error are defined for each module size and pitch diameter.
Unit : μm
Grade Error
Over m0.4 up to 1 Over m1 up to 1.6 Over m1.6 up to 2.5 Over m2.5 up to 4 Over m4 up to 6Pitch diameter (mm)
6 up to 12
12 up to 25
25 up to 50
50 up to 100
100 up to 200
12 up to 25
25 up to 50
50 up to 100
100 up to 200
200 up to 400
12 up to 25
25 up to 50
50 up to 100
100 up to 200
200 up to 400
25 up to 50
50 up to 100
100 up to 200
200 up to 400
400 up to 800
25 up to 50
50 up to 100
100 up to 200
200 up to 400
400 up to 800
1Single pitch error 5 6 7 7 9 6 7 8 9 10 7 7 8 9 11 8 9 10 11 13 9 10 11 13 14
Total composite error 21 24 26 30 34 25 28 31 35 41 27 30 33 37 43 33 36 40 46 53 37 40 45 50 57
2Single pitch error 8 8 9 10 12 9 10 11 12 14 9 10 12 13 15 11 13 14 16 18 13 14 16 18 20
Total composite error 30 33 37 42 48 35 39 44 50 57 38 42 46 52 60 46 51 57 64 74 52 57 63 71 80
3Single pitch error 11 12 13 15 17 12 14 16 18 20 13 15 16 19 21 16 18 20 23 26 19 20 22 25 29
Total composite error 43 47 53 60 68 50 55 62 71 81 53 59 66 74 85 65 72 81 91 105 74 81 90 100 115
4Single pitch error 15 17 19 21 24 18 19 22 25 29 19 21 23 26 30 23 25 28 32 37 26 28 32 35 40
Total composite error 60 66 74 83 95 70 77 87 99 115 75 83 92 105 120 91 100 115 130 145 105 115 125 140 160
5Single pitch error 21 24 26 30 34 25 28 31 35 41 27 30 33 37 43 33 36 40 46 53 37 40 45 50 57
Total composite error 86 94 105 120 135 100 110 125 140 165 105 120 130 150 170 130 145 160 185 210 150 160 180 200 230
Overall Length Tolerance of Worms
a Precision of worms (KHK W 001)
b Precision of worm wheels (KHK W 002)
c Overall Length Tolerance of Worms
Precision Grades of Worms (KHK W 001) (Unit: μm)
Series Total length(mm) Tolerance
KKWGDL Uniform 0-0.10
KSWGKSWKSUW
Less than 100 0-0.15
Over 100 0-0.20
KKWGDLSKKWG Uniform Normal tolerance
Overall Length Tolerance of Worms Wheels
Total length (mm) Tolerance
below 30 0-0.10
over 30 up to 100 0-0.15
over 100 0-0.20
(CAUTION) KPG Plastic Wheels are excluded.
511
a If you are reboring, it is important to pay special attention to locating the center in order to avoid runout. (Fig.1) The reference datum for gear cutting or grinding is the bore. (For worm shafts, it is ground portion of the shaft.) Therefore, use the bore or shaft for locating the center. If it is too difficult to do for small bores, the alternative is to use one spot on the bore and the runout of the side surface.
b To open up the bore to its maximum, calculate the bore size so that the tooth strength is weaker than the strength of the remaining material.
For machining the maximum bore diameter, it should be designed so that the thickness between hub diameter (or root diameter) to bore diameter has more strength than the gear strength. As a guide, the maximum machined bore diameter should be within 60% to 70% of the hub diameter (or root diameter). When the keyway is processed, it should be 50% to 60%. In the case FC material is used, it should be lower by 10% or more.
c Since worm wheels are molded products, they may have air bubbles inside the material. In case you find air bubbles inside when performing secondary operations, and if the bubbles are found to be troublesome, please contact your KHK distributor.
Worm Gear Pair
Application Hints
QTC METRIC GEARS PHONE: (516) 437-6700 FAX: (516) 328-3343 E-mail [email protected]
1. Caution on Performing Secondary Operations
If chucking operation using scroll chucks is to be done, we recommend the use of new or rebored jaws for improved precision.
Fig.1
2. Points of Caution in Assembling
Lathe Operation
a KHK stock worms and worm wheels are designed such that when assembled according to the specified Mounting distance with a tol-erance of H7 to H8, the backlash shown in the product tables is obtained. Do not attempt to eliminate backlash by pushing worms into worm wheels or operate with the worm shifted in the direc-tion along the tooth.
b The figure below shows the datum clamp face of a worm wheel. When assembling worm gears, be sure that the worm axis is in the center of the worm wheel face width.
c Because of the helix of the gear teeth, worms and worm wheels produce axial thrust forces. The directions of thrust depend on the hand of the helix and the direction of rotation. This is illustrated be-low in Fig.2. The bearings must be selected properly to be able to handle these thrust forces. See the “Gear Forces” section in the technical reference for more details (Page 107).
d Because large thrust forces act on worms, if they are not se-cured to the shaft firmly, they tend to shift. Use of step shafts, set screws, dowel pins, etc., are recommended. Also, check for loos-ening of bearings due to thrust forces.
In order to use KHK stock worms and worm wheels safely, care-fully read the Application Hints before proceeding. If there are questions or you require clarifications, please contact our techni-cal department or your nearest distributor.
AA
A
R helical
Driver Thrust bearing
Thrust bearing
Driver
Driver Driver
L helical
Fig.2
Direction of rotation and thrust force
Hub - one side Hub - both sides Ring geometry
Datum Clamp Face
512
KHK Technical Information
3. Verifying the orientation of assembly
KSW Worms and KBG Worm Wheels used in adjusting a cloth feeding deviceKSW Worms and KCG Worm Wheels used in a rotating comb device
Application Examples
• Verify that the worm axis is perpendicular to the worm wheel axis.
• Check that the worm axis is in the center of the worm wheel face width.
• Check the Mounting distance (allowable Mounting distance H7~H8). • Confirm that the center of the worm wheel goes through the midpoint of the worm length.
BadGood Good
RH LH
Bad
Error Error
RH LH
ErrorError Error
Error
The worm cannot rotate correctly if the worm wheel is engaged close to either end of its length.
BadGood BadGood
How well the worms and worm wheels are assembled has large effects on the friction of the unit. The tooth contact at the time of assembly must be checked for correctness as shown below. See the “Tooth Contact of a Worm Gear Pair” section in the techni-cal reference for more details (Page 67).
513
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
514
Duplex Worm GearsKKWGDL • KKWGDLS & KAGDL
Description of duplex worm gearsThe usual method of adjusting the backlash of a worm gear assembly
is to modify the center distance. Once assembled, such adjustment
requires a major rework of the gearbox housing. The use of duplex
worm gears allows the backlash adjustment to be made by axially
shifting the worm. This simplifies greatly the assembly and mainte-
nance operations. Because of the unique characteristics of the prod-
uct, please take time to study its construction and proper use.
Backlash adjustment mechanism and method of adjustment
(CAUTION)The amount of change in backlash (。j mm) in relation to the axial movement of the duplex worm shaft (V mm) can be calculated from the formula below.
Wherema = Nominal Axial Module - (0.01× Nominal Axial Module)
mb = Nominal Axial Module + (0.01× Nominal Axial Module)
Δ j=2Vmb-ma
ma+mb
(CAUTION) The KHK duplex worm is designed so that, for all modules, the backlash reduces by 0.02 mm when the worm is shifted 1 mm.
Fig.1
Application Examples
Adjustment by using Screws * Adjustment by using Shims *
Fig. 2
Adjusting Screw Adjusting Shim
The dual-lead worm is formed to give a difference between the right tooth surface and left
tooth surface so that it provides a unique tooth profile in which the tooth thickness varies
continuously, corresponding with the lead difference. (Fig.1)
The worm gear is also formed in its right and left tooth surface.
When such a worm and worm gear are set up at a constant assembly distance and the
worm is moved in the axial direction, the tooth thickness of the worm in mesh with the
worm gear changes making backlash adjustment possible.
An arrow marking on the outer circumference of the hub of the KHK duplex worm indicates the direction of assembly as well as acts as a guide for the backlash adjustment.When the worm is held with arrow mark pointing right, the tooth thickness is thinner on the right and thicker on the left. Therefore, moving the worm to the right causes the thicker teeth to come into actual engagement with the worm gear, thereby reducing the backlash. (Fig.2)(a tooth surface pitch) (b tooth surface pitch)
b tooth surface a tooth surface
(Nom
inal s
urfa
ce)
Reference toothMoving the worm in the direction of the arrow causes the backlash to decrease.
* The illustration above is a design example, not a design for machinery or a device in actual use.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
515
Arrow mark indicates the correct orientation of two gears when assembled. As shown, the two arrows must point in the same direction.
Point of caution during assemblyKHK duplex worm gears differs in module between the right and left
tooth surface and, therefore, you must orient the worm and worm wheel
properly. Please carefully verify the following two aspects before proceed-
ing with assembly.
1. Verifying the orientation of assembly An arrow indicating the orientation of assembly is stamped on both the duplex worm and worm wheel. When assembling the
worm and worm wheel, check the worm wheel of the arrow mark on the front such that the direction of arrow mark on the worm coincides with that on the worm wheel. Should the assembly be incorrect, the center distance “a” will become larger than the normal distance, resulting in difficulty of assembly and improper gear engagement. (Fig.3)
2. Verifying the reference position
A V-groove (60°, 0.3 mm deep line) on tip peripheral of the duplex worm tooth marks the reference tooth. The gear set is designated to
have a backlash of nearly zero (±0.045) when the reference tooth is positioned in alignment with the center of rotation of the worm wheel
with the center distance set at the value "a". (Fig.4)
Fig. 3
Fig. 4
Reference toothReference tooth
Cen
ter d
ista
nce
Duplex Worm Gears
KKWGDL • KKWGDLS & KAGDL
Cen
ter d
ista
nce
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
516
Duplex WormsModule 1.5, 2KKWGDL • KKWGDLS
Duplex Worm WheelsModule 1.5, 2KAGDL
R
M
P Q
L N O
S
Vmax
G GG
G
G
G
W4
Catalog No.Nominal axial
moduleNumber of
startsNominal
lead angleHand thread Shape
Bore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length
LH7 M N O P Q RKKWGDL2-R1 m2 1 3°41' R W4 14 25 31 35 36 14 50
Catalog No.Nominal axial
moduleNumber of
startsNominal
lead angleHand thread Shape
Total length Shaft length (L) Neck length (L) Face width Neck length (R) Shaft length (R) Pitch dia.
J K L M N O PKKWGDLS1.5-R1 m1.5 1 3°26' R W6 190 66 12 28 18 66 25KKWGDLS2-R1 m2 1 3°41' R W6 220 75 13 36 21 75 31
Catalog No.Reduction
ratioNominal axial
moduleNo. of teeth
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width
AH7 B C D D' E F
KAGDL1.5-20R1KAGDL1.5-30R1KAGDL1.5-36R1KAGDL1.5-40R1KAGDL1.5-50R1KAGDL1.5-60R1
203036405060
m1.5
203036405060
3°26'3°26'3°26'3°26'3°26'3°26'
RRRRRR
H1H1H1H1H1H1
81010121212
223035354550
304554607590
334857637893
34.549.558.564.579.594.5
141414141414
101010101010
KAGDL2-20R1KAGDL2-30R1KAGDL2-36R1KAGDL2-40R1KAGDL2-50R1KAGDL2-60R1
203036405060
m2
203036405060
3°41'3°41'3°41'3°41'3°41'3°41'
RRRRRR
H1H1H1H1H1H1
121515151515
334045455060
40607280
100120
44647684
104124
46667886
106126
181818181818
151515151515
GE F
J
A B DC D’
H1
[Caution on Product Characteristics] a When the center distance is moved to reduce the backlash, the V max is the maximum amount of distance that you may shift without causing problems with the gear mesh. The V max is not a recommended value to use for adjustment when assembling.
b These worms produce axial thrust forces. See page 512 for more details.
[Caution on Product Characteristics] a The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
b Duplex worms and worm wheels must be mated in a predetermined orientation, which is indicated by the arrows. Therefore, the arrow on the wheel does not indicate the mounting direction, but the rotating direction. Please refer to the Application Hints on page 515.
Specifications
Precision grade KHK W 002 grade 1
Referencesection of gear Rotating plane
Gear teeth Standard full depth
Normalpressure angle 17° 30'
Material CAC702 (formerly JIS AℓBC2)
Heat treatment —
Tooth hardness —
Specifications
Precision grade KHK W 001 grade 1
Referencesection of gear Axial
Gear teeth Standard full depth
Normalpressure angle 17° 30'
Material SCM440
Heat treatment Thermal refined, tooth surfaceinduction hardened
Tooth hardness 50~60HRC
For products not categorized in our Stock Gear series', custom gear production services with short lead times is available. For details see page VI.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
517
JML N OK
T
S R P Q S
Vmax
G G G G
W6
Position ofreference tooth Max. allowable shift Weight
(kg)Catalog No.
S Vmax22 8 0.21 KKWGDL2-R1
Outside dia. Neck dia. Shaft dia. Position ofreference tooth Max. allowable shift Weight
(kg)Catalog No.
Q R S T Vmax28 21 26.2 17 6 0.74 KKWGDLS1.5-R135 24 30.2 22 8 1.17 KKWGDLS2-R1
Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm 1800 rpm
242424242424
——————
——————
27.53539.542.55057.5
9.8420.829.335.653.875.3
8.1817.524.630.045.463.8
6.4013.919.824.236.951.9
5.3011.716.820.631.644.7
4.6810.414.918.328.340.4
4.259.40
13.516.625.836.7
3.688.28
11.914.622.632.4
0±0.0450±0.0450±0.0450±0.0450±0.0450±0.045
0.10 0.22 0.320.37 0.59 0.83
KAGDL1.5-20R1KAGDL1.5-30R1KAGDL1.5-36R1KAGDL1.5-40R1KAGDL1.5-50R1KAGDL1.5-60R1
333333333333
——————
——————
35.545.551.555.565.575.5
21.044.362.375.8
115160
17.537.352.664.096.8
136
13.629.642.051.478.4
110
11.224.835.543.666.994.6
9.8421.931.338.559.584.9
8.9419.828.434.954.277.2
7.7517.425.030.747.668.1
0±0.0450±0.0450±0.0450±0.0450±0.0450±0.045
0.260.510.730.861.301.88
KAGDL2-20R1KAGDL2-30R1KAGDL2-36R1KAGDL2-40R1KAGDL2-50R1KAGDL2-60R1
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when per-forming modifications and/or secondary operations for safety concerns.
b Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 1 to 2 mm).
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
Duplex Worms
KKWGDL • KKWGDLS
Duplex Worm Wheels
KAGDL
NOTE 1 : Allowable torque for worm revolution (rpm)
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
518
Duplex WormsModule 2.5, 3KKWGDL • KKWGDLS
Duplex Worm WheelsModule 2.5, 3KAGDL
GE F
J
A B DC D’
H1
R
M
P Q
L N O
S
Vmax
G GG
G
G
G
W4
Catalog No.Nominal axial
moduleNumber of
startsNominal
lead angleHand thread Shape
Bore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length
LH7 M N O P Q RKKWGDL2.5-R1 m2.5 1 3°52' R W4 18 30 37 42 48 17 65KKWGDL3-R1 m3 1 3°54' R W4 20 35 44 50 54 20 74
Catalog No.Nominal axial
moduleNumber of
startsNominal
lead angleHand thread Shape
Total length Shaft length (L) Neck length (L) Face width Neck length (R) Shaft length (R) Pitch dia.
J K L M N O PKKWGDLS2.5-R1 m2.5 1 3°52' R W6 260 85 16 48 26 85 37KKWGDLS3-R1 m3 1 3°54' R W6 300 100 18 54 28 100 44
Catalog No.Reduction
ratioNominal axial
moduleNo. of teeth
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width
AH7 B C D D' E F
KAGDL2.5-20R1KAGDL2.5-30R1KAGDL2.5-36R1KAGDL2.5-40R1KAGDL2.5-50R1KAGDL2.5-60R1
203036405060
m2.5
203036405060
3°52'3°52'3°52'3°52'3°52'3°52'
RRRRRR
H1H1H1HBHBHB
151515151515
404045456080
507590
100125150
558095
105130155
57.582.597.5
107.5132.5157.5
222222222222
151515151515
KAGDL3-20R1KAGDL3-30R1KAGDL3-36R1KAGDL3-40R1KAGDL3-50R1KAGDL3-60R1
203036405060
m3
203036405060
3°54'3°54'3°54'3°54'3°54'3°54'
RRRRRR
H1H1H1HBHBHB
202020202020
505560607080
6090
108120150180
6696
114126156186
6999
117129159189
282828282828
171717171717
[Caution on Product Characteristics] a When the center distance is moved to reduce the backlash, the V max is the maximum amount of distance that you may shift without causing problems with the gear mesh. The V max is not a recommended value to use for adjustment when assembling.
b These worms produce axial thrust forces. See page 512 for more details.
[Caution on Product Characteristics] a The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
b Duplex worms and worm wheels must be mated in a predetermined orientation, which is indicated by the arrows. Therefore, the arrow on the wheel does not indicate the mounting direction, but the rotating direction. Please refer to the Application Hints on page 515.
Specifications
Precision grade KHK W 002 grade 1
Referencesection of gear Rotating plane
Gear teeth Standard full depth
Normalpressure angle 17° 30'
Material CAC702 (formerly JIS AℓBC2)
Heat treatment —
Tooth hardness —
Specifications
Precision grade KHK W 001 grade 1
Referencesection of gear Axial
Gear teeth Standard full depth
Normalpressure angle 17° 30'
Material SCM440
Heat treatment Thermal refined, tooth surfaceinduction hardened
Tooth hardness 50~60HRC
For products not categorized in our Stock Gear series', custom gear production services with short lead times is available. For details see page VI.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
519
JML N OK
T
S R P Q S
Vmax
G G G G
W6
Position ofreference tooth Max. allowable shift Weight
(kg)Catalog No.
S Vmax29 10 0.37 KWGDL2.5-R132 10 0.61 KWGDL3-R1
Outside dia. Neck dia. Shaft dia. Position ofreference tooth Max. allowable shift Weight
(kg)Catalog No.
Q R S T Vmax42 30 36.2 29 10 2.00 KWGDLS2.5-R150 34 40.2 32 10 2.95 KWGDLS3-R1
A B C D D’
( I )
J
GE F
(H)
CS
CS
HB*CS has a sand mold casting finish.
[Caution on Secondary Operations]
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
Duplex Worms
KKWGDL • KKWGDLS
Duplex Worm Wheels
KAGDL
Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm 1800 rpm
373737373737
———
(10)(12)(12)
———(86)
(108)(133)
43.55663.568.58193.5
38.180.5
113138208291
31.467.194.5
115174245
24.553.175.592.4
141198
20.144.563.878.3
120170
17.639.156.068.8
106152
16.035.551.062.797.3
139
13.830.944.354.484.3
121
0±0.0450±0.0450±0.0450±0.0450±0.0450±0.045
0.450.881.251.141.932.90
KAGDL2.5-20R1KAGDL2.5-30R1KAGDL2.5-36R1KAGDL2.5-40R1KAGDL2.5-50R1KAGDL2.5-60R1
454545454545
———
(14)(14)(14)
———
(106)(134)(164)
5267768297
112
65.0137193235355497
53.3114160195295415
41.590.0
128157239336
33.874.7
107131202285
29.565.593.8
115178254
26.959.585.6
105163233
22.851.273.490.1
140200
0±0.0450±0.0450±0.0450±0.0450±0.0450±0.045
0.811.652.322.193.264.48
KAGDL3-20R1KAGDL3-30R1KAGDL3-36R1KAGDL3-40R1KAGDL3-50R1KAGDL3-60R1
NOTE 1 : Allowable torque for worm revolution (rpm)
a Please read “Caution on Performing Secondary Operations” (Page 512) when per-forming modifications and/or secondary operations for safety concerns.
b Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 1 to 2 mm).
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
520
Duplex WormsModule 3.5, 4KKWGDL • KKWGDLS
Duplex Worm WheelsModule 3.5, 4KAGDL
R
M
P Q
L N O
S
Vmax
G GG
G
G
G
W4
Catalog No.Nominal axial
moduleNumber of
startsNominal
lead angleHand thread Shape
Bore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length
LH7 M N O P Q RKKWGDL3.5-R1 m3.5 1 3°47' R W4 24 44 53 60 62 23 85KKWGDL4-R1 m4 1 3°41' R W4 28 50 62 70 74 26 100
Catalog No.Nominal axial
moduleNumber of
startsNominal
lead angleHand thread Shape
Total length Shaft length (L) Neck length (L) Face width Neck length (R) Shaft length (R) Pitch dia.
J K L M N O PKKWGDLS3.5-R1 m3.5 1 3°47' R W6 330 110 18 62 30 110 53KKWGDLS4-R1 m4 1 3°41' R W6 360 120 16 74 30 120 62
Catalog No.Reduction
ratioNominal axial
moduleNo. of teeth
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width
AH7 B C D D' E F
KAGDL3.5-20R1KAGDL3.5-30R1KAGDL3.5-36R1KAGDL3.5-40R1KAGDL3.5-50R1KAGDL3.5-60R1
203036405060
m3.5
203036405060
3°47'3°47'3°47'3°47'3°47'3°47'
RRRRRR
H1H1H1HBHBHB
202020202020
556070708090
70105126140175210
77112133147182217
80.5115.5136.5150.5185.5220.5
323232323232
181818181818
KAGDL4-20R1KAGDL4-30R1KAGDL4-36R1KAGDL4-40R1KAGDL4-50R1KAGDL4-60R1
203036405060
m4
203036405060
3°41'3°41'3°41'3°41'3°41'3°41'
RRRRRR
H1HBHBHBHBH5
202020202030
6065757590
120
80120144160200240
88128152168208248
92132156172212252
353535353535
202020202020
GE F
J
A B DC D’
H1
[Caution on Product Characteristics] a When the center distance is moved to reduce the backlash, the V max is the maximum amount of distance that you may shift without causing problems with the gear mesh. The V max is not a recommended value to use for adjustment when assembling.
b These worms produce axial thrust forces. See page 512 for more details.
[Caution on Product Characteristics] a The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
b Duplex worms and worm wheels must be mated in a predetermined orientation, which is indicated by the arrows. Therefore, the arrow on the wheel does not indicate the mounting direction, but the rotating direction. Please refer to the Application Hints on page 515.
*H5 shape have a hub made from S45C cast iron.
Specifications
Precision grade KHK W 002 grade 1
Referencesection of gear Rotating plane
Gear teeth Standard full depth
Normalpressure angle 17° 30'
Material CAC702 (formerly JIS AℓBC2)*
Heat treatment —
Tooth hardness —
Specifications
Precision grade KHK W 001 grade 1
Referencesection of gear Axial
Gear teeth Standard full depth
Normalpressure angle 17° 30'
Material SCM440
Heat treatment Thermal refined, tooth surfaceinduction hardened
Tooth hardness 50~60HRC
For products not categorized in our Stock Gear series', custom gear production services with short lead times is available. For details see page VI.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
521
JML N OK
T
S R P Q S
Vmax
G G G G
W6
Position ofreference tooth Max. allowable shift Weight
(kg)Catalog No.
S Vmax37 12 1.05 KKWGDL3.5-R144 14 1.67 KKWGDL4-R1
Outside dia. Neck dia. Shaft dia. Position ofreference tooth Max. allowable shift Weight
(kg)Catalog No.
Q R S T Vmax60 42 48.2 37 12 4.72 KKWGDLS3.5-R170 50 56.2 44 14 7.10 KKWGDLS4-R1
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
b Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 1 to 2 mm).
*CS has a sand mold casting finish.
Duplex Worms
KWGDL • KWGDLS
Duplex Worm Wheels
A B C D D’
( I )
J
GE F
(H)
CS
CS
HB
( I )
J
A B C D D’
GE F
(H)
H5
KAGDL
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm 1800 rpm
505050505050
———
(15)(16)(16)
———
(124)(155)(189)
61.57989.596.5
114131.5
98.5208293356538753
80.4172242295446627
62.5136193236360506
50.4111160196301425
44.298.1
141173267381
40.088.3
127156243345
33.775.7
109133207296
0±0.0450±0.0450±0.0450±0.0450±0.0450±0.045
1.242.513.613.345.026.87
KAGDL3.5-20R1KAGDL3.5-30R1KAGDL3.5-36R1KAGDL3.5-40R1KAGDL3.5-50R1KAGDL3.5-60R1
555555555555
—(17)(17)(17)(17)(17)
—(99)
(121)(137)(177)(200)
7191
103111131151
134284400486735
1030
109234329400605851
84.8184262320488687
67.9150215264405572
59.7132190233361515
53.4118170208324461
44.8101144177275393
0±0.0450±0.0450±0.0450±0.0450±0.0450±0.045
1.763.014.184.787.07
11.5
KAGDL4-20R1KAGDL4-30R1KAGDL4-36R1KAGDL4-40R1KAGDL4-50R1KAGDL4-60R1
NOTE 1 : Allowable torque for worm revolution (rpm)
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
522
Ground Worm ShaftsModule 0.5, 0.8KKWG
Worm WheelsModule 0.5, 0.8KAG
JMK O
P QS S
G G GG
W5
Catalog No.Axial
moduleNumber of
startsLead angle Hand thread Shape
Total length Shaft length (L) Neck length (L) Face width Neck length (R) Shaft length (R) Pitch dia.
J K L M N O P
KKWG0.5-R1KKWG0.5-R2 m0.5 1
23°11'6°20'
RR
W5W5
6565
1919
——
1212
——
3434
99
KKWG0.8-R1KKWG0.8-R2 m0.8 1
23°49'7°36'
RR
W5W5
8585
2525
——
2020
——
4040
1212
J
GE F
A B C D’
HA
a These worms produce axial thrust forces. See page 512 for more details.
a The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
Catalog No.Reduction
ratioTransverse
moduleNo. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' E
KAG0.5-20R1KAG0.5-20R2KAG0.5-30R1KAG0.5-30R2KAG0.5-40R1
2010301540
m0.5
2020303040
12121
3°11'6°20'3°11'6°20'3°11'
RRRRR
HAHAHAHAHA
44445
99
121215
1010151520
—————
1111161621
55555
KAG0.5-50R1KAG0.5-60R1
5060
5060
11
3°11'3°11'
RR
HAHA
55
2025
2530
——
2631
55
KAG0.8-20R1KAG0.8-20R2KAG0.8-30R1KAG0.8-30R2KAG0.8-40R1
2010301540
m0.8
2020303040
12121
3°49'7°36'3°49'7°36'3°49'
RRRRR
HAHAHAHAHA
55556
1212181820
1616242432
—————
17.617.625.625.633.6
88888
KAG0.8-50R1KAG0.8-60R1
5060
5060
11
3°49'3°49'
RR
HAHA
88
2525
4048
——
41.649.6
88
[Caution on Product Characteristics]
[Caution on Product Characteristics]
Specifications
Precision grade KHK W 002 grade 2
Referencesection of gear Rotating plane
Gear teeth Standard full depth
Normalpressure angle 20°
Material CAC702 (formerly JIS AℓBC2)
Heat treatment —
Tooth hardness —
Specifications
Precision grade KHK W 001 grade 2
Referencesection of gear Axial
Gear teeth Standard full depth
Normalpressure angle 20°
Material SCM440
Heat treatment Thermal refined, tooth surfaceinduction hardened
Tooth hardness 50~60HRC
For products not categorized in our Stock Gear series', custom gear production services with short lead times is available. For details see page VI.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
523
Outside dia. Neck dia. Shaft dia. Weight
(kg)Catalog No.
Q R Sh7
1010
——
66
0.0180.018
KKWG0.5-R1KKWG0.5-R2
13.613.6
——
88
0.0430.043
KKWG0.8-R1KKWG0.8-R2
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or sec-ondary operations for safety concerns.
b Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 1 to 2 mm). Use carbide tools for the modification of the shaft area near the bottom land.
Ground Worm Shafts
KKWG
Worm Wheels
KAGDL
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm 1800 rpm
77777
1212121212
—————
—————
9.59.5
121214.5
0.520.511.091.091.86
0.440.420.940.921.60
0.360.330.770.731.34
0.300.270.650.601.15
0.260.240.580.541.02
0.240.220.530.490.94
0.210.190.480.430.84
0.02~0.140.02~0.140.02~0.140.02~0.140.02~0.14
0.00560.00560.0120.0120.020
KAG0.5-20R1KAG0.5-20R2KAG0.5-30R1KAG0.5-30R2KAG0.5-40R1
77
1212
——
——
1719.5
2.823.94
2.423.41
2.052.89
1.772.50
1.582.26
1.462.08
1.301.87
0.02~0.140.02~0.14
0.0350.053
KAG0.5-50R1KAG0.5-60R1
88888
1616161616
—————
—————
1414181822
1.781.763.773.756.45
1.501.443.213.145.49
1.211.112.622.464.55
1.000.912.202.023.87
0.880.801.961.803.46
0.820.741.811.653.19
0.710.631.611.452.83
0.06~0.170.06~0.170.06~0.170.06~0.170.06~0.17
0.0180.0180.0430.0430.068
KAG0.8-20R1KAG0.8-20R2KAG0.8-30R1KAG0.8-30R2KAG0.8-40R1
88
1616
——
——
2630
9.7513.6
8.3111.7
6.949.77
5.948.39
5.347.63
4.967.05
4.386.27
0.06~0.170.06~0.17
0.100.14
KAG0.8-50R1KAG0.8-60R1
NOTE 1 : Allowable torque for worm revolution (rpm)
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
524
Ground Worm ShaftsModule 1, 1.5KKWG
Worm WheelsModule 1, 1.5KAG
JM NLK O
S R P Q S
GGGG
W6
Catalog No.Axial
moduleNumber of
startsLead angle Hand thread Shape
Total length Shaft length (L) Neck length (L) Face width Neck length (R) Shaft length (R) Pitch dia.
J K L M N O P
KKWG1-R1KKWG1-R2 m1 1
23°35'7°08'
RR
W6W6
140140
3535
1010
3030
1010
5555
1616
KKWG1.5-R1KKWG1.5-R2 m1.5 1
23°26'6°51'
RR
W6W6
190190
5050
1515
4040
1515
7070
2525
GE F
J
A B D’DC
H1
a These worms produce axial thrust forces. See page 512 for more details.
a The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
Catalog No.Reduction
ratioTransverse
moduleNo. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' E
KAG1-20R1KAG1-20R2KAG1-30R1KAG1-30R2KAG1-40R1
2010301540
m1
2020303040
12121
3°35'7°08'3°35'7°08'3°35'
RRRRR
H1H1H1H1H1
66668
1616202026
2020303040
2222323242
2323333343
1010101010
KAG1-50R1KAG1-60R1
5060
5060
11
3°35'3°35'
RR
H1H1
810
3035
5060
5262
5363
1010
KAG1.5-20R1KAG1.5-20R2KAG1.5-30R1KAG1.5-30R2KAG1.5-40R1
2010301540
m1.5
2020303040
12121
3°26'6°51'3°26'6°51'3°26'
RRRRR
H1H1H1H1H1
88
101012
2222303035
3030454560
3333484863
34.534.549.549.564.5
1414141414
KAG1.5-50R1KAG1.5-60R1
5060
5060
11
3°26'3°26'
RR
H1H1
1212
4550
7590
7893
79.594.5
1414
[Caution on Product Characteristics]
[Caution on Product Characteristics]
Specifications
Precision grade KHK W 002 grade 2
Referencesection of gear Rotating plane
Gear teeth Standard full depth
Normalpressure angle 20°
Material CAC702 (formerly JIS AℓBC2)
Heat treatment —
Tooth hardness —
Specifications
Precision grade KHK W 001 grade 2
Referencesection of gear Axial
Gear teeth Standard full depth
Normalpressure angle 20°
Material SCM440
Heat treatment Thermal refined, tooth surfaceinduction hardened
Tooth hardness 50~60HRC
For products not categorized in our Stock Gear series', custom gear production services with short lead times is available. For details see page VI.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
525
Outside dia. Neck dia. Shaft dia. Weight
(kg)Catalog No.
Q R S
1818
1313
18.218.2
0.250.25
KKWG1-R1KKWG1-R2
2828
2121
26.226.2
0.740.74
KKWG1.5-R1KKWG1.5-R2
a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
b Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 1 to 2 mm). Use carbide tools for the modification of the shaft area near the bottom land.
[Caution on Secondary Operations]
Ground Worm Shafts
KKWG
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm 1800 rpm
1010101010
2020202020
—————
—————
1818232328
3.353.317.087.03
12.1
2.792.695.985.84
10.2
2.232.064.844.568.43
1.831.684.053.727.12
1.631.483.633.336.38
1.501.353.313.035.86
1.301.152.922.635.13
0.08~0.190.08~0.190.08~0.190.08~0.190.08~0.19
0.0380.0380.0780.0780.13
KAG1-20R1KAG1-20R2KAG1-30R1KAG1-30R2KAG1-40R1
1010
2020
——
——
3338
18.325.6
15.521.8
12.918.1
10.915.4
9.8714.1
9.0912.9
7.9511.4
0.08~0.190.08~0.19
0.200.29
KAG1-50R1KAG1-60R1
1010101010
2424242424
—————
—————
27.5 27.5 353542.5
9.849.72
20.820.735.6
8.187.87
17.517.130.0
6.405.92
13.913.124.2
5.304.87
11.710.820.6
4.684.25
10.49.56
18.3
4.253.839.408.58
16.6
3.683.278.287.46
14.6
0.10~0.210.10~0.210.10~0.210.10~0.210.10~0.21
0.100.100.220.220.37
KAG1.5-20R1KAG1.5-20R2KAG1.5-30R1KAG1.5-30R2KAG1.5-40R1
1010
2424
——
——
5057.5
53.875.3
45.463.8
36.951.9
31.644.7
28.340.4
25.836.7
22.632.4
0.10~0.210.10~0.21
0.590.83
KAG1.5-50R1KAG1.5-60R1
NOTE 1 : Allowable torque for worm revolution (rpm)
Worm Wheels
KAG
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
526
Ground Worm ShaftsModule 2, 2.5KKWG
Worm WheelsModule 2, 2.5KAGF
JM NLK O
S R P Q S
GGGG
W6
Catalog No.Axial
moduleNumber of
startsLead angle Hand thread Shape
Total length Shaft length (L) Neck length (L) Face width Neck length (R) Shaft length (R) Pitch dia.
J K L M N O P
KKWG2-R1KKWG2-R2 m2 1
25°12'
10°18'RR
W6W6
200200
3535
2525
4040
2525
7575
2222
KKWG2.5-R1KKWG2.5-R2 m2.5 1
24°46'9°28'
RR
W6W6
250250
5050
2727
4646
2727
100100
3030
Catalog No.Reduction
ratioTransverse
moduleNo. of teeth
Number of starts
Profile shiftcoefficient
Helix angle
Hand thread
ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width(R)
AH7 B C D D' E FKAGF2-20R1KAGF2-20R2KAGF2-25R1KAGF2-30R1KAGF2-30R2
2010253015 m2
2020253030
12112
−0.5−0.5−0.5−0.5−0.5
5°12'10°18'
5°12'5°12'
10°18'
RRRRR
H6H6H6H6H6
1212121212
3232353838
4040506060
4242526262
4444546464
1818181818
1212121212
KAGF2-36R1KAGF2-40R1KAGF2-48R1KAGF2-50R1KAGF2-60R1
3640485060
3640485060
11111
0−0.5+0.5−0.5−0.5
5°12'5°12'5°12'5°12'5°12'
RRRRR
H6H8H9H9H9
1212121212
4045505050
728096
100120
7682
102102122
7884
104104124
1818181818
1212121212
KAGF2.5-20R1KAGF2.5-20R2KAGF2.5-25R1KAGF2.5-30R1KAGF2.5-30R2
2010253015 m2.5
2020253030
12112
00000
4°46'9°28'4°46'4°46'9°28'
RRRRR
H6H6H6H6H6
1212121212
3535404040
505062.57575
555567.58080
57.557.57082.582.5
2020202020
1515151515
KAGF2.5-36R1KAGF2.5-40R1KAGF2.5-48R1KAGF2.5-50R1KAGF2.5-60R1
3640485060
3640485060
11111
00000
4°46'4°46'4°46'4°46'4°46'
RRRRR
H8H9H9H9H9
1212121212
4545505560
90100120125150
95105125130155
97.5107.5127.5132.5157.5
2020202020
1515151515
GEF’ F
A B C D D’
J
H6
a These worms produce axial thrust forces. See page 512 for more details.[Caution on Product Characteristics]
[Caution on Product Characteristics] a The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
b There may be space in the casting between the two materials, but it will not affect the joint strength.
*H8, H9 shape have a hub made from FC200 cast iron.
Specifications
Precision grade KHK W 002 grade 2
Referencesection of gear Rotating plane
Gear teeth Standard full depth
Normalpressure angle 20°
Material CAC702 (formerly JIS AℓBC2)*
Heat treatment —
Tooth hardness —
Specifications
Precision grade KHK W 001 grade 2
Referencesection of gear Axial
Gear teeth Standard full depth
Normalpressure angle 20°
Material SCM440
Heat treatment Thermal refined, tooth surfaceinduction hardened
Tooth hardness 50~60HRC
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
527
Outside dia. Neck dia. Shaft dia. Weight
(kg)Catalog No.
Q R S
2626
1717
25.225.2
0.640.64
KKWG2-R1KKWG2-R2
3535
2323
30.230.2
1.271.27
KKWG2.5-R1KKWG2.5-R2
a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
b Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 1 to 2 mm). Use carbide tools for the modification of the shaft area near the bottom land.
[Caution on Secondary Operations]
*CS has a sand mold casting finish.
Ground Worm Shafts
KKWG
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
b The tooth and the hub areas, fastened by casting, are designed to have higher hardness than other parts of the gear. However, please avoid areas other than the hub. Also, the strength may decrease if secondary operations are performed.
Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm 1800 rpm
55555
3535353535
—————
—————
3030354040
19.419.929.441.142.3
16.116.124.534.535.0
12.812.219.627.727.0
10.59.99
16.323.222.1
9.308.75
14.420.719.9
8.497.92
13.218.817.7
7.316.74
11.416.415.4
0.11~0.240.11~0.240.11~0.240.11~0.240.11~0.24
0.250.250.370.510.51
KAGF2-20R1KAGF2-20R2KAGF2-25R1KAGF2-30R1KAGF2-30R2
55555
3535353535
——
(10)(12)(12)
——
(76)(81)(96)
4750606070
57.870.398.5
106149
48.659.283.089.5
126
39.348.168.073.4
103
33.240.757.962.588.4
29.636.451.956.280.3
27.033.247.551.573.3
23.628.941.344.964.2
0.11~0.240.11~0.240.11~0.240.11~0.240.11~0.24
0.730.851.141.141.51
KAGF2-36R1KAGF2-40R1KAGF2-48R1KAGF2-50R1KAGF2-60R1
55555
4040404040
—————
—————
404046.2552.552.5
35.134.653.074.173.6
29.027.943.962.060.6
22.620.934.849.146.2
18.617.128.941.237.8
16.314.825.336.733.2
14.813.423.032.829.9
12.811.320.028.725.8
0.14~0.270.14~0.270.14~0.270.14~0.270.14~0.27
0.440.440.660.870.87
KAGF2.5-20R1KAGF2.5-20R2KAGF2.5-25R1KAGF2.5-30R1KAGF2.5-30R2
55555
4040404040
—(12)(13)(13)(13)
—(80)(97)
(100)(125)
60657577.590
104127178192268
87.4106149161226
69.885.4
121130183
59.072.4
103111157
51.863.790.898.4
141
47.157.983.190.0
128
41.250.572.278.3
112
0.14~0.270.14~0.270.14~0.270.14~0.270.14~0.27
1.191.231.721.922.59
KAGF2.5-36R1KAGF2.5-40R1KAGF2.5-48R1KAGF2.5-50R1KAGF2.5-60R1
NOTE 1 : Allowable torque for worm revolution (rpm)
Worm Wheels
J
GE FF’
A B C D D’
H8
( I )
J
A B DC D’
GEF’ F
(H)
CS
CS
H9
KAG
For products not categorized in our Stock Gear series', custom gear production services with short lead times is available. For details see page VI.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
528
Ground Worm ShaftsModule 3, 4KKWG
Worm WheelsModule 3, 4KAGF
JM NLK O
S R P Q S
GGGG
W6
Catalog No.Axial
moduleNumber of
startsLead angle Hand thread Shape
Total length Shaft length (L) Neck length (L) Face width Neck length (R) Shaft length (R) Pitch dia.
J K L M N O P
KKWG3-R1KKWG3-R2 m3 1
24°31'8°58'
RR
W6W6
300300
5555
3030
6060
3030
125125
3838
KKWG4-R1KKWG4-R2 m4 1
25°43'
11°19'RR
W6W6
360360
7070
32.532.5
7575
32.532.5
150150
4040
Catalog No.Reduction
ratioTransverse
moduleNo. of teeth
Number of starts
Profile shiftcoefficient
Helix angle
Hand thread
ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width(R)
AH7 B C D D' E FKAGF3-20R1KAGF3-20R2KAGF3-25R1KAGF3-30R1KAGF3-30R2
2010253015 m3
2020253030
12112
+0.333+0.333
0+0.333+0.333
4°31'8°58'4°31'4°31'8°58'
RRRRR
H6H6H6H8H8
2020202020
5050555555
6060759090
6868819898
717184
101101
2525252525
17.517.517.517.517.5
KAGF3-36R1KAGF3-40R1KAGF3-48R1KAGF3-50R1KAGF3-60R1
3640485060
3640485060
11111
+0.333+0.333+0.333+0.333+0.333
4°31'4°31'4°31'4°31'4°31'
RRRRR
H8H9H9H9H9
2020202020
6065707580
108120144150180
116128152158188
119131155161191
2525252525
17.517.517.517.517.5
KAGF4-20R1KAGF4-20R2KAGF4-25R1KAGF4-30R1KAGF4-30R2
2010253015 m4
2020253030
12112
00000
5°43'11°19'
5°43'5°43'
11°19'
RRRRR
H6H6H6H8H8
2020202020
6060656565
8080
100120120
8888
108128128
9292
112132132
3030303030
2020202020
KAGF4-36R1KAGF4-40R1KAGF4-48R1KAGF4-50R1KAGF4-60R1
3640485060
3640485060
11111
00000
5°43'5°43'5°43'5°43'5°43'
RRRRR
H9H9H9H9H0
20202020
160
70809090—
144160192200240
152168200208248
156172204212252
3030303030
20202020
7
GEF’ F
A B C D D’
J
H6
[Caution on Product Characteristics] a These worms produce axial thrust forces. See page 512 for more details.
[Caution on Product Characteristics] a The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
b There may be space in the casting between the two materials, but it will not affect the joint strength.
*H8, H9 shape have a hub made from FC200 cast iron.
Specifications
Precision grade KHK W 002 grade 2
Referencesection of gear Rotating plane
Gear teeth Standard full depth
Normalpressure angle 20°
Material CAC702 (formerly JIS AℓBC2)*
Heat treatment —
Tooth hardness —
Specifications
Precision grade KHK W 001 grade 2
Referencesection of gear Axial
Gear teeth Standard full depth
Normalpressure angle 20°
Material SCM440
Heat treatment Thermal refined, tooth surfaceinduction hardened
Tooth hardness 50~60HRC
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
529
Outside dia. Neck dia. Shaft dia. Weight
(kg)Catalog No.
Q R S
4444
3030
40.240.2
2.662.66
KKWG3-R1KKWG3-R2
4848
2929
45.245.2
3.853.85
KKWG4-R1KKWG4-R2
*CS has a sand mold casting finish.
Ground Worm Shafts
KKWG
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
b The tooth and the hub areas, fastened by casting, are designed to have higher hardness than other parts of the gear. However, please avoid areas other than the hub. Also, the strength may decrease if secondary operations are performed.
Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm 1800 rpm
7.57.57.57.57.5
5050505050
—————
—————
505056.56565
59.760.290.2
126128
49.148.274.3
105105
38.336.158.883.179.8
31.529.548.969.665.2
27.525.442.661.057.2
25.123.039.055.451.6
21.519.433.548.244.3
0.16~0.290.16~0.290.16~0.290.16~0.290.16~0.29
0.880.881.241.631.63
KAGF3-20R1KAGF3-20R2KAGF3-25R1KAGF3-30R1KAGF3-30R2
7.57.57.57.57.5
5050505050
—(16)(15)(15)(15)
—(95)
(120)(125)(155)
74809295
110
178216303326457
148180252272383
118145204220310
99.7122174188265
87.5108153166237
79.498.0
141152217
69.184.9
121132188
0.16~0.290.16~0.290.16~0.290.16~0.290.16~0.29
2.252.523.283.624.76
KAGF3-36R1KAGF3-40R1KAGF3-48R1KAGF3-50R1KAGF3-60R1
1010101010
6060606060
—————
—————
6060708080
123127186260270
101101153216220
78.876.0
121171168
64.661.9
100143137
56.353.287.3
125120
51.548.379.9
114108
43.840.568.598.492.2
0.19~0.320.19~0.320.19~0.320.19~0.320.19~0.32
1.771.772.563.283.28
KAGF4-20R1KAGF4-20R2KAGF4-25R1KAGF4-30R1KAGF4-30R2
1010101015
6060606030
(20)(23)(20)(20)
8
(113)(128)(160)(168)204
92100116120140
366445624673941
304370519560788
243297420454638
204251356385544
179220314340486
164201288312444
141173248269385
0.19~0.320.19~0.320.19~0.320.19~0.320.19~0.32
4.105.256.957.353.60
KAGF4-36R1KAGF4-40R1KAGF4-48R1KAGF4-50R1KAGF4-60R1
NOTE 1 : Allowable torque for worm revolution (rpm)
a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
b Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 1 to 2 mm). Use carbide tools for the modification of the shaft area near the bottom land.
[Caution on Secondary Operations]
Worm WheelsHEF’
JI A C D D’
F
H0
J
GE FF’
A B C D D’
H8
( I )
J
A B DC D’
GEF’ F
(H)
CS
CS
H9
KAGF
For products not categorized in our Stock Gear series', custom gear production services with short lead times is available. For details see page VI.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
530
Ground Worm ShaftsModule 5, 6KKWG
Specifications
Precision grade KHK W 001 grade 2
Referencesection of gear Axial
Gear teeth Standard full depth
Normalpressure angle 20°
Material SCM440
Heat treatment Thermal refined, tooth surfaceinduction hardened
Tooth hardness 50~60HRC
Worm WheelsModule 5, 6KAGF
JM NLK O
S R P Q S
GGGG
W6
Catalog No. Axial module
Number of starts
Lead angle Hand thread ShapeTotal length Shaft length (L) Neck length (L) Face width Neck length (R) Shaft length (R) Pitch dia.
J K L M N O PKKWG5-R1 m5 1 5°43' R W6 400 75 30 90 30 175 50KKWG6-R1 m6 1 5°43' R W6 400 60 40 100 40 160 60
Catalog No.Reduction
ratioTransverse
moduleNo. of teeth
Number of starts
Profile shiftcoefficient
Helix angle
Hand thread
ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width Hub width(R)
AH7 B C D D' E FKAGF5-20R1KAGF5-25R1KAGF5-30R1KAGF5-36R1KAGF5-40R1
2025303640 m5
2025303640
11111
00000
5°43'5°43'5°43'5°43'5°43'
RRRRR
H6H6H9H9H9
2222222222
75757590
110
100125150180200
110135160190210
115140165195215
3535353535
2323232323
KAGF5-48R1KAGF5-50R1KAGF5-60R1
485060
485060
111
000
5°43'5°43'5°43'
RRR
H0H0H0
140150200
———
240250300
250260310
255265315
353535
7.57.57.5
KAGF6-20R1KAGF6-25R1KAGF6-30R1KAGF6-36R1KAGF6-40R1
2025303640 m6
2025303640
11111
00000
5°43'5°43'5°43'5°43'5°43'
RRRRR
H6H6H9H9H0
25252525
130
8590
100110
—
120150180216240
132162192228252
138168198234258
4040404040
23232323
8KAGF6-48R1KAGF6-50R1KAGF6-60R1
485060
485060
111
000
5°43'5°43'5°43'
RRR
H0H0H0
180190250
———
288300360
300312372
306318378
404040
888
GEF’ F
A B C D D’
J
H6
*H8, H9 shape have a hub made from FC200 cast iron.
[Caution on Product Characteristics] a The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
b There may be space in the casting between the two materials, but it will not affect the joint strength.c For H0-shaped products with a bore size of Ø190 or more, the bore tolerance is H8.
[Caution on Product Characteristics] a These worms produce axial thrust forces. See page 512 for more details.
Specifications
Precision grade KHK W 002 grade 2
Referencesection of gear Rotating plane
Gear teeth Standard full depth
Normalpressure angle 20°
Material CAC702 (formerly JIS AℓBC2)*
Heat treatment —
Tooth hardness —
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
531
Outside dia. Neck dia. Shaft dia. Weight
(kg)Catalog No.
Q R S60 36 50.2 5.75 KKWG5-R172 44 60.2 8.09 KKWG6-R1
HEF’
JI A C D D’
F
H0
( I )
J
A B DC D’
GEF’ F
(H)
CS
CS
H9*CS has a sand mold casting finish.
a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
b The tooth and the hub areas, fastened by casting, are designed to have higher hardness than other parts of the gear. However, please avoid areas other than the hub. Also, the strength may decrease if secondary operations are performed.
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
b Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 1 to 2 mm). Use carbide tools for the modification of the shaft area near the bottom land.
Ground Worm Shafts
KKWG
Worm Wheels
[Caution on Secondary Operations]
Hub width (L) Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F' G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm 1800 rpm
1212121212
7070707070
——
(25)(25)(26)
——
(115)(140)(162)
7587.5
100115125
211319446627763
172261369519632
134206291414506
108168239343421
95.0147211302371
86.2134191274337
72.7114164234288
0.22~0.350.22~0.350.22~0.350.22~0.350.22~0.35
3.264.485.377.709.97
KAGF5-20R1KAGF5-25R1KAGF5-30R1KAGF5-36R1KAGF5-40R1
17.517.517.5
353535
101010
195205255
145150175
107011501610
886956
1340
715772
1090
598646913
530574820
483523744
411446639
0.22~0.350.22~0.350.22~0.35
5.045.286.48
KAGF5-48R1KAGF5-50R1KAGF5-60R1
1212121220
7575757540
——
(30)(30)12
——
(135)(172)190
90105120138150
329497696978
1190
268405572806981
208319451641784
167259368528648
146227325466572
131204290417513
110173248355436
0.24~0.370.24~0.370.24~0.370.24~0.370.24~0.37
4.957.149.21
12.56.20
KAGF6-20R1KAGF6-25R1KAGF6-30R1KAGF6-36R1KAGF6-40R1
202020
404040
121212
240250310
174180210
167018002520
138014802090
111012001680
920994
1410
816885
1260
735796
1130
628676969
0.24~0.370.24~0.370.24~0.37
7.588.00
10.0
KAGF6-48R1KAGF6-50R1KAGF6-60R1
NOTE 1 : Allowable torque for worm revolution (rpm)
KAGF
For products not categorized in our Stock Gear series', custom gear production services with short lead times is available. For details see page VI.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
532
Ground WormsModule 1, 1.5KSWG
Worm WheelsModule 1, 1.5KAG
Catalog No.• : J Series (Available-on-request)
Axialmodule
Number of starts
Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width (R) Hub width (L)
LH7 M N O P Q Q'
KSWG1-R1 KSWG1-R2 m1 1
23°35'7°08'
RR
W2W2
88
——
1616
1818
——
——
——
KSWG1.5-R1
•KSWG1.5-R1J10m1.5
1 3°26' R W1W1K
1010 20 25 28 30 10 —
KSWG1.5-R2•KSWG1.5-R2J10 2 6°51' R W1
W1K1010 20 25 28 30 10 —
RS
N OL
G
W2
GE F
J
A B D’DC
H1
Catalog No.Reduction
ratioTransverse
moduleNo. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' E
KAG1-20R1KAG1-20R2KAG1-30R1KAG1-30R2KAG1-40R1
2010301540
m1
2020303040
12121
3°35'7°08'3°35'7°08'3°35'
RRRRR
H1H1H1H1H1
66668
1616202026
2020303040
2222323242
2323333343
1010101010
KAG1-50R1KAG1-60R1
5060
5060
11
3°35'3°35'
RR
H1H1
810
3035
5060
5262
5363
1010
KAG1.5-20R1KAG1.5-20R2KAG1.5-30R1KAG1.5-30R2KAG1.5-40R1
2010301540
m1.5
2020303040
12121
3°26'6°51'3°26'6°51'3°26'
RRRRR
H1H1H1H1H1
88
101012
2222303035
3030454560
3333484863
34.534.549.549.564.5
1414141414
KAG1.5-50R1KAG1.5-60R1
5060
5060
11
3°26'3°26'
RR
H1H1
1212
4550
7590
7893
79.594.5
1414
[Caution on Product Characteristics] a For W2-shaped products, a set screw is included. When setting up the mating wheel, make sure no friction occurs within the set screw.
b These worms produce axial thrust forces. See page 512 for more details.
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns. b Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 1 to 2 mm).
a The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
[Caution on Product Characteristics]
Specifications
Precision grade KHK W 002 grade 2
Referencesection of gear Rotating plane
Gear teeth Standard full depth
Normalpressure angle 20°
Material CAC702 (formerly JIS AℓBC2)
Heat treatment —
Tooth hardness —
Specifications
Precision grade KHK W 001 grade 2 *
Referencesection of gear Axial
Gear teeth Standard full depth
Normalpressure angle 20°
Material S45C
Heat treatment Teeth induction hardened
Tooth hardness 50~60HRC
* The precision grade of J Series products is equivalent to the value shown in the table.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
533
Total length Keyway Set screw Weight
(kg)Catalog No.
• : J Series (Available-on-request)R Width×Depth Size S
3232
——
M4M4
55
0.0370.037
KSWG1-R1 KSWG1-R2
40 —4 x 1.8
—M4
—5
0.120.11
KSWG1.5-R1•KSWG1.5-R1J10
40 —4 x 1.8
—M4
—5
0.120.11
KSWG1.5-R2•KSWG1.5-R2J10
a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
[Caution on Secondary Operations]
Ground Worms
KSWG
RP Q
L M N O
G
W1
S
RP Q
L M N O
G
W1K
Worm Wheels
KAG
Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm 1800 rpm
1010101010
2020202020
—————
—————
1818232328
3.353.317.087.03
12.1
2.792.695.985.84
10.2
2.232.064.844.568.43
1.831.684.053.727.12
1.631.483.633.336.38
1.501.353.313.035.86
1.301.152.922.635.13
0.08~0.190.08~0.190.08~0.190.08~0.190.08~0.19
0.0380.0380.0780.0780.13
KAG1-20R1KAG1-20R2KAG1-30R1KAG1-30R2KAG1-40R1
1010
2020
——
——
3338
18.325.6
15.521.8
12.918.1
10.915.4
9.8714.1
9.0912.9
7.9511.4
0.08~0.190.08~0.19
0.200.29
KAG1-50R1KAG1-60R1
1010101010
2424242424
—————
—————
27.5 27.5 353542.5
9.849.72
20.820.735.6
8.187.87
17.517.130.0
6.405.92
13.913.124.2
5.304.87
11.710.820.6
4.684.25
10.49.56
18.3
4.253.839.408.58
16.6
3.683.278.287.46
14.6
0.10~0.210.10~0.210.10~0.210.10~0.210.10~0.21
0.100.100.220.220.37
KAG1.5-20R1KAG1.5-20R2KAG1.5-30R1KAG1.5-30R2KAG1.5-40R1
1010
2424
——
——
5057.5
53.875.3
45.463.8
36.951.9
31.644.7
28.340.4
25.836.7
22.632.4
0.10~0.210.10~0.21
0.590.83
KAG1.5-50R1KAG1.5-60R1
NOTE 1 : Allowable torque for worm revolution (rpm)
Series
[Caution on J series] a As available-on-request products, requires a lead-time for shipping within 5 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.b Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.c Keyways are made according to JIS B1301 standards, Js 9 tolerance.d Areas of products which have been re-worked will not be black oxide coated.e For products having a tapped hole, a set screw is included.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
534
Ground WormsModule 2, 2.5KSWG
Worm WheelsModule 2, 2.5KAG
R
P QQ’
L M N O
G
W3
Catalog No.Reduction
ratioTransverse
moduleNo. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' E
KAG2-20R1KAG2-20R2KAG2-30R1KAG2-30R2KAG2-40R1
2010301540
m2
2020303040
12121
3°41'7°21'3°41'7°21'3°41'
RRRRR
H1H1H4H4H4
1212121212
3333404045
4040606080
4444646484
4646666686
1818181818
KAG2-50R1KAG2-60R1
5060
5060
11
3°41'3°41'
RR
H5H5
1212
5055
100120
104124
106126
1818
KAG2.5-20R1KAG2.5-20R2KAG2.5-30R1KAG2.5-30R2KAG2.5-40R1
2010301540
m2.5
2020303040
12121
3°52'7°42'3°52'7°42'3°52'
RRRRR
H1H1H4H4H5
1212121215
3535404045
50507575
100
55558080
105
57.557.582.582.5
107.5
2020202020
KAG2.5-50R1KAG2.5-60R1
5060
5060
11
3°52'3°52'
RR
H5H5
1515
5560
125150
130155
132.5157.5
2020
Catalog No.• : J Series (Available-on-request)
Axialmodule
Number of starts
Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width (R) Hub width (L)
LH7 M N O P Q Q' KSWG2-R1
•KSWG2-R1J12
•KSWG2-R1J14m2
1 3°41' RW3W3KW3K
121214
25 31 35 32 15 3
KSWG2-R2
•KSWG2-R2J12
•KSWG2-R2J142 7°21' R
W3W3KW3K
121214
25 31 35 32 15 3
KSWG2.5-R1
•KSWG2.5-R1J15
•KSWG2.5-R1J16
•KSWG2.5-R1J17m2.5
1 3°52' R
W3W3KW3KW3K
15151617
30 37 42 45 17 3
KSWG2.5-R2
•KSWG2.5-R2J15
•KSWG2.5-R2J16
•KSWG2.5-R2J17
2 7°42' R
W3W3KW3KW3K
15151617
30 37 42 45 17 3
GE F
J
A B D’DC
H1*H8, H9 shape have a hub made from FC200 cast iron.
[Caution on Product Characteristics] a The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
b There may be space in the casting between the two materials, but it will not affect the joint strength.
Specifications
Precision grade KHK W 002 grade 2
Referencesection of gear Rotating plane
Gear teeth Standard full depth
Normalpressure angle 20°
Material CAC702 (formerly JIS AℓBC2)*
Heat treatment —
Tooth hardness —
Specifications
Precision grade KHK W 001 grade 2 *
Referencesection of gear Axial
Gear teeth Standard full depth
Normalpressure angle 20°
Material S45C
Heat treatment Teeth induction hardened
Tooth hardness 50~60HRC
* The precision grade of J Series products is equivalent to the value shown in the table.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
535
Total length Keyway Set screw Weight
(kg)Catalog No.
• : J Series (Available-on-request)R Width×Depth Size S
50—
4 x 1.85 x 2.3
—M4M4
—7.57.5
0.210.210.19
KSWG2-R1
•KSWG2-R1J12
•KSWG2-R1J14
50—
4 x 1.85 x 2.3
—M4M4
—7.57.5
0.210.210.19
KSWG2-R2
•KSWG2-R2J12
•KSWG2-R2J14
65
—5 x 2.35 x 2.35 x 2.3
—M4M4M4
—8.58.58.5
0.400.390.380.37
KSWG2.5-R1
•KSWG2.5-R1J15
•KSWG2.5-R1J16
•KSWG2.5-R1J16
65
—5 x 2.35 x 2.35 x 2.3
—M4M4M4
—8.58.58.5
0.400.390.380.37
KSWG2.5-R2
•KSWG2.5-R2J15
•KSWG2.5-R2J16
•KSWG2.5-R2J17
J
G
B C D D’
E F
A
H4
( I )
J
A B C D D’
GE F
(H)
CS
CS H5
[Caution on Product Characteristics]a These worms produce axial thrust forces. See page 512 for more details.
[Caution on Secondary Operations]a Please read “Caution on Performing Secondary Operations” (Page 512) when per-
forming modifications and/or secondary operations for safety concerns. b Due to the gear teeth being induction hardened, no secondary operations can be
performed on tooth areas including the bottom land (approx. 1 to 2 mm).
Ground Worms
KSWG
Series
R
P QQ’
L M N O
GS
W3K
Worm Wheels
KAG
Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm 1800 rpm
1515151515
3333333333
—————
—————
35.5 35.5 45.5 45.5 55.5
21.020.744.344.075.8
17.516.837.336.564.0
13.612.629.627.851.4
11.210.324.822.843.6
9.848.93
21.920.138.5
8.948.05
19.818.034.9
7.756.89
17.415.730.7
0.11~0.240.11~0.240.11~0.240.11~0.240.11~0.24
0.260.260.510.510.85
KAG2-20R1KAG2-20R2KAG2-30R1KAG2-30R2KAG2-40R1
1515
3333
(8)(11)
(83)(100)
65.5 75.5
115160
96.8136
78.4110
66.994.6
59.584.9
54.277.2
47.668.1
0.11~0.240.11~0.24
1.051.52
KAG2-50R1KAG2-60R1
1414141414
3434343434
————
(11)
————
(81)
43.5 43.5 565668.5
34.634.273.272.7
125
28.527.461.059.6
105
22.320.648.345.584.0
18.316.840.537.271.2
16.014.535.532.662.5
14.613.132.229.457.0
12.511.128.125.349.5
0.14~0.270.14~0.270.14~0.270.14~0.270.14~0.27
0.390.390.790.791.11
KAG2.5-20R1KAG2.5-20R2KAG2.5-30R1KAG2.5-30R2KAG2.5-40R1
1414
3434
(12)(12)
(106)(130)
8193.5
189265
158222
128180
109154
96.7138
88.5126
76.7110
0.14~0.270.14~0.27
1.702.32
KAG2.5-50R1KAG2.5-60R1
NOTE 1 : Allowable torque for worm revolution (rpm)
a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
b The tooth and the hub areas, fastened by casting, are designed to have higher hardness than other parts of the gear. However, please avoid areas other than the hub. Also, the strength may decrease if secondary operations are performed.
[Caution on Secondary Operations]
[Caution on J series]a As available-on-request products, requires a lead-time for shipping within 5 working-days (excludes the
day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.b Number of products we can process for one order is 1 to 20 units. For quantities of 21 or
more pieces, we need to quote price and lead time.c Keyways are made according to JIS B1301 standards, Js 9 tolerance.d Areas of products which have been re-worked will not be black oxide coated.e For products having a tapped hole, a set screw is included.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
536
Ground WormsModule 3, 4KSWG
Specifications
Precision grade KHK W 001 grade 2 *
Referencesection of gear Axial
Gear teeth Standard full depth
Normalpressure angle 20°
Material S45C
Heat treatment Teeth induction hardened
Tooth hardness 50~60HRC
Worm WheelsModule 3, 4
Specifications
Precision grade KHK W 002 grade 2
Referencesection of gear Rotating plane
Gear teeth Standard full depth
Normalpressure angle 20°
Material CAC702 (formerly JIS AℓBC2)*
Heat treatment —
Tooth hardness —
R
P QQ’
L M N O
G
W3
Catalog No.Reduction
ratioTransverse
moduleNo. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' EKAG3-20R1KAG3-20R2KAG3-30R1KAG3-30R2KAG3-30R3
2010301510 m3
2020303030
12123
3°54'7°46'3°54'7°46'
11°34'
RRRRR
H1H1H4H4H4
2020202020
5050555555
6060909090
6666969696
6969999999
2525252525
KAG3-40R1KAG3-45R3KAG3-50R1KAG3-60R1
40155060
40455060
1311
3°54'11°34'
3°54'3°54'
RRRR
H5H5H5H5
20202020
65707585
120135150180
126141156186
129144159189
25252525
KAG4-20R1KAG4-20R2KAG4-30R1KAG4-30R2KAG4-30R3
2010301510 m4
2020303030
12123
3°41'7°21'3°41'7°21'
10°57'
RRRRR
H1H1H4H4H4
2020202020
6060656565
8080
120120120
8888
128128128
9292
132132132
3030303030
KAG4-40R1KAG4-45R3KAG4-50R1KAG4-60R1
40155060
40455060
1311
3°41'10°57'
3°41'3°41'
RRRR
H5H5H5H5
20202020
809090
100
160180200240
168188208248
172192212252
30303030
Catalog No.• : J Series (Available-on-request)
Axialmodule
Number of starts
Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width (R) Hub width (L)
LH7 M N O P Q Q' KSWG3-R1
•KSWG3-R1J17
•KSWG3-R1J18
•KSWG3-R1J19
•KSWG3-R1J20
m3
1 3°54' R
W3W3KW3KW3KW3K
1617181920
35 44 50 50 20 4
KSWG3-R2
•KSWG3-R2J17
•KSWG3-R2J18
•KSWG3-R2J19
•KSWG3-R2J20
2 7°46' R
W3W3KW3KW3KW3K
1617181920
35 44 50 50 20 4
KSWG3-R3
•KSWG3-R3J17
•KSWG3-R3J18
•KSWG3-R3J19
•KSWG3-R3J20
3 11°34' R
W3W3KW3KW3KW3K
1617181920
35 44 50 50 20 4
KSWG4-R1 KSWG4-R2 KSWG4-R3
m4123
3°41'7°21'
10°57'
RRR
W3W3W3
222222
505050
626262
707070
707070
252525
555
[Caution on Product Characteristics] a These worms produce axial thrust forces. See page 512 for more details.
*H8, H9 shape have a hub made from FC200 cast iron.
[Caution on Product Characteristics] a The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
b There may be space in the casting between the two materials, but it will not affect the joint strength.
KAG
GE F
J
A B D’DC
H1
* The precision grade of J Series products is equivalent to the value shown in the table.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
537
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
b The tooth and the hub areas, fastened by casting, are designed to have higher hardness than other parts of the gear. However, please avoid areas other than the hub. Also, the strength may decrease if secondary operations are performed.
Ground Worms
KSWG
R
P QQ’
L M N O
GS
W3K
Series
Total length Keyway Set screw Weight
(kg)Catalog No.
• : J Series (Available-on-request)R Width×Depth Size S
74
—5 x 2.36 x 2.86 x 2.86 x 2.8
—M4M5M5M5
—10101010
0.660.640.620.600.58
KSWG3-R1
•KSWG3-R1J17
•KSWG3-R1J18
•KSWG3-R1J19
•KSWG3-R1J20
74
—5 x 2.36 x 2.86 x 2.86 x 2.8
—M4M5M5M5
—10101010
0.660.640.620.600.58
KSWG3-R2
•KSWG3-R2J17
•KSWG3-R2J18
•KSWG3-R2J19
•KSWG3-R2J20
74
—5 x 2.36 x 2.86 x 2.86 x 2.8
—M4M5M5M5
—10101010
0.660.640.620.600.58
KSWG3-R3
•KSWG3-R3J17
•KSWG3-R3J18
•KSWG3-R3J19
•KSWG3-R3J20100100100
———
———
———
1.821.821.82
KSWG4-R1 KSWG4-R2 KSWG4-R3
Worm Wheels
J
G
B C D D’
E F
A
H4
( I )
J
A B C D D’
GE F
(H)
CS
CS H5
KAG
Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm 1800 rpm
1818181818
4343434343
—————
—————
5252 6767 67
59.558.7
126125129
48.846.9
104.3102103
38.035.182.477.677.1
30.928.468.462.862.4
27.024.559.955.153.8
24.722.254.549.748.7
20.918.546.942.240.6
0.16~0.290.16~0.290.16~0.290.16~0.290.16~0.29
0.750.751.461.461.46
KAG3-20R1KAG3-20R2KAG3-30R1KAG3-30R2KAG3-30R3
18181818
43434343
(10)(11)(15)(15)
(103)(120)(130)(155)
8289.5 97
112
215274325455
179224270380
143171219308
120138185261
106121163233
96.4109150213
82.592.6
128183
0.16~0.290.16~0.290.16~0.290.16~0.29
2.032.443.224.52
KAG3-40R1KAG3-45R3KAG3-50R1KAG3-60R1
2020202020
5050505050
—————
—————
7171919191
115114244242250
93.690.0
200196198
72.767.2
158148147
58.253.5
129118117
51.146.4
114104102
45.741.2
10192.290.2
38.434.186.377.674.7
0.19~0.320.19~0.320.19~0.320.19~0.320.19~0.32
1.531.533.003.003.00
KAG4-20R1KAG4-20R2KAG4-30R1KAG4-30R2KAG4-30R3
20202020
50505050
(15)(16)(16)(17)
(133)(153)(173)(210)
111121131151
417531630881
343430519730
274326418589
226259347491
200229309441
179202277395
152170236337
0.19~0.320.19~0.320.19~0.320.19~0.32
4.325.446.258.74
KAG4-40R1KAG4-45R3KAG4-50R1KAG4-60R1
NOTE 1 : Allowable torque for worm revolution (rpm)
[Caution on J series]a As available-on-request products, requires a lead-time for shipping within 5 working-days (excludes the day ordered), after placing an order. Please al-
low additional shipping time to get to your local distributor.b Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.c Keyways are made according to JIS B1301 standards, Js 9 tolerance.d Areas of products which have been re-worked will not be black oxide coated.e For products having a tapped hole, a set screw is included.
[Caution on Secondary Operations]a Please read “Caution on Performing Secondary Operations” (Page 512) when perform-
ing modifications and/or secondary operations for safety concerns. b Due to the gear teeth being induction hardened, no secondary operations can be per-
formed on tooth areas including the bottom land (approx. 1 to 2 mm).
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
538
Ground WormsModule 5, 6KSWG
Worm WheelsModule 5, 6
R
P QQ’
L M N O
G
W3
Catalog No.Reduction
ratioTransverse
moduleNo. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' E
KAG5-20R1KAG5-20R2KAG5-30R1KAG5-30R2KAG5-40R1
2010301540
m5
2020303040
12121
4°05'8°08'4°05'8°08'4°05'
RRRRR
H4H4H5H5H5
2222222222
75757575
110
100100150150200
110110160160210
115115165165215
3535353535
KAG5-50R1KAG5-60R1
5060
5060
11
4°05'4°05'
RR
H5H5
2222
120130
250300
260310
265315
3535
KAG6-20R1KAG6-20R2KAG6-30R1KAG6-30R2KAG6-40R1
2010301540
m6
2020303040
12121
4°17'8°32'4°17'8°32'4°17'
RRRRR
H4H4H5H5H5
2525252525
8585
100100120
120120180180240
132132192192252
138138198198258
4040404040
KAG6-50R1KAG6-60R1
5060
5060
11
4°17'4°17'
RR
H5H5
2525
130150
300360
312372
318378
4040
Catalog No. Axialmodule
Number of starts
Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width (R) Hub width (L)
LH7 M N O P Q Q'
KSWG5-R1KSWG5-R2 m5 1
24°05'8°08'
RR
W3W3
2525
5656
7070
8080
8585
3030
55
KSWG6-R1KSWG6-R2 m6 1
24°17'8°32'
RR
W3W3
3030
6363
8080
9292
100100
3535
55
[Caution on Product Characteristics] a These worms produce axial thrust forces. See page 512 for more details.
[Caution on Product Characteristics] a The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
b There may be space in the casting between the two materials, but it will not affect the joint strength.
*H8, H9 shape have a hub made from FC200 cast iron.
KAG
GE F
J
A B D’DC
H1
Specifications
Precision grade KHK W 002 grade 2
Referencesection of gear Rotating plane
Gear teeth Standard full depth
Normalpressure angle 20°
Material CAC702 (formerly JIS AℓBC2)*
Heat treatment —
Tooth hardness —
Specifications
Precision grade KHK W 001 grade 2
Referencesection of gear Axial
Gear teeth Standard full depth
Normalpressure angle 20°
Material S45C
Heat treatment Teeth induction hardened
Tooth hardness 50~60HRC
For products not categorized in our Stock Gear series', custom gear production services with short lead times is available. For details see page VI.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
539
Total length Set screw Weight
(kg)Catalog No.
R Size S
120120
——
——
2.782.78
KSWG5-R1KSWG5-R2
140140
——
——
4.154.15
KSWG6-R1KSWG6-R2
J
G
B C D D’
E F
A
H4
( I )
J
A B C D D’
GE F
(H)
H5
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns. b Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including the bottom land (approx. 1 to 2 mm).
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
b The tooth and the hub areas, fastened by casting, are designed to have higher hardness than other parts of the gear. However, please avoid areas other than the hub. Also, the strength may decrease if secondary operations are performed.
Ground Worms
KSWG
Worm Wheels
KAG
Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm 1800 rpm
NOTE 1. Allowable torques for worm rotation (rpm)
2525252525
6060606060
——
(21)(21)(23)
——
(120)(120)(168)
8585
110110135
202200427425731
163157348340597
127117275259478
10193.2
224206394
88.480.2
196180346
79.071.1
175159309
65.558.1
147132259
0.22~0.350.22~0.350.22~0.350.22~0.350.22~0.35
2.792.794.754.758.84
KAG5-20R1KAG5-20R2KAG5-30R1KAG5-30R2KAG5-40R1
2525
6060
(23)(24)
(215)(260)
160185
11101550
9031270
7291030
605855
534763
479682
402575
0.22~0.350.22~0.35
12.717.6
KAG5-50R1KAG5-60R1
3030303030
7070707070
——
(26)(26)(28)
——
(142)(142)(200)
100100130130160
315314666668
1140
252244538532923
196182424403738
157145346321609
135124300278528
121110267246472
99.689.3
224203394
0.24~0.370.24~0.370.24~0.370.24~0.370.24~0.37
4.534.538.528.52
14.2
KAG6-20R1KAG6-20R2KAG6-30R1KAG6-30R2KAG6-40R1
3030
7070
(30)(30)
(258)(312)
190220
17202410
14001960
11301580
9351320
8161170
7331040
611875
0.24~0.370.24~0.37
21.029.7
KAG6-50R1KAG6-60R1
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
540
Steel WormsModule 0.5, 0.8KSW
Specifications
Precision grade KHK W 001 grade 4
Referencesection of gear Normal plane
Gear teeth Standard full depth
Normalpressure angle 20°
Material S45C
Heat treatment —
Tooth hardness (less than 194HB)
RS
N OL
W2
Bronze Worm WheelsModule 0.5, 0.8KBG
Specifications
Precision grade KHK W 002 grade 4
Referencesection of gear Normal plane
Gear teeth Standard full depth
Normalpressure angle 20°
Material CAC502 (formerly JIS PBC2)
Heat treatment —
Tooth hardness —
J
GE F
A B C D’
L
HAT
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' EKBG0.8-20R1KBG0.8-20R2KBG0.8-30R1KBG0.8-30R2KBG0.8-40R1
2010301540
m0.8
2020303040
12121
3°17'6°34'3°17'6°34'3°17'
RRRRR
HAHAHAHAHA
55556
1212181820
16.0316.1124.0424.1632.05
—————
17.617.625.625.633.6
99999
KBG0.8-50R1KBG0.8-60R1
5060
5060
11
3°17'3°17'
RR
HAHA
88
2525
40.0648.08
——
41.649.6
99
Catalog No. Normal module
Number of starts
Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width (R) Hub width (L)
LH8 M N O P Q Q'KSW0.5-R1KSW0.5-R2 m0.5 1
22°36'5°13'
RR
W2W2
55
——
1111
1212
——
——
——
KSW0.8-R1KSW0.8-R2 m0.8 1
23°17'6°34'
RR
W2W2
66
——
1414
15.615.6
——
——
——
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' EKBG0.5-20R1KBG0.5-20R2KBG0.5-30R1KBG0.5-30R2KBG0.5-40R1
2010301540
m0.5
2020303040
12121
2°36'5°13'2°36'5°13'2°36'
RRRRR
HATHATHATHATHAT
44445
99
121215
10.0110.0415.0215.0620.02
—————
1111161621
55555
KBG0.5-50R1KBG0.5-60R1
5060
5060
11
2°36'2°36'
RR
HATHAT
55
2025
25.0330.03
——
2631
55
[Caution on Product Characteristics]
[Caution on Product Characteristics]
a For W2-shaped products, a set screw is included. When setting up the mating wheel, make sure no friction occurs within the set screw.
b These worms produce axial thrust forces. See page 512 for more details.
a Worm Wheels are profile shifted to create the proper center distance.b For products with a tapped hole, a set screw is included.c The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.d If bore size is less than ø4, the diameter tolerance is H8. If bore size is ø5 or ø6, and the hole length exceeds 3 times the diameter, the tolerance is also H8.
For products not categorized in our Stock Gear series', custom gear production services with short lead times is available. For details see page VI.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
541
J
GE F
A B C D’
HA
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
b Gear tooth hardening of the worm reduces the precision (introduces errors in the lead and pressure angles). Avoid heat hardening as it will create bad tooth contact causing abrasion of the wheel.
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
Hub width Total length Mounting distance Set screw Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G J Size L 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm
NOTE 1 : Allowable torque for worm revolution (rpm)
Steel Worms
KSW
Bronze Worm Wheels
77777
1212121212
10.510.5131315.5
M3M3M3M3M4
3.53.53.53.53.5
0.27 0.28 0.58 0.59 0.99
0.23 0.23 0.50 0.49 0.85
0.19 0.18 0.41 0.39 0.71
0.15 0.15 0.34 0.32 0.60
0.14 0.13 0.30 0.29 0.54
0.13 0.12 0.28 0.26 0.50
0~0.160~0.160~0.160~0.160~0.16
0.0061 0.0061 0.014 0.014 0.023
KBG0.5-20R1KBG0.5-20R2KBG0.5-30R1KBG0.5-30R2KBG0.5-40R1
77
1212
1820.5
M4M4
3.53.5
1.50 2.10
1.28 1.80
1.08 1.52
0.92 1.31
0.83 1.19
0.77 1.09
0~0.160~0.16
0.039 0.059
KBG0.5-50R1KBG0.5-60R1
Hub width Total length Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm
NOTE 1 : Allowable torque for worm revolution (rpm)
99999
1818181818
1515191923
1.05 1.06 2.23 2.24 3.81
0.880.861.891.873.24
0.71 0.66 1.53 1.46 2.67
0.58 0.54 1.29 1.20 2.26
0.52 0.48 1.15 1.07 2.02
0.48 0.44 1.06 0.98 1.87
0.04~0.220.04~0.220.04~0.220.04~0.220.04~0.22
0.0230.0230.0550.0550.087
KBG0.8-20R1KBG0.8-20R2KBG0.8-30R1KBG0.8-30R2KBG0.8-40R1
99
1818
2731
5.76 8.06
4.906.88
4.07 5.73
3.47 4.90
3.13 4.46
2.90 4.12
0.04~0.220.04~0.22
0.130.18
KBG0.8-50R1KBG0.8-60R1
Total length Set screw Weight
(kg)Catalog No.
R Size S1818
M3M3
33
0.010 0.010
KSW0.5-R1KSW0.5-R2
3030
M4M4
55
0.0290.029
KSW0.8-R1KSW0.8-R2
KBG
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
542
a Worm Wheels are profile shifted to create the proper center distance.b H2 Shape Worm Gears have elongated casting holes in the web (H).c The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.d If bore size is less than ø4, the diameter tolerance is H8. If bore size is ø5 or ø6, and the hole length exceeds 3 times the diameter, the tolerance is also H8.
Steel WormsModule 1, 1.25KSW
RS
N OL
W2
Bronze Worm Wheels & Gray Iron Worm WheelsModule 1, 1.25KBG • KCG
Catalog No. Normal module
Number of starts
Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width (R) Hub width (L)
LH7 M N O P Q Q'KSW1-R1KSW1-R2 m1 1
23°35'7°11'
RR
W2W2
66
——
1616
1818
——
——
——
KSW1.25-R1KSW1.25-R2 m1.25 1
23°25'6°50'
RR
W2W2
88
——
2121
23.523.5
——
——
——
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' E
KBG1-20R1KBG1-20R2KBG1-30R1KBG1-30R2KBG1-40R1KBG1-50R1
201030154050
m1
202030304050
121211
3°35'7°11'3°35'7°11'3°35'3°35'
RRRRRR
H1H1H1H1H1H1
666688
161620202630
20.0520.1630.0730.2440.0850.1
222232324252
232333334353
101010101010
KBG1.25-20R1KBG1.25-20R2KBG1.25-30R1KBG1.25-30R2KBG1.25-40R1KBG1.25-50R1
201030154050
m1.25
202030304050
121211
3°25'6°50'3°25'6°50'3°25'3°25'
RRRRRR
H1H1H1H1H1H1
666688
202025253040
25.0425.1837.5737.7750.0962.61
27.527.5404052.565
28.7528.7541.2541.2553.7566.25
111111111111
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' E
KCG1-60R1KCG1-80R1KCG1-100R1KCG1-120R1
6080
100120
m1
6080
100120
1111
3°35'3°35'3°35'3°35'
RRRR
HBHBH2H2
10101010
30354040
60.1280.16
100.2120.24
6282
102122
6383
103123
10101010
[Caution on Product Characteristics] a For W2-shaped products, a set screw is included. When setting up the mating wheel, make sure no friction occurs within the set screw.
b These worms produce axial thrust forces. See page 512 for more details.c If bore size is less than ø4, the diameter tolerance is H8. If bore size is ø5 or ø6, and the hole length exceeds 3 times the diameter, the tolerance is also H8.
[Caution on Product Characteristics]
GE F
J
A B D’DC
H1
Specifications
Catalog No. KBG KCG
Precision grade KHK W 002 grade 4 KHK W 002 grade 4
Referencesection of gear Normal plane Normal plane
Gear teeth Standard full depth Standard full depth
Normalpressure angle 20° 20°
Material CAC502(formerly JIS PBC2) FC200
Heat treatment — —
Tooth hardness — —
KBG KCG
Specifications
Precision grade KHK W 001 grade 4
Referencesection of gear Normal plane
Gear teeth Standard full depth
Normalpressure angle 20°
Material S45C
Heat treatment —
Tooth hardness (less than 194HB)
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
543
Total length Set screw Weight
(kg)Catalog No.
R Size S3232
M4M4
55
0.0430.043
KSW1-R1KSW1-R2
3737
M5M5
55
0.0850.085
KSW1.25-R1KSW1.25-R2
* CS has a sand mold casting finish.
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
b Gear tooth hardening of the worm reduces the precision (introduces errors in the lead and pressure angles). Avoid heat hardening as it will create bad tooth contact causing abrasion of the wheel.
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm
NOTE 1 : Allowable torque for worm revolution (rpm)
Steel Worms
KSW
Bronze Worm Wheels & Gray Iron Worm Wheels
Hub width Total length Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm
NOTE 1 : Allowable torque for worm revolution (rpm)
101010101010
202020202020
181823232833
1.89 1.90 4.00 4.03 6.85
10.3
1.58 1.54 3.38 3.35 5.79 8.76
1.26 1.18 2.74 2.62 4.76 7.27
1.04 0.97 2.29 2.14 4.03 6.18
0.92 0.85 2.05 1.91 3.61 5.58
0.85 0.78 1.87 1.74 3.31 5.14
0.06~0.240.06~0.240.06~0.240.06~0.240.06~0.240.06~0.24
0.0430.0430.0890.0890.150.23
KBG1-20R1KBG1-20R2KBG1-30R1KBG1-30R2KBG1-40R1KBG1-50R1
999999
202020202020
232329.2529.2535.541.75
3.19 3.19 6.75 6.77
11.5 17.4
2.65 2.58 5.67 5.60 9.71
14.7
2.10 1.96 4.56 4.33 7.92
12.1
1.72 1.60 3.81 3.54 6.70
10.3
1.53 1.40 3.40 3.16 5.98 9.25
1.40 1.27 3.09 2.85 5.47 8.49
0.08~0.260.08~0.260.08~0.260.08~0.260.08~0.260.08~0.26
0.0700.0700.150.150.240.40
KBG1.25-20R1KBG1.25-20R2KBG1.25-30R1KBG1.25-30R2KBG1.25-40R1KBG1.25-50R1
10101010
20202020
(6)(6)(6)(6)
(51)(70)(91)
(111)
38485868
8.6914.721.930.5
7.3912.619.026.7
6.1410.516.022.5
5.249.11
13.919.6
4.788.30
12.718.0
4.397.72
11.916.7
0.06~0.240.06~0.240.06~0.240.06~0.24
0.210.350.470.63
KCG1-60R1KCG1-80R1KCG1-100R1KCG1-120R1
(H
( I )
J
A B C D D
GE F
CS
CS
’
)
H2
A B C D D’
( I )
J
GE F
(H)
CS
CS
HB
KBG • KCG
For products not categorized in our Stock Gear series', custom gear production services with short lead times is available. For details see page VI.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
544
Steel WormsModule 1.5KSW
R
P Q
L M N O
W1
Bronze Worm Wheels & Gray Iron Worm WheelsModule 1.5KBG • KCG
Catalog No.• : J Series (Available-on-request)
Normal module
Number of starts
Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width (R) Hub width (L)
LH7 M N O P Q Q' KSW1.5-R1
•KSW1.5-R1J8
•KSW1.5-R1J10m1.5
1 3°26' RW1W1TW1K
88
1020 25 28 30 10 —
KSW1.5-R2
•KSW1.5-R2J8
•KSW1.5-R2J102 6°54' R
W1W1TW1K
88
1020 25 28 30 10 —
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' E
KBG1.5-20R1KBG1.5-20R2KBG1.5-30R1KBG1.5-30R2KBG1.5-40R1KBG1.5-50R1
201030154050
m1.5
202030304050
121211
3°26'6°54'3°26'6°54'3°26'3°26'
RRRRRR
H1H1H1H1H1H1
88
10101212
222230303040
30.0530.2245.0845.3360.1175.13
333348486378
34.534.549.549.564.579.5
121212121214
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' E
KCG1.5-30R1KCG1.5-40R1KCG1.5-50R1KCG1.5-60R1KCG1.5-80R1KCG1.5-100R1
3040506080
100
m1.5
3040506080
100
111111
3°26'3°26'3°26'3°26'3°26'3°26'
RRRRRR
H1H1HBHBH2H2
101212121515
303040405050
45.0860.1175.1390.16
120.22150.27
48637893
123153
49.564.579.594.5
124.5154.5
121214141414
[Caution on Product Characteristics] a These worms produce axial thrust forces. See page 512 for more details.
[Caution on Product Characteristics] a Worm Wheels are profile shifted to create the proper center distance.b H2 Shape Worm Gears have elongated casting holes in the web (H).c The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
GE F
J
A B D’DC
H1
Specifications
Catalog No. KBG KCG
Precision grade KHK W 002 grade 4 KHK W 002 grade 4
Referencesection of gear Normal plane Normal plane
Gear teeth Standard full depth Standard full depth
Normalpressure angle 20° 20°
Material CAC502 (formerly JIS PBC2) FC200
Heat treatment — —
Tooth hardness — —
KBG KCG
Specifications
Precision grade KHK W 001 grade 4 *
Referencesection of gear Normal plane
Gear teeth Standard full depth
Normalpressure angle 20°
Material S45C
Heat treatment —
Tooth hardness (less than 194HB)
* The precision grade of J Series products is equivalent to the value shown in the table.
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns. b Gear tooth hardening of the worm reduces the precision (introduces errors in the lead and pressure angles). Avoid heat hardening as it will create bad tooth contact
causing abrasion of the wheel.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
545
Total length Keyway Set screw Weight
(kg)Catalog No.
• : J Series (Available-on-request)R Width×Depth Size S
40——
4 x 1.8
—M5M4
—55
0.120.120.11
KSW1.5-R1
•KSW1.5-R1J8
•KSW1.5-R1J10
40——
4 x 1.8
—M5M4
—55
0.120.120.11
KSW1.5-R2
•KSW1.5-R2J8
•KSW1.5-R2J10
* CS has a sand mold casting finish.
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
Series
NOTE 1 : Allowable torque for worm revolution (rpm)
NOTE 1 : Allowable torque for worm revolution (rpm)
Steel Worms
KSW
R
P Q
L M N O
S
W1T
R
P Q
L M N O
S
W1K
Bronze Worm Wheels & Gray Iron Worm Wheels
(H
( I )
J
A B C D D
GE F
CS
CS
’
)
H2
A B C D D’
( I )
J
GE F
(H)
CS
CS
HB
101010101010
222222222224
27.527.5353542.550
4.76 4.75
10.1 10.1 17.2 30.4
3.96 3.85 8.47 8.37
14.5 25.6
3.10 2.89 6.72 6.40
11.7 20.8
2.56 2.38 5.67 5.26 9.96
17.8
2.27 2.08 5.03 4.67 8.86
16.0
2.06 1.87 4.55 4.20 8.04
14.6
0.08~0.260.08~0.260.08~0.260.08~0.260.08~0.260.08~0.26
0.100.100.220.220.350.65
KBG1.5-20R1KBG1.5-20R2KBG1.5-30R1KBG1.5-30R2KBG1.5-40R1KBG1.5-50R1
101010101010
222224242424
——(6)(4)(9)(7)
——
(62)(79)
(112)(138)
3542.55057.572.587.5
6.0410.318.225.543.164.4
5.088.71
15.421.636.855.6
4.037.01
12.517.630.145.8
3.405.98
10.715.126.340.1
3.025.319.59
13.723.836.4
2.734.838.74
12.421.933.6
0.08~0.260.08~0.260.08~0.260.08~0.260.08~0.260.08~0.26
0.180.280.430.470.941.21
KCG1.5-30R1KCG1.5-40R1KCG1.5-50R1KCG1.5-60R1KCG1.5-80R1KCG1.5-100R1
[Caution on J series] a As available-on-request products, requires a lead-time for shipping within 5 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.
b Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.c Keyways are made according to JIS B1301 standards, Js 9 tolerance.d Areas of products which have been re-worked will not be black oxide coated.e For products having a tapped hole, a set screw is included.
Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm
Hub width Total length Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm
KBG • KCG
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
546
Steel WormsModule 2KSW
R
P Q
L M N O
W1
Bronze Worm Wheels & Gray Iron Worm WheelsModule 2KBG • KCG
Catalog No.• : J Series (Available-on-request)
Normal module
Number of starts
Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width (R) Hub width (L)
LH7 M N O P Q Q' KSW2-R1
•KSW2-R1J12
•KSW2-R1J14
m2
1 3°42' RW1W1KW1K
121214
25 31 35 32 14 —
KSW2-R2
•KSW2-R2J12
•KSW2-R2J142 7°25' R
W1W1KW1K
121214
25 31 35 32 14 —
KSW2-L1
•KSW2-L1J12
•KSW2-L1J141 3°42' L
W1W1KW1K
121214
25 31 35 32 14 —
KSW2-L2
•KSW2-L2J12
•KSW2-L2J142 7°25' L
W1W1KW1K
121214
25 31 35 32 14 —
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' EKBG2-20R1KBG2-20R2
2010
m2
2020
12
3°42'7°25'
RR
H1H1
1212
3333
40.0840.34
4444
4646
2222
KBG2-20L1KBG2-20L2
2010
2020
12
3°42'7°25'
LL
H1H1
1212
3333
40.0840.34
4444
4646
2222
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' EKCG2-20R1KCG2-20R2KCG2-30R1KCG2-30R2KCG2-40R1
2010301540
m2
2020303040
12121
3°42'7°25'3°42'7°25'3°42'
RRRRR
H1H1H1H1H1
1212121212
3333404045
40.0840.3460.1360.5180.17
4444646484
4646666686
2222222222
KCG2-50R1KCG2-50R2KCG2-60R1
502560
505060
121
3°42'7°25'3°42'
RRR
HBHBHB
121212
484860
100.21100.84120.25
104104124
106106126
222222
KCG2-20L1KCG2-20L2KCG2-30L1KCG2-30L2KCG2-40L1
2010301540
2020303040
12121
3°42'7°25'3°42'7°25'3°42'
LLLLL
H1H1H1H1H1
1212121212
3333404045
40.0840.3460.1360.5180.17
4444646484
4646666686
2222222222
KCG2-50L1KCG2-50L2KCG2-60L1
502560
505060
121
3°42'7°25'3°42'
LLL
HBHBHB
121212
484860
100.21100.84120.25
104104124
106106126
222222
[Caution on Product Characteristics] a Worm Wheels are profile shifted to create the proper center distance.b The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
GE F
J
A B D’DC
H1
KBG KCG
Specifications
Catalog No. KBG KCG
Precision grade KHK W 002 grade 4 KHK W 002 grade 4
Referencesection of gear Normal plane Normal plane
Gear teeth Standard full depth Standard full depth
Normalpressure angle 14° 30' 14° 30'
Material CAC502(formerly JIS PBC2) FC200
Heat treatment — —
Tooth hardness — —
Specifications
Precision grade KHK W 001 grade 4 *
Referencesection of gear Normal plane
Gear teeth Standard full depth
Normalpressure angle 14° 30'
Material S45C
Heat treatment —
Tooth hardness (less than 194HB)
* The precision grade of J Series products is equivalent to the value shown in the table.
[Caution on Product Characteristics][Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
b Gear tooth hardening of the worm reduces the precision (introduces errors in the lead and pressure angles). Avoid heat hardening as it will create bad tooth contact causing abrasion of the wheel.
a These worms produce axial thrust forces. See page 512 for more details.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
547
* CS has a sand mold casting finish.
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
Series Steel Worms
KSW
R
P Q
L M N O
S
W1K
Total length Keyway Set screw Weight
(kg)Catalog No.
• : J Series (Available-on-request)R Width×Depth Size S
46—
4 x 1.85 x 2.3
—M4M4
—77
0.200.200.18
KSW2-R1
•KSW2-R1J12
•KSW2-R1J14
46—
4 x 1.85 x 2.3
—M4M4
—77
0.200.200.18
KSW2-R2
•KSW2-R2J12
•KSW2-R2J14
46—
4 x 1.85 x 2.3
—M4M4
—77
0.200.200.18
KSW2-L1
•KSW2-L1J12
•KSW2-L1J14
46—
4 x 1.85 x 2.3
—M4M4
—77
0.200.200.18
KSW2-L2
•KSW2-L2J12
•KSW2-L2J14
[Caution on J series]
Bronze Worm Wheels & Gray Iron Worm Wheels
A B C D D’
( I )
J
GE F
(H)
CS
CS
HB
Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm
NOTE 1 : Allowable torque for worm revolution (rpm)
NOTE 1 : Allowable torque for worm revolution (rpm)
1313
3535
35.535.5
12.3 12.3
10.2 10.0
8.00 7.51
6.59 6.15
5.78 5.32
5.25 4.80
0.10~0.280.10~0.28
0.330.33
KBG2-20R1KBG2-20R2
1313
3535
35.535.5
12.3 12.3
10.2 10.0
8.00 7.51
6.59 6.15
5.78 5.32
5.25 4.80
0.10~0.280.10~0.28
0.330.33
KBG2-20L1KBG2-20L2
1313131313
3535353535
—————
—————
35.535.545.545.555.5
7.387.40
15.615.726.7
6.156.00
13.113.122.5
4.804.51
10.49.96
18.1
3.953.698.748.15
15.4
3.473.197.707.18
13.55
3.152.886.966.45
12.3
0.10~0.280.10~0.280.10~0.280.10~0.280.10~0.28
0.27 0.270.570.570.96
KCG2-20R1KCG2-20R2KCG2-30R1KCG2-30R2KCG2-40R1
131313
353535
(7)(7)(7)
(88)(88)
(108)
65.565.575.5
40.340.756.4
34.134.047.9
27.626.938.9
23.622.433.3
21.019.629.9
19.117.827.2
0.10~0.280.10~0.280.10~0.28
1.011.011.44
KCG2-50R1KCG2-50R2KCG2-60R1
1313131313
3535353535
—————
—————
35.535.545.545.555.5
7.387.40
15.615.726.7
6.156.00
13.113.122.5
4.804.51
10.49.96
18.1
3.953.698.748.15
15.4
3.473.197.707.18
13.55
3.152.886.966.45
12.3
0.10~0.280.10~0.280.10~0.280.10~0.280.10~0.28
0.270.270.570.570.96
KCG2-20L1KCG2-20L2KCG2-30L1KCG2-30L2KCG2-40L1
131313
353535
(7)(7)(7)
(88)(88)
(108)
65.565.575.5
40.340.756.4
34.134.047.9
27.626.938.9
23.622.433.3
21.019.629.9
19.117.827.2
0.10~0.280.10~0.280.10~0.28
1.011.011.44
KCG2-50L1KCG2-50L2KCG2-60L1
a As available-on-request products, requires a lead-time for shipping within 5 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.
b Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.
c Keyways are made according to JIS B1301 standards, Js 9 tolerance.d Areas of products which have been re-worked will not be black oxide coated.e For products having a tapped hole, a set screw is included.
Hub width Total length Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm
KBG • KCG
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
548
Steel WormsModule 2.5KSW
R
P Q
L M N O
W1
Bronze Worm Wheels & Gray Iron Worm WheelsModule 2.5KBG • KCG
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' EKBG2.5-20R1KBG2.5-20R2
2010
m2.5
2020
12
3°52'7°46'
RR
H1H1
1212
3535
50.1150.46
5555
57.557.5
2222
KBG2.5-20L1KBG2.5-20L2
2010
2020
12
3°52'7°46'
LL
H1H1
1212
3535
50.1150.46
5555
57.557.5
2222
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' EKCG2.5-20R1KCG2.5-20R2KCG2.5-30R1KCG2.5-30R2KCG2.5-40R1
2010301540
m2.5
2020303040
12121
3°52'7°46'3°52'7°46'3°52'
RRRRR
H1H1HBHBHB
1212121215
3535404045
50.1150.4675.1775.68
100.23
55558080
105
57.557.582.582.5
107.5
2222222222
KCG2.5-50R1KCG2.5-50R2KCG2.5-60R1
502560
505060
121
3°52'7°46'3°52'
RRR
HBHBHB
151515
505055
125.29126.16150.34
130130155
132.5132.5157.5
222222
KCG2.5-20L1KCG2.5-20L2KCG2.5-30L1KCG2.5-30L2KCG2.5-40L1
2010301540
2020303040
12121
3°52'7°46'3°52'7°46'3°52'
LLLLL
H1H1HBHBHB
1212121215
3535404045
50.1150.4675.1775.68
100.23
55558080
105
57.557.582.582.5
107.5
2222222222
KCG2.5-50L1KCG2.5-50L2KCG2.5-60L1
502560
505060
121
3°52'7°46'3°52'
LLL
HBHBHB
151515
505055
125.29126.16150.34
130130155
132.5132.5157.5
222222
KBG KCG
[Caution on Product Characteristics] a Worm Wheels are profile shifted to create the proper center distance.b The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
Specifications
Catalog No. KBG KCG
Precision grade KHK W 002 grade 4 KHK W 002 grade 4Referencesection of gear Normal plane Normal plane
Gear teeth Standard full depth Standard full depthNormalpressure angle 20° 20°
Material CAC502(formerly JIS PBC2) FC200
Heat treatment — —
Tooth hardness — —
Catalog No.• : J Series (Available-on-request)
Normal module
Number of starts
Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width (R) Hub width (L)
LH7 M N O P Q Q' KSW2.5-R1•KSW2.5-R1J15•KSW2.5-R1J16•KSW2.5-R1J17
m2.5
1 3°52' RW1W1KW1KW1K
15151617
30 37 42 45 18 —
KSW2.5-R2•KSW2.5-R2J15•KSW2.5-R2J16•KSW2.5-R2J172 7°46' R
W1W1KW1KW1K
15151617
30 37 42 45 18 —
KSW2.5-L1•KSW2.5-L1J15•KSW2.5-L1J16•KSW2.5-L1J171 3°52' L
W1W1KW1KW1K
15151617
30 37 42 45 18 —
KSW2.5-L2•KSW2.5-L2J15•KSW2.5-L2J16•KSW2.5-L2J172 7°46' L
W1W1KW1KW1K
15151617
30 37 42 45 18 —
Specifications
Precision grade KHK W 001 grade 4 * Referencesection of gear Normal plane
Gear teeth Standard full depthNormalpressure angle 20°
Material S45C
Heat treatment —
Tooth hardness (less than 194HB)
* The precision grade of J Series products is equivalent to the value shown in the table.
[Caution on Product Characteristics][Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
b Gear tooth hardening of the worm reduces the precision (introduces errors in the lead and pressure angles). Avoid heat hardening as it will create bad tooth contact causing abrasion of the wheel.
a These worms produce axial thrust forces. See page 512 for more details.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
549
Series Steel Worms
KSW
R
P Q
L M N O
S
W1K
* CS has a sand mold casting finish.
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
Total length Keyway Set screw Weight
(kg)Catalog No.
• : J Series (Available-on-request)R Width×Depth Size S
63—
5 x 2.35 x 2.35 x 2.3
—M4M4M4
—999
0.390.390.370.36
KSW2.5-R1•KSW2.5-R1J15•KSW2.5-R1J16•KSW2.5-R1J17
63—
5 x 2.35 x 2.35 x 2.3
—M4M4M4
—999
0.390.390.370.36
KSW2.5-R2•KSW2.5-R2J15•KSW2.5-R2J16•KSW2.5-R2J17
63—
5 x 2.35 x 2.35 x 2.3
—M4M4M4
—999
0.390.390.370.36
KSW2.5-L1•KSW2.5-L1J15•KSW2.5-L1J16•KSW2.5-L1J17
63—
5 x 2.35 x 2.35 x 2.3
—M4M4M4
—999
0.390.390.370.36
KSW2.5-L2•KSW2.5-L2J15•KSW2.5-L2J16•KSW2.5-L2J17
[Caution on J series]
Bronze Worm Wheels & Gray Iron Worm Wheels
A B C D D’
( I )
J
GE F
(H)
CS
CS
HB
Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm
NOTE 1 : Allowable torque for worm revolution (rpm)
Hub width Total length Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm
NOTE 1 : Allowable torque for worm revolution (rpm)
1414141414
3636363636
——
(10)(10)
(9)
——
(60)(60)(86)
43.543.5565668.5
12.912.927.327.546.7
10.610.422.822.539.0
8.307.78
18.017.231.3
6.836.36
15.114.126.5
5.975.49
13.212.323.3
5.444.96
12.011.121.2
0.13~0.310.13~0.310.13~0.310.13~0.310.13~0.31
0.400.400.700.701.02
KCG2.5-20R1KCG2.5-20R2KCG2.5-30R1KCG2.5-30R2KCG2.5-40R1
141414
363636
(9)(9)(9)
(110)(110)(136)
818193.5
70.671.198.8
59.058.682.9
47.846.467.3
40.738.657.6
36.133.651.5
33.030.747.0
0.13~0.310.13~0.310.13~0.31
1.461.461.93
KCG2.5-50R1KCG2.5-50R2KCG2.5-60R1
1414141414
3636363636
——
(10)(10)
(9)
——
(60)(60)(86)
43.543.5565668.5
12.912.927.327.546.7
10.610.422.822.539.0
8.307.78
18.017.231.3
6.836.36
15.114.126.5
5.975.49
13.212.323.3
5.444.96
12.011.121.2
0.13~0.310.13~0.310.13~0.310.13~0.310.13~0.31
0.400.400.700.701.02
KCG2.5-20L1KCG2.5-20L2KCG2.5-30L1KCG2.5-30L2KCG2.5-40L1
141414
363636
(9)(9)(9)
(110)(110)(136)
818193.5
70.671.198.8
59.058.682.9
47.846.467.3
40.738.657.6
36.133.651.5
33.030.747.0
0.13~0.310.13~0.310.13~0.31
1.461.461.93
KCG2.5-50L1KCG2.5-50L2KCG2.5-60L1
1414
3636
43.543.5
21.5 21.5
17.7 17.3
13.8 13.0
11.4 10.6
9.94 9.14
9.07 8.27
0.13~0.310.13~0.31
0.490.49
KBG2.5-20R1KBG2.5-20R2
1414
3636
43.543.5
21.5 21.5
17.7 17.3
13.8 13.0
11.4 10.6
9.94 9.14
9.07 8.27
0.13~0.310.13~0.31
0.490.49
KBG2.5-20L1KBG2.5-20L2
GE F
J
A B D’DC
H1
a As available-on-request products, requires a lead-time for shipping within 5 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.
b Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.
c Keyways are made according to JIS B1301 standards, Js 9 tolerance.d Areas of products which have been re-worked will not be black oxide coated.e For products having a tapped hole, a set screw is included.
KBG • KCG
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
550
Steel WormsModule 3KSW
R
P Q
L M N O
W1
Bronze Worm Wheels & Gray Iron Worm WheelsModule 3KBG • KCG
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' EKBG3-20R1KBG3-20R2
2010
m3
2020
12
3°55'7°50'
RR
H1H1
2020
5050
60.1460.57
6666
6969
2828
KBG3-20L1KBG3-20L2
2010
2020
12
3°55'7°50'
LL
H1H1
2020
5050
60.1460.57
6666
6969
2828
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' EKCG3-20R1KCG3-20R2KCG3-30R1KCG3-30R2KCG3-40R1
2010301540
m3
2020303040
12121
3°55'7°50'3°55'7°50'3°55'
RRRRR
H1H1H1H1HB
2020202020
5050555555
60.1460.5790.2190.85
120.28
66669696
126
69699999
129
2828282830
KCG3-50R1KCG3-50R2KCG3-60R1
502560
505060
121
3°55'7°50'3°55'
RRR
HBHBHB
202020
636370
150.35151.41180.42
156156186
159159189
303030
KCG3-20L1KCG3-20L2KCG3-30L1KCG3-30L2KCG3-40L1
2010301540
2020303040
12121
3°55'7°50'3°55'7°50'3°55'
LLLLL
H1H1H1H1HB
2020202020
5050555555
60.1460.5790.2190.85
120.28
66669696
126
69699999
129
2828282830
KCG3-50L1KCG3-50L2KCG3-60L1
502560
505060
121
3°55'7°50'3°55'
LLL
HBHBHB
202020
636370
150.35151.41180.42
156156186
159159189
303030
[Caution on Product Characteristics] a Worm Wheels are profile shifted to create the proper center distance.b The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
KBG KCG
* The precision grade of J Series products is equivalent to the value shown in the table.
Specifications
Catalog No. KBG KCG
Precision grade KHK W 002 grade 4 KHK W 002 grade 4Referencesection of gear Normal plane Normal plane
Gear teeth Standard full depth Standard full depthNormalpressure angle 14° 30' 14° 30'
Material CAC502(formerly JIS PBC2) FC200
Heat treatment — —
Tooth hardness — —
Catalog No.• : J Series (Available-on-request)
Normal module
Number of starts
Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width (R) Hub width (L)
LH7 M N O P Q Q' KSW3-R1•KSW3-R1J17•KSW3-R1J18•KSW3-R1J19•KSW3-R1J20
m3
1 3°55' R
W1W1KW1KW1KW1K
1617181920
35 44 50 50 20 —
KSW3-R2•KSW3-R2J17•KSW3-R2J18•KSW3-R2J19•KSW3-R2J20
2 7°50' R
W1W1KW1KW1KW1K
1617181920
35 44 50 50 20 —
KSW3-L1•KSW3-L1J17•KSW3-L1J18•KSW3-L1J19•KSW3-L1J20
1 3°55' L
W1W1KW1KW1KW1K
1617181920
35 44 50 50 20 —
KSW3-L2•KSW3-L2J17•KSW3-L2J18•KSW3-L2J19•KSW3-L2J20
2 7°50' L
W1W1KW1KW1KW1K
1617181920
35 44 50 50 20 —
Specifications
Precision grade KHK W 001 grade 4 * Referencesection of gear Normal plane
Gear teeth Standard full depthNormalpressure angle 14° 30'
Material S45C
Heat treatment —
Tooth hardness (less than 194HB)
[Caution on Product Characteristics] a These worms produce axial thrust forces. See page 512 for more details.
Newly addedNewly addedSeries Steel WormsR
P Q
L M N O
S
W1K
* CS has a sand mold casting finish.
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
Total length Keyway Set screw Weight
(kg)Catalog No.
• : J Series (Available-on-request)R Width×Depth Size S
70
—5 x 2.36 x 2.86 x 2.86 x 2.8
—M4M5M5M5
—10101010
0.640.620.600.580.56
KSW3-R1•KSW3-R1J17•KSW3-R1J18•KSW3-R1J19•KSW3-R1J20
70
—5 x 2.36 x 2.86 x 2.86 x 2.8
—M4M5M5M5
—10101010
0.640.620.600.580.56
KSW3-R2•KSW3-R2J17•KSW3-R2J18•KSW3-R2J19•KSW3-R2J20
70
—5 x 2.36 x 2.86 x 2.86 x 2.8
—M4M5M5M5
—10101010
0.640.620.600.580.56
KSW3-L1•KSW3-L1J17•KSW3-L1J18•KSW3-L1J19•KSW3-L1J20
70
—5 x 2.36 x 2.86 x 2.86 x 2.8
—M4M5M5M5
—10101010
0.640.620.600.580.56
KSW3-L2•KSW3-L2J17•KSW3-L2J18•KSW3-L2J19•KSW3-L2J20
[Caution on J series]
Bronze Worm Wheels & Gray Iron Worm Wheels
KBG • KCG
A B C D D’
( I )
J
GE F
(H)
CS
CS
HB
Hub width Total length Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm
NOTE 1 : Allowable torque for worm revolution (rpm)
1515151515
4343434345
————(9)
————
(107)
5252676782
22.122.246.647.279.8
18.117.738.738.566.3
14.113.330.629.353.2
11.510.725.423.744.6
10.09.24
22.220.839.1
0.15~0.330.15~0.330.15~0.330.15~0.330.15~0.33
0.730.731.501.501.79
KCG3-20R1KCG3-20R2KCG3-30R1KCG3-30R2KCG3-40R1
151515
454545
(9)(9)(9)
(138)(138)(166)
9797
112
121122169
100100141
81.179.1
114
68.465.196.7
60.556.786.3
0.15~0.330.15~0.330.15~0.33
2.502.503.40
KCG3-50R1KCG3-50R2KCG3-60R1
1515151515
4343434345
————(9)
————
(107)
5252676782
22.122.246.647.279.8
18.117.738.738.566.3
14.113.330.629.353.2
11.510.725.423.744.6
10.09.24
22.220.839.1
0.15~0.330.15~0.330.15~0.330.15~0.330.15~0.33
0.730.731.501.501.79
KCG3-20L1KCG3-20L2KCG3-30L1KCG3-30L2KCG3-40L1
151515
454545
(9)(9)(9)
(138)(138)(166)
9797
112
121122169
100100141
81.179.1
114
68.465.196.7
60.556.786.3
0.15~0.330.15~0.330.15~0.33
2.502.503.40
KCG3-50L1KCG3-50L2KCG3-60L1
1515
4343
5252
36.8 37.0
30.1 29.5
23.5 22.1
19.1 17.9
16.7 15.4
15.2 14.0
0.15~0.330.15~0.33
0.890.89
KBG3-20R1KBG3-20R2
1515
4343
5252
36.8 37.0
30.1 29.5
23.5 22.1
19.1 17.9
16.7 15.4
15.2 14.0
0.15~0.330.15~0.33
0.890.89
KBG3-20L1KBG3-20L2
[Caution on Secondary Operations]a Please read “Caution on Performing Secondary Operations” (Page 512) when per-
forming modifications and/or secondary operations for safety concerns. b Gear tooth hardening of the worm reduces the precision (introduces errors in the lead
and pressure angles). Avoid heat hardening as it will create bad tooth contact causing abrasion of the wheel.
NOTE 1 : Allowable torque for worm revolution (rpm)
GE F
J
A B D’DC
H1
a As available-on-request products, requires a lead-time for shipping within 5 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.b Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.c Keyways are made according to JIS B1301 standards, Js 9 tolerance.d Areas of products which have been re-worked will not be black oxide coated.e For products having a tapped hole, a set screw is included.
Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm
KSW
551
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
552
Steel WormsModule 4KSW
R
P Q
L M N O
W1
Bronze Worm Wheels & Gray Iron Worm WheelsModule 4KBG • KCG
Catalog No. Normal module
Number of starts
Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width (R) Hub width (L)
LH7 M N O P Q Q'KSW4-R1KSW4-R2 m4 1
23°42'7°25'
RR
W1W1
2222
5050
6262
7070
7070
2525
——
KSW4-L1KSW4-L2 m4 1
23°42'7°25'
LL
W1W1
2222
5050
6262
7070
7070
2525
——
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' EKBG4-20R1KBG4-20R2
2010
m4
2020
12
3°42'7°25'
RR
H1H1
2020
6060
80.1780.67
8888
9090
3535
KBG4-20L1KBG4-20L2
2010
2020
12
3°42'7°25'
LL
H1H1
2020
6060
80.1780.67
8888
9090
3535
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' EKCG4-20R1KCG4-20R2KCG4-30R1KCG4-30R2KCG4-40R1
2010301540
m4
2020303040
12121
3°42'7°25'3°42'7°25'3°42'
RRRRR
H1H1HBHBHB
2020202020
6060606070
80.1780.67
120.25121.01160.33
8888
128128168
9090
130130171
3535353535
KCG4-50R1KCG4-50R2KCG4-60R1
502560
505060
121
3°42'7°25'3°42'
RRR
H2H2H2
202020
707080
200.42201.69240.5
208208248
211211251
353535
KCG4-20L1KCG4-20L2KCG4-30L1KCG4-30L2KCG4-40L1
2010301540
2020303040
12121
3°42'7°25'3°42'7°25'3°42'
LLLLL
H1H1HBHBHB
2020202020
6060606070
80.1780.67
120.25120.01160.33
8888
128128168
9090
130130171
3535353535
KCG4-50L1KCG4-50L2KCG4-60L1
502560
505060
121
3°42'7°25'3°42'
LLL
H2H2H2
202020
707080
200.42201.69240.5
208208248
211211251
353535
BG CG
Specifications
Precision grade KHK W 001 grade 4
Referencesection of gear Normal plane
Gear teeth Standard full depth
Normalpressure angle 14° 30'
Material S45C
Heat treatment —
Tooth hardness (less than 194HB)
[Caution on Product Characteristics] a These worms produce axial thrust forces. See page 512 for more details.
[Caution on Product Characteristics] a Worm Wheels are profile shifted to create the proper center distance.b H2 Shape Worm Gears have elongated casting holes in the web (H).c The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
Specifications
Catalog No. BG CG
Precision grade KHK W 002 grade 4 KHK W 002 grade 4
Referencesection of gear Normal plane Normal plane
Gear teeth Standard full depth Standard full depth
Normalpressure angle 14° 30' 14° 30'
Material CAC502(formerly JIS PBC2) FC200
Heat treatment — —
Tooth hardness — —
GE F
J
A B D’DC
H1
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
553
Total length Set screw Weight
(kg)Catalog No.
R Size S9595
——
——
1.761.76
KSW4-R1KSW4-R2
9595
——
——
1.761.76
KSW4-L1KSW4-L2
* CS has a sand mold casting finish.
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
Steel Worms
KSW
Bronze Worm Wheels & Gray Iron Worm Wheels
(H
( I )
J
A B C D D
GE F
CS
CS
’
)
A B C D D’
( I )
J
GE F
(H)
CS
CS
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns. b Gear tooth hardening of the worm reduces the precision (introduces errors in the lead and pressure angles). Avoid heat hardening as it will create bad tooth contact
causing abrasion of the wheel.
H2HB
Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm
Hub width Total length Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm
NOTE 1 : Allowable torque for worm revolution (rpm)
1717171717
5252525252
——
(12)(12)(11)
——
(96)(96)
(136)
71719191
111
45.645.596.396.8
165
37.036.079.178.3
136
28.726.962.359.4
108
23.021.450.947.389.4
0.17~0.370.17~0.370.17~0.370.17~0.370.17~0.37
1.561.562.522.523.81
KCG4-20R1KCG4-20R2KCG4-30R1KCG4-30R2KCG4-40R1
171717
525252
(12)(12)(12)
(176)(176)(218)
131131151
249250348
205204288
165160233
137130194
0.17~0.370.17~0.370.17~0.37
4.784.786.36
KCG4-50R1KCG4-50R2KCG4-60R1
1717171717
5252525252
——
(12)(12)(11)
——
(96)(96)
(136)
71719191
111
45.645.596.396.8
165
37.036.079.178.3
136
28.726.962.359.4
108
23.021.450.947.389.4
0.17~0.370.17~0.370.17~0.370.17~0.370.17~0.37
1.561.562.522.523.81
KCG4-20L1KCG4-20L2KCG4-30L1KCG4-30L2KCG4-40L1
171717
525252
(12)(12)(12)
(176)(176)(218)
131131151
249250348
205204288
165160233
137130194
0.17~0.370.17~0.370.17~0.37
4.784.786.36
KCG4-50L1KCG4-50L2KCG4-60L1
1717
5252
7171
75.9 75.9
61.7 60.0
47.9 44.8
38.4 35.7
33.7 30.9
30.1 27.5
0.17~0.370.17~0.37
1.911.91
KBG4-20R1KBG4-20R2
1717
5252
7171
75.9 75.9
61.7 60.0
47.9 44.8
38.4 35.7
33.7 30.9
30.1 27.5
0.17~0.370.17~0.37
1.911.91
KBG4-20L1KBG4-20L2
NOTE 1 : Allowable torque for worm revolution (rpm)
KBG • KCG
For products not categorized in our Stock Gear series', custom gear production services with short lead times is available. For details see page VI.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
554
Steel WormsModule 5, 6KSW
R
P QQ’
L M N O
W3
Bronze Worm Wheels & Gray Iron Worm WheelsModule 5, 6KBG • KCG
Catalog No. Normal module
Number of starts
Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width (R) Hub width (L)
LH7 M N O P Q Q'KSW5-R1KSW5-R2 m5 1
24°06'8°13'
RR
W3W3
2525
5656
7070
8080
8585
2020
2020
KSW6-R1KSW6-R2 m6 1
24°18'8°38'
RR
W3W3
3030
6464
8080
9292
100100
2525
2525
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' EKBG5-20R1KBG5-20R2
2010 m5 20
2012
4°06'8°13'
RR
H1H1
2222
7575
100.26101.04
110110
113113
4545
KBG6-20R1KBG6-20R2
2010 m6 20
2012
4°18'8°38'
RR
H1H1
2525
100100
120.34121.38
132132
136136
5252
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
AH7 B C D D' EKCG5-20R1KCG5-20R2KCG5-30R1KCG5-30R2KCG5-40R1
2010301540 m5
2020303040
12121
4°06'8°13'4°06'8°13'4°06'
RRRRR
H1H1HBHBH2
2222222222
7575757590
100.26101.04150.38151.56200.51
110110160160210
113113163163213
4545454545
KCG5-50R1KCG5-50R2KCG5-60R1
502560
505060
121
4°06'8°13'4°06'
RRR
H2H2H2
222222
9090
100
250.61252.59300.77
260260310
263263313
454545
KCG6-20R1KCG6-20R2KCG6-30R1KCG6-30R2KCG6-40R1
2010301540 m6
2020303040
12121
4°18'8°38'4°18'8°38'4°18'
RRRRR
H1H1HBHBH2
2525252525
100100100100100
120.34121.38180.51182.06240.68
132132192192252
136136196196256
5252525252
KCG6-50R1KCG6-50R2KCG6-60R1
502560
505060
121
4°18'8°38'4°18'
RRR
H2H2H2
252525
100100120
300.85303.44361.02
312312372
316316376
525252
KBG KCG
Specifications
Catalog No. KBG KCG
Precision grade KHK W 002 grade 4 KHK W 002 grade 4
Referencesection of gear Normal plane Normal plane
Gear teeth Standard full depth Standard full depth
Normalpressure angle 14° 30' 14° 30'
Material CAC502(formerly JIS PBC2) FC200
Heat treatment — —
Tooth ardness — —
[Caution on Product Characteristics] a These worms produce axial thrust forces. See page 512 for more details.
[Caution on Product Characteristics] a Worm Wheels are profile shifted to create the proper center distance.b H2 Shape Worm Gears have elongated casting holes in the web (H).c The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 510 for more details.
GE F
J
A B D’DC
H1
Specifications
Precision grade KHK W 001 grade 4
Referencesection of gear Normal plane
Gear teeth Standard full depth
Normalpressure angle 14° 30'
Material S45C
Heat treatment —
Tooth hardness (less than 194HB)
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
555
Steel Worms
Total length Set screw Weight
(kg)Catalog No.
R Size S125125
——
——
2.862.86
KSW5-R1KSW5-R2
150150
——
——
4.384.38
KSW6-R1KSW6-R2
KSW
* CS has a sand mold casting finish.
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
Bronze Worm Wheels & Gray Iron Worm Wheels
(H
( I )
J
A B C D D
GE F
CS
CS
’
)
A B C D D’
( I )
J
GE F
(H)
CS
CS
KBG • KCG
H2HB
Hub width Total length Web thickness Web O.D. Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G (H) ( I ) J 30 rpm 100 rpm 300 rpm 600 rpm
Hub width Total length Mounting distance Allowable torque (N·m) NOTE 1 Backlash
(mm)
Weight
(kg)Catalog No.
F G J 30 rpm 100 rpm 300 rpm 600 rpm 900 rpm 1200 rpm
NOTE 1 : Allowable torque for worm revolution (rpm)
2020202020
6565656565
——
(13)(13)(16)
——
(127)(127)(172)
8585
110110135
87.487.9
185187316
70.368.9
150150258
54.751.5
119114206
43.841.096.890.6
170
0.20~0.400.20~0.400.20~0.400.20~0.400.20~0.40
3.183.184.784.787.44
KCG5-20R1KCG5-20R2KCG5-30R1KCG5-30R2KCG5-40R1
202020
656565
(16)(16)(13)
(223)(223)(276)
160160185
477483668
390390548
315307443
261249369
0.20~0.400.20~0.400.20~0.40
9.799.79
12.0
KCG5-50R1KCG5-50R2KCG5-60R1
2020202020
7272727272
——
(15)(15)(15)
——
(155)(155)(213)
100100130130160
139141294299502
111110237238407
86.281.8
187181325
—————
0.22~0.420.22~0.420.22~0.420.22~0.420.22~0.42
5.395.398.288.28
10.9
KCG6-20R1KCG6-20R2KCG6-30R1KCG6-30R2KCG6-40R1
202020
727272
(16)(16)(17)
(275)(275)(336)
190190220
760774
1060
615620865
496488698
———
0.22~0.420.22~0.420.22~0.42
14.014.019.8
KCG6-50R1KCG6-50R2KCG6-60R1
2020
6565
8585
146 146
117 115
91.2 85.8
73.0 68.4
63.7 58.8
56.9 52.2
0.20~0.400.20~0.40
3.893.89
KBG5-20R1KBG5-20R2
2020
7272
100100
232 235
185 183
144 136
115 109
99.2 92.3
88.882.0
0.22~0.420.22~0.42
6.606.60
KBG6-20R1KBG6-20R2
NOTE 1 : Allowable torque for worm revolution (rpm)
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns. b Gear tooth hardening of the worm reduces the precision (introduces errors in the lead and pressure angles). Avoid heat hardening as it will create bad tooth contact
causing abrasion of the wheel.
For products not categorized in our Stock Gear series', custom gear production services with short lead times is available. For details see page VI.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
556
Stainless Steel WormsModule 0.5, 0.8KSUW
Plastic Worm WheelsModule 0.5, 0.8KDG
Specifications
Precision grade KHK W 002 grade 5
Referencesection of gear Normal plane
Gear teeth Standard full depth
Normalpressure angle 20°
Material Polyacetal
Heat treatment —
Tooth hardness —
RS
N OL
W2
Catalog No. Normal module
Number of starts
Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length
LH8 M N O P Q R
KSUW0.5-R1KSUW0.5-R2
m0.5 12
2°36'5°13'
RR
W2W2
55
——
1111
1212
——
——
1818
KSUW0.8-R1KSUW0.8-R2
m0.8 12
3°17'6°34'
RR
W2W2
66
——
1414
15.615.6
——
——
3030
JG
E F
A B C D’
HA
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
A B C D D' E
KDG0.5-20R1KDG0.5-20R2KDG0.5-30R1KDG0.5-30R2KDG0.5-40R1
2010301540
m0.5
2020303040
12121
2°36'5°13'2°36'5°13'2°36'
RRRRR
HAHAHAHAHA
44445
99
121215
10.01 10.04 15.02 15.06 20.02
—————
1111161621
55555
KDG0.5-50R1KDG0.5-60R1
5060
5060
11
2°36'2°36'
RR
HAHA
55
2025
25.03 30.03
——
2631
55
KDG0.8-20R1KDG0.8-20R2KDG0.8-30R1KDG0.8-30R2KDG0.8-40R1
2010301540
m0.8
2020303040
12121
3°17'6°34'3°17'6°34'3°17'
RRRRR
HAHAHAHAHA
55556
1212181820
16.03 16.11 24.04 24.16 32.05
—————
17.617.625.625.633.6
99999
KDG0.8-50R1KDG0.8-60R1
5060
5060
11
3°17'3°17'
RR
HAHA
88
2525
40.0748.08
——
41.649.6
99
- 0.05- 0.10
[Caution on Product Characteristics] a For W2-shaped products, a set screw is included. When setting up the mating wheel, make sure no friction occurs within the set screw.
b These worms produce axial thrust forces. See page 512 for more details.
[Caution on Product Characteristics] a Worm Wheels are profile shifted to create the proper center distance.b The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see
page 510 for more details.c Since the bore is finished with a minus tolerance, you can use a shaft with a force fit.
Specifications
Precision grade KHK W 001 grade 4
Referencesection of gear Normal plane
Gear teeth Standard full depth
Normalpressure angle 20°
Material SUS303
Heat treatment —
Tooth hardness (less than 187HB)
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
557
Set Screw Weight
(kg)Catalog No.
Size S
M3M3
33
0.010 0.010
KSUW0.5-R1KSUW0.5-R2
M4M4
55
0.029 0.029
KSUW0.8-R1KSUW0.8-R2
Hub width Total length Mounting distance Allowable torque (N·m) Allowable torque kgf·m) Backlash
(mm)
Weight
(g)Catalog No.
F G J Bending strength Bending strength
77777
1212121212
10.510.5131315.5
0.067 0.067 0.11 0.11 0.16
0.0068 0.0069 0.011 0.011 0.016
0~0.160~0.160~0.160~0.160~0.16
1.01 1.01 2.21 2.21 3.72
KDG0.5-20R1KDG0.5-20R2KDG0.5-30R1KDG0.5-30R2KDG0.5-40R1
77
1212
1820.5
0.21 0.26
0.022 0.027
0~0.160~0.16
6.36 9.67
KDG0.5-50R1KDG0.5-60R1
99999
1818181818
1515191923
0.31 0.31 0.52 0.52 0.74
0.031 0.032 0.053 0.053 0.076
0.04~0.220.04~0.220.04~0.220.04~0.220.04~0.22
3.73 3.73 8.84 8.84
14.0
KDG0.8-20R1KDG0.8-20R2KDG0.8-30R1KDG0.8-30R2KDG0.8-40R1
99
1818
2731
0.98 1.21
0.10 0.12
0.04~0.220.04~0.22
21.6 28.8
KDG0.8-50R1KDG0.8-60R1
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
Stainless Steel Worms
KSUW
Plastic Worm Wheels
KDG
For products not categorized in our Stock Gear series', custom gear production services with short lead times is available. For details see page VI.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
558
Module 1, 1.5KSUW
Module 1, 1.5KPG
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
A B C D D' E
KPG1-20R1KPG1-20R2KPG1-30R1KPG1-40R1KPG1-50R1
2010304050
m1
2020304050
12111
3°35'7°11'3°35'3°35'3°35'
RRRRR
H1H1H1H1H1
66688
1616202630
20.0420.1630.0640.0850.1
2222324252
2323334353
1010101010
KPG1.5-20R1KPG1.5-20R2
2010 m1.5 20
2012
3°26'6°54'
RR
H1H1
88
2222
30.0530.22
3333
34.534.5
1212
RS
N OL
W2
GE F
J
A B D’DC
H1
Stainless Steel Worms
Plastic Worm Wheels
[Caution on Product Characteristics] a For W2-shaped products, a set screw is included. When setting up the mating wheel, make sure no friction occurs within the set screw.
b These worms produce axial thrust forces. See page 512 for more details.c If bore size is less than ø4, the tolerance is H8. If bore size is ø5 or ø6, and the hole length exceeds 3 times the diameter, the
tolerance is also H8.
[Caution on Product Characteristics] a Worm Wheels are profile shifted to create the proper center distance.b Significant variations in temperature or humidity can cause dimensional changes in plastic gears (MC Nylon gears), for bore
size (H8 when produced), teeth diameter, and backlash. c The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see
page 510 for more details.
Specifications
Precision grade KHK W 002 grade 5 *
Referencesection of gear Normal plane
Gear teeth Standard full depth
Normalpressure angle 20°
Material MC901 Nylon
Heat treatment —
Tooth hardness —
Specifications
Precision grade KHK W 001 grade 4 *
Referencesection of gear Normal plane
Gear teeth Standard full depth
Normalpressure angle 20°
Material SUS303
Heat treatment —
Tooth hardness (less than 187HB)
Catalog No.• : J Series (Available-on-request)
Norma mod-ule
Number of starts
Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length
LH7 M N O P Q R
KSUW1-R1 KSUW1-R2 m1 1
23°35'7°11'
RR
W2W2
66
——
1616
1818
——
——
3232
KSUW1.5-R1•KSUW1.5-R1J8•KSUW1.5-R1J10
m1.5
1 3°26' RW1W1TW1K
88
1020 25 28 30 10 40
KSUW1.5-R2•KSUW1.5-R2J8•KSUW1.5-R2J10
2 6°54' RW1W1TW1K
88
1020 25 28 30 10 40
* The precision grade of this product is equivalent to the value shown in the table.
* The precision grade of J Series products is equivalent to the value shown in the table.
* In regards to MC Nylon gears, other materials are available for plastic gears, including Ultra High Molecular Weight Polyethylene (UHMW-PE), which has excellent abrasion resistance. Poly Ether Ether Ketone (PEEK) also has quality properties. A single piece order is acceptable and will be produced as a custom-made gear. For details on quotations and orders please see page VI.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
559
Hub width Total length Mounting distance Allowable torque (N·m) Allowable torque kgf·m) Backlash
(mm)
Weight
(kg)Catalog No.
F G J Bending strength Bending strength
1010101010
2020202020
1818232833
0.620.621.031.491.96
0.060 0.060 0.10 0.15 0.20
0~0.280~0.280~0.280~0.280~0.28
0.00580.00580.0120.0210.031
KPG1-20R1KPG1-20R2KPG1-30R1KPG1-40R1KPG1-50R1
1010
2222
27.527.5
1.661.68
0.170.17
0~0.300~0.30
0.0140.014
KPG1.5-20R1KPG1.5-20R2
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
b Plastic gears are susceptible to the effects of temperature and moisture. Dimensional changes may occur while performing secondary operations and during post-machining operations.
[Caution on Secondary Operations] a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns.
Stainless Steel Worms
Plastic Worm Wheels
R
P Q
L M N O
W1
KSUW
KPG
R
P Q
L M N O
S
W1T
R
P Q
L M N O
S
W1K
Keyway Set screw Weight
(kg)Catalog No.
• : J Series (Available-on-request)Width×Depth Size S
——
M4M4
55
0.0420.042
KSUW1-R1 KSUW1-R2
——
4 x 1.8
—M5M4
—55
0.120.120.11
KSUW1.5-R1•KSUW1.5-R1J8•KSUW1.5-R1J10
——
4 x 1.8
—M5M4
—55
0.120.120.11
KSUW1.5-R2•KSUW1.5-R2J8•KSUW1.5-R2J10
Series
a As available-on-request products, requires a lead-time for shipping within 5 working-days (excludes the day ordered), after placing an order.
Please allow additional shipping time to get to your local distributor.b Number of products we can process for one order is 1 to 20 units. For quantities of
21 or more pieces, we need to quote price and lead time.c Keyways are made according to JIS B1301 standards, Js 9 tolerance.d For products having a tapped hole, a set screw is included.
[Caution on J series]
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
560
Module 2, 2.5, 3KSUW
Specifications
Precision grade KHK W 001 grade 4* Referencesection of gear Normal plane
Gear teeth Standard full depthNormalpressure angle 14° 30'*
Material SUS303
Heat treatment —
Tooth hardness (less than 187HB)
Module 2, 2.5, 3KPG
Specifications
Precision grade KHK W 002 grade 5Referencesection of gear Normal plane
Gear teeth Standard full depthNormalpressure angle 14° 30'*
Material MC901 Nylon
Heat treatment —
Tooth hardness —
R
P Q
L M N O
W1
Catalog No.• : J Series (Available-on-request)
Normal module
Number of starts
Lead angle Hand thread ShapeBore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length
LH7 M N O P Q R KSUW2-R1•KSUW2-R1J12•KSUW2-R1J14
m2
1 3°42' RW1W1KW1K
121214
25 31 35 32 14 46
KSUW2-R2•KSUW2-R2J12•KSUW2-R2J14 2 7°25' R
W1W1KW1K
121214
25 31 35 32 14 46
KSUW2.5-R1•KSUW2.5-R1J15•KSUW2.5-R1J16•KSUW2.5-R1J17 m2.5
1 3°52' R
W1W1KW1KW1K
15151617
30 37 42 45 18 63
KSUW2.5-R2•KSUW2.5-R2J15•KSUW2.5-R2J16•KSUW2.5-R2J17
2 7°46' R
W1W1KW1KW1K
15151617
30 37 42 45 18 63
KSUW3-R1•KSUW3-R1J17•KSUW3-R1J18•KSUW3-R1J19•KSUW3-R1J20 m3
1 3°55' R
W1W1KW1KW1KW1K
1617181920
35 44 50 50 20 70
KSUW3-R2•KSUW3-R2J17•KSUW3-R2J18•KSUW3-R2J19•KSUW3-R2J20
2 7°50' R
W1W1KW1KW1KW1K
1617181920
35 44 50 50 20 70
Catalog No.Reduction
ratioNormal module
No. of teeth
Number of starts
Helix angle Hand thread ShapeBore Hub dia. Pitch dia. Throat dia. Outside dia. Face width
A B C D D' E
KPG2-20R1KPG2-20R2
2010 m2 20
2012
3°42'7°25'
RR
H1H1
1010
3333
40.0840.34
4444
4646
2222
KPG2.5-20R1KPG2.5-20R2
2010 m2.5 20
2012
3°52'7°46'
RR
H1H1
1212
3535
50.1150.46
5555
57.557.5
2222
KPG3-20R1KPG3-20R2
2010 m3 20
2012
3°55'7°50'
RR
H1H1
1515
5050
60.1460.57
6666
6969
2828
Stainless Steel Worms
Plastic Worm Wheels
[Caution on Product Characteristics] a Worm Wheels are profile shifted to create the proper center distance.b Significant variations in temperature or humidity can cause dimensional changes in plastic gears (MC Nylon gears), for bore size (H8 when
produced), teeth diameter, and backlash. c The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Usage above the value in brack-
ets will exceed the maximum allowable sliding speed, if no lubrication is applied. So, lubrication is required. Please see page 510 for more details.
* The precision grade of J Series products is equivalent to the value shown in the table.* The pressure angle is at 20 degrees for module 2.5.
* The pressure angle is at 20 degrees for module 2.5.
Sp
urG
ears
Hel
ical
Gea
rsIn
tern
alG
ears
Rac
ksC
P R
acks
& P
inio
nsM
iter
Gea
rsB
evel
Gea
rsS
crew
Gea
rsW
orm
Gea
r P
air
Bev
elG
earb
oxes
Oth
erP
rod
ucts
561
Hub width Total length Mounting distance Allowable torque (N·m) Allowable torque kgf·m) Backlash
(mm)
Weight
(kg)Catalog No.
F G J Bending strength Bending strength
1313
3535
35.535.5
4.784.82
0.490.49
0~0.330~0.33
0.0460.046
KPG2-20R1KPG2-20R2
1414
3636
43.543.5
(8.46)(8.54)
0.860.87
0~0.360~0.36
0.0660.066
KPG2.5-20R1KPG2.5-20R2
1515
4343
5252
(13.7) (13.8)
1.40 1.41
0~0.380~0.38
0.130.13
KPG3-20R1KPG3-20R2
GE F
J
A B D’DC
H1
[Caution on Secondary Operations]
[Caution on Secondary Operations]a Please read “Caution on Performing Secondary Operations” (Page 512)
when performing modifications and/or secondary operations for safety concerns.
a Please read “Caution on Performing Secondary Operations” (Page 512) when performing modifications and/or secondary operations for safety concerns. b Plastic gears are susceptible to the effects of temperature and moisture. Dimensional changes may occur while performing secondary operations and during post-machining operations.
[Caution on Product Characteristics]a These worms produce axial thrust forces. See page 512 for more details.
Series Stainless Steel Worms
KSUW
R
P Q
L M N O
S
W1K
Plastic Worm Wheels
KPG
Keyway Set screw Weight
(kg)Catalog No.
• : J Series (Available-on-request)Width×Depth Size S—
4 x 1.85 x 2.3
—M4M4
—77
0.200.200.18
KSUW2-R1•KSUW2-R1J12•KSUW2-R1J14
—4 x 1.85 x 2.3
—M4M4
—77
0.200.200.18
KSUW2-R2•KSUW2-R2J12•KSUW2-R2J14
—5 x 2.35 x 2.35 x 2.3
—M4M4M4
—999
0.390.380.370.36
KSUW2.5-R1•KSUW2.5-R1J15•KSUW2.5-R1J16•KSUW2.5-R1J17
—5 x 2.35 x 2.35 x 2.3
—M4M4M4
—999
0.390.380.370.36
KSUW2.5-R2•KSUW2.5-R2J15•KSUW2.5-R2J16•KSUW2.5-R2J17
—5 x 2.36 x 2.86 x 2.86 x 2.8
—M4M5M5M5
—10101010
0.630.620.590.580.56
KSUW3-R1•KSUW3-R1J17•KSUW3-R1J18•KSUW3-R1J19•KSUW3-R1J20
—5 x 2.36 x 2.86 x 2.86 x 2.8
—M4M5M5M5
—10101010
0.630.620.590.580.56
KSUW3-R2•KSUW3-R2J17•KSUW3-R2J18•KSUW3-R2J19•KSUW3-R2J20
a As available-on-request products, requires a lead-time for shipping within 5 working-days (excludes the day ordered), after placing an order. Please allow additional shipping time to get to your local distributor.
b Number of products we can process for one order is 1 to 20 units. For quantities of 21 or more pieces, we need to quote price and lead time.
c Keyways are made according to JIS B1301 standards, Js 9 tolerance.d For products having a tapped hole, a set screw is included.
[Caution on J series]
We welcome your requests for
For details, see page VI.
Custom GearsCustom Gears
Best ever quality in a Stock Rack series!
562