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USATOLERANCE
®
RINGS
AutomotiveABS Toner RingsSteering Column Anti-Theft DeviceTiming Sprocket Camshaft ConnectionAlternator BearingsBlower Motor Bearings
Power ToolsSawsSandersRouters
Electric MotorsBearings in HousingsBearings on ShaftsPhenolic Brush HolderRotor Tachometers on ShaftsFans
PumpsCeramic Bearings and SleevesImpellersBearings
Lawn and GardenRototiller Knob MountsString Trimmer Bearing MountsLawn Mowers
Steering ColumnAnti-Theft Device
Bearing Mountin Alloy Housing
String Trimmer Gear Box
Brush Holder
Impeller on Shaft
3Check out our website! www.usatolerancerings.com
The Company
Met any good TOLERANCE RING companies lately?Never heard of a TOLERANCE RING? We’re USATOLERANCE RINGS—an exceptional company; anexceptional product! We’ve been meeting design needsfor American industry since 1961. Our customersinclude manufacturers of automobiles, home appli-ances, power tools, electric motors, and computer diskdrives as well as many others.
TOLERANCE RINGS are tough enough to be an antitheft device on a steering column, but delicate enough tocenter a miniature ball bearing in a disk drive.
Our company is as flexible as our product. We respondto customers, large and small, with efficient, courteousservice; with reliable and cost-effective solutions to designneeds; with rapid turnaround of sample parts and withdevelopment testing in customer components. Our facilityin West Trenton, New Jersey, along with our Europeanaffiliate in the United Kingdom, offers parts produced involume to levels of extraordinary accuracy and consistency.USA TOLERANCE RINGS is the singular source forTOLERANCE RINGS in North America.
Join the ranks of the hundreds of engineers, who, whenconfronted with a design problem made the happy discov-ery of USA TOLERANCE RINGS—an exceptional company;an exceptional product.
USATOLERANCE
®
RINGS
Table of Contents
Introduction .................................................................4Manufacturing Process .................................................5Common Uses of Tolerance Rings .................................6
Mounting Bearings ....................................................... 6Torque Transfer ............................................................ 6Differential Thermal Expansion ................................... 7Component Fastening .................................................. 7Reclamation of Bad Parts ............................................. 7
Types of Tolerance Rings ..............................................8AN Style ........................................................................ 8ANL Style ...................................................................... 8BN Style ........................................................................ 9
Types of Mounting ...................................................... 10Centered Arrangement ............................................... 10Piloted (Half-Centered) Arrangement........................ 10Free Arrangement ...................................................... 10
Design of Mating Parts ............................................... 9Assembly Procedure Considerations ............................ 9Operating Principle ..................................................... 11Part Identification ...................................................... 12Application Examples ..................................................17AN Series Data ........................................................... 13Bearing and ANL Series Data ...................................... 14BN Series Data ........................................................... 15New Project Information Sheet ................................... 16
USA TOLERANCE RINGS 85 Route 31 North Pennington, New Jersey 08534 Toll Free: 1-877-865-7464 Telephone: 609-745-5000 Fax: 609-745-5012
4
USATOLERANCE
®
RINGS
Introduction
Tolerance Rings are highly engineered frictional fasteners used to economically join mating cylindrical parts. Manu-factured from high quality spring steel or stainless steel strip, Tolerance Rings are widely accepted as a fastening devicecapable of handling torque transfer, axial retention and radial loading between mating machine parts.
Technical and economical advantages ensured by use of Tolerance Rings include:
Rapid, low cost assembly
Wider dimensional tolerance of mating diameters for interference fits
Compensation for ∆ thermal expansion between mating materials
Elimination of keys, pins, adhesives, D-shafts, threads and splines
Compensation for small amounts of misalignment of up to 1/2° draft angle
Infinite rotational indexing of parts prior to assembly
Modification to spring rates/critical frequencies of assemblies
5Check out our website! www.usatolerancerings.com
Custom Design Flexibility
Many non-catalog parts are available from inventoryand thousands of additional configurations can be madewith Standard Tooling and Standard Materials! Whyconsider a special? When radial or torque capacity of astandard ring does not meet application requirements,specials are ECONOMICAL alternatives. Yes, even ifcatalog ratings are 10 times too high or 10 times too lowwe often can vary the stiffness by an order of magnitudesimply by substituting different thicknesses of material orby adjusting the pitch which provides more or less corru-gations in a ring. Therefore, if catalog stated values areonly a fraction of what you need, call us for special designconsiderations. Simply have information per your DesignSpecifications form handy to speed along our response.
A Glimpse ofOur Manufacturing Process
1. Begin with a strip of material of proper thickness,cut to the proper width.
2. Run the material through our tooling disks whichlook like special gears. This tooling determines thespacing between the corrugations (pitch), the widthof the corrugations, and the corrugation height (byadjusting the centerline distance between the disks.)
3. Measure a length of corrugated strip appropriate forcircumference, then cut and roll it.
It is simple to corrugate different material thicknesseson a given set of tooling, or to cut different lengths ofcorrugated strip to accommodate various diameters. Ourlimitations are that with a given pitch we have finitetooling widths available. Reference the chart on page 13 todetermine the ring widths available. The width values aredependent on the pitch, not the diameter of the ring.
6
USATOLERANCE
®
RINGS
Mounting Bearings
Tolerance Rings are ideally suited for mountingbearings since traditional installations require housing andshaft diameters to be held within a tolerance range of about0.0005". Shaft or housing tolerances may be increased to.002", even up to .006" on larger diameters.
Care should be taken to examine worst-case loadingconditions, such as acceleration on start-up or impactloading and overloads, since the Tolerance Ring torquecapacity should not normally be exceeded. If torquecapacity is exceeded and slippage occurs, degradation ofperformance may result.
Common Uses of Tolerance Rings
Torque Transfer
Tolerance Rings are used successfully to transmittorque from one cylindrical component to another.
Examples include mounting impellers, gears, sprocketsand pulleys to shafts. The same advantages as describedearlier apply for torque transfer applications—broadermachining tolerances, elimination of set screws, adhesives,knurls, D-shafts and nuts. In some cases even splines maybe replaced with a Tolerance Ring.
Housing and Bearing
Tolerance Rings used as anti-theft devicesin steering columns.
In special designs where slow rotational speeds of shortduration and a broad break-away torque range are acceptable,the Tolerance Ring may replace shear pins, providingoverload protection. These applications should be reviewedby our engineering department.
When torque and radial loading must be handledsimultaneously, consult our Engineering Staff forrecommendations.
7Check out our website! www.usatolerancerings.com
With Tolerance Ring
Without Tolerance Ring
Temperature F°
Pres
sing
For
ce lb
s.
100 150 200 250
100
300
500
Component Fastening
Tolerance Rings are employed as fasteners for applica-tions such as the installation of knobs onto shafts andbrush holders into electric motor housings. ToleranceRings provide positive retention and allow for infiniterotational indexing prior to assembly.
Knob
Mounting ABS Toner Rings
Brush Holder
Reclamation of Bad Parts
Tolerance Rings are used to salvage worn housing boresor bores that have been accidentally machined oversized.Note that housing bores must be re-machined to appropriatediameters to accommodate the Tolerance Ring.
Differential Thermal Expansion
Tolerance Rings are used with great success incompensating for differential thermal expansion of matingparts. Examples include aluminum housings with steelbearings, silicon carbide bushings and sleeves mated to steelhousing and shafts, and glass-filled plastic impellers to shafts.Tolerance Rings maintain retention and minimum torquevalues, and may accommodate wide variations in diameterwithout overstressing brittle components.
The graph above illustrates the superior performance ofthe Tolerance Ring in retaining a 2" diameter ball bearing inan aluminum housing. With .0012" traditional interferencefit, an installation force of 500 lbs. is required. The bearingbecomes loose at a temperature of 170°F. With the ToleranceRing, an initial installation force of only 320 lbs is required,and retention remains high at 230 lbs. even at 270°F!
8
USATOLERANCE
®
RINGS
Actuator Arm Bearing
ShaftTOLERANCE RINGTypes of Tolerance Rings
Tolerance Rings are made in three varieties: AN, ANL,and BN. The appropriate ring for your application willdepend on such factors as assembly procedure, which partis a “nominal” diameter, and which part may be morereadily modified to accept the Tolerance Ring in the design.
Tolerance Rings Mount Bearingsin Disk Drive Actuator Arms
ANL StyleThe ANL style may be described as a very light duty AN
style ring. It is often characteristic of this ring to not havea circular shape in the free state.
AN StyleThe AN style ring is “open” in the free state so that when
installed inside a bore the ring will conform to that bore andbe self retaining. If used with the centered or half-centeredarrangement no further handling of the ring is necessaryduring assembly of the mating machine parts. When usedwith the free arrangement, the ring must be supported axiallyduring assembly of the mating machine parts.
The AN style is cut to length so as to fit outside a“nominal” circumference. Examples for use of the AN styleinclude mounting a bearing outer race, or mounting a fanor pulley to a shaft of common inch or metric diameter.
Corrugations faceinward on AN andANL rings. Corruga-tion heights rangefrom .014" to .0394"for most rings.
Designed for light duty, ANLrings have .014" corrugationheight standard and use .004"thick material.
9Check out our website! www.usatolerancerings.com
Blower Wheel
BN StyleBN style rings have a free-state diameter smaller than the
shaft diameter over which they are to be installed, so thatwhen mounted to the shaft the rings conform to and becomeself-retaining on the shaft. If used with the centered or half-centered arrangement, the ring will snap into the groove andno further handling of the ring is necessary. If used with thefree arrangement, the ring must be axially supported duringassembly of the mating parts.
The BN ring is cut to fit inside a nominal circumfer-ence. Examples for use of the BN ring include mounting abearing inner race to a shaft, or assemblies in whichmodification of the shaft is more practical than modifyingthe bore of the outer member.
Irw
tdnsT“
The free-state shape of theBN ring may be overlappedor may have a slight gap,but the ring should alwaysbe self-retaining to thespecified shaft diameter.
Corrugations point outwardin the BN style. Corruga-tion heights are .0196" to.0394" for most rings.
▼
▼
Design of Mating PartsAssembly Procedure Considerations
The “tops” of the corrugations (The I.D. on AN stylerings, or the O.D. on BN rings) are formed with a roundedcontour, which assists as a lead-in edge during assembly.It is very important that the lead-in edge of the mating partis contoured with a generous radius or a shallow (15°)chamfer. Sharp corners on the lead-in edge could dig inand mar the Tolerance Ring, sacrificing performance.
Best results of assembling mating parts are achieved byusing an arbor press and fixturing the parts to hold themsquarely in place during assembly. Except for very lightduty rings, aligning the parts by hand and/or hammeringthe assembly together jeopardizes alignment and perfor-mance. If misalignment occurs during assembly, there is atendency for the lead-in edge of the mating part to flattencorrugations in one area of the Tolerance Ring, resulting inreduction of ring integrity.
re = .010 max for dia < 2" = .020 max for dia > 2"bmin = (3 x re) + ring width
Groove in shaft O.D. Groove in housing bore
When using the centered arrangement, a small radius andadequate groove width should be used to ensure that theTolerance Ring may be properly seated on the cylindricalsurface.
Radius or chamfer areoptions for part whichslides on corrugationsduring assembly.
Misalignment as shownwill cause flattening ofcorrugations in thiscircumferential portion ofthe ring.
Keep Alignment True
re
b
re
b
15°
10
USATOLERANCE
®
RINGS
FREE PILOTED CENTERED
Step
ped
Dia
met
er
Gro
oved
Dia
met
er
Types of Mounting
Centered ArrangementThis arrangement provides a groove in the housing for
AN rings or a groove in the shaft for BN rings. These groovescapture the ring axially on both sides and simplify assembly.When the shoulder (stepped) diameter is held close to thenominal diameter, the following advantages occur:
• Improved alignment of parts during installation
• Improved concentricity due to low radial clearance atthe shoulder
• Excessive radial loads and shock loads can be accom-modated since the Tolerance Ring is protected in itsown cavity. The corrugations will deflect until theshoulder or stepped diameter contacts the matingmember. Additional loading will be transmittedthrough the step, and will not act to further deflector crush the corrugations.
AN Ring Mounting Arrangements
Free ArrangementThis arrangement will not provide axial support to the
ring in either direction, so the assembly machine must befixtured to “back up” or axially locate the ring temporarilywhile the mating components are assembled. The Toler-ance Ring will be subjected to all radial loading and shouldbe selected with appropriate capacity.
Piloted (Half-Centered) ArrangementThis arrangement is similar to the centered configura-
tion, at a lower cost. With the exception of piloting foralignment, this method may provide the advantages of thecentered arrangement when the stepped diameter is heldclose to the nominal diameter of the mating component.
Brush Holder
11
USATOLERANCE
®
RINGS
(G1 + G2) /2G1(tightest fit)
G2(loosest fit)
0
TC at G1
Diametral Gap (in)
Torq
ue
(in
-lb
s)Radial
Capacity
TorqueCapacityRad
ial
Capac
ity
0
RC
Rad
ial
Cap
acit
y(l
bs)
Operating Principle
Tolerance Rings work on the two physics principles ofsprings and friction.
Spring Formula: F = kxwhere F = force required to compress the spring (lbs or N) k =spring rate (lbs/in or N/m) x = distance the spring is compressed (inches or m)
Friction Formula: Ff = cN
where Ff = friction force opposing movement (lbs or N) c = coefficient of friction N = force which is perpendicular to the surface.
Each corrugation (“wave” or “bump”) on a ToleranceRing acts like a stiff radial spring. We can calculate thespring rate, k, specify the deflection, x, and estimate thecoefficient of friction. All this, coupled with limits relatedto yield strength of the material, permits us to estimatethe assembly forces, torque, and radial load capacities of aTolerance Ring.
The load capacities, both torque and radial, vary withthe amount of interference. Radial capacity is related tothe yield limits of the material, the cumulative compres-sion of the corrugations caused by interference fit plusexternally applied radial loads, and the preload caused bythe interference fit. Torque capacities are related to theamount of interference and coefficient of friction.
The graph below summarizes the capacities in practi-cal terms. G1 represents the minimum diametral gap(smallest space, tightest fit) and G2 represents the maxi-mum diametral space (biggest gap, loosest fit). Torquecapacity is maximum in the tightest fit at G1 and drops tominimum at the loosest fit at G2. Radial capacity is atmaximum value throughout the top half of the interfer-ence range (due to a preload effect), but drops linearly(right to left on the curve) from the midpoint to thetightest fit at G1.
The Curve Demonstrates that Maximum Torque Values andMaximum Radial Capacities Cannot Exist Simultaneously.
Load capacities as related to the amount of interference fit.
12Check out our website! www.usatolerancerings.com
SIZE RANGE OF STANDARD RINGS
In: 1/4, 5/16, 3/8, 7/16, 1/2, 5/8mm: 5, 6
In: 1/4, 5/16, 3/8, 1/2, 5/8, 3/4mm: 4, 5, 6, 8
mm: 4, 5, 6, 7, 8, 10, 14, 15This Pitch is ANL Version Only
In: 1/4, 3/8, 1/2, 5/8, 3/4, 1, 1-1/8mm: 6, 7, 8, 9, 10, 13, 16, 22
In: 1/4, 3/8, 1/2, 5/8, 3/4, 7/8, 1,1-1/4, 1-1/2
mm: 7, 10, 11, 12, 13, 14, 15,16, 17, 18, 19, 20, 21, 30
mm: 10, 15, 16
mm: 19, 21
In: 1/2, 5/8mm: 12
.059"1.5 mm
.0984"2.5 mm
.1236"
.1378"3.5 mm
.1968"
5 mm
.248"6.3 mm
.2953"7.5 mm
.370"9.4 mm
.006"
.15 mm
.008"
.2 mm
.004"
.1 mm
.012"
.3 mm
.016"
.4 mm
.020"
.5 mm
.024"
.6 mm
.028"
.7 mm
DiameterRange
MaterialThicknessPitchRing Widths Available
Inch .18 / .29mm 4.5 / 7.5
Inch .31 / .73mm 8 / 18
Inch .5+mm
Inch .70 / 1.23mm 19 / 30
Inch 1.25+
mm 32+
Inch 2+mm 52+
Inch 3+mm 82+
Inch 5+mm 125
Part Identification ChartBN
AN 125
5 X
2
C
S
6
075
DESIGNATESSPECIAL DESIGN
MATERIAL:S = 301 Stainless SteelC = Carbon SteelH = HastelloyM = Monel
➤ ➤ ➤ ➤ ➤ ➤
SERIES:AN, ANL, BN
DIAMETER:mm or x.xx"
INCH SERIES = blankMETRIC SERIES = X
WIDTH:mm or x.xx"
SAMPLE PART NUMBER IDENTIFICATION:BN 5 X 6 C BN series, 5 mm DIA, 6 mm width, carbon steelAN 125075 S2 AN series, 1-1/4" DIA, 3/4" width, stainless, special
13Check out our website! www.usatolerancerings.com
AN Series
0.2360.2500.2360.2500.2500.2500.2500.2500.7500.2500.1970.2500.2360.2500.2760.5000.5000.4720.5000.5120.5000.5000.4330.5000.5000.4720.5000.5120.5000.5510.5000.500
0.1570.1880.2360.2500.3130.3750.4380.5000.5000.6250.6300.6880.7480.7500.8660.8751.0001.1021.1251.1811.2501.3751.3781.5001.5631.5751.6251.6541.7501.8501.8752.000
4 mm3/166 mm1/45/163/87/161/21/25/8
16 mm11/1619 mm
3/422 mm
7/81
28 mm1 1/8
30 mm1 1/41 3/8
35 mm1 1/21 9/1640 mm1 5/8
42 mm1 3/4
47 mm1 7/8
2
0.1950.2260.2740.2890.3700.4330.4950.5580.5580.6830.6880.7460.8260.8280.9440.9531.0781.1811.2031.2591.3281.4531.4561.5781.6411.6531.7031.7311.8281.9281.9532.097
0.1560.1870.2350.2490.3120.3740.4370.4980.4980.6230.6280.6860.7460.7480.8640.8730.9981.1001.1231.1791.2481.3731.3761.4981.5611.5731.6231.6521.7481.8481.8731.998
0.1950.2260.2740.2890.3700.4330.4950.5580.5580.6830.6880.7460.8260.8280.9440.9531.0781.1811.2031.2591.3281.4531.4561.5781.6411.6531.7031.7311.8281.9281.9532.097
0.0320.0320.0320.0320.0480.0480.0480.0480.0480.0480.0480.0480.0660.0660.0660.0660.0660.0660.0660.0660.0660.0660.0660.0660.0660.0660.0660.0660.0660.0660.0660.080
0.0390.0390.0390.0390.0580.0580.0580.0580.0580.0580.0580.0580.0780.0780.0780.0780.0780.0780.0780.0780.0780.0780.0780.0780.0780.0780.0780.0780.0780.0780.0780.098
2023304565
190230270810320250370420440550
12001300133014401400
8901040
820110011001000120012001200140013001100
0.1900.2190.2690.2830.3620.4240.4870.5490.5490.6740.6780.7370.8140.8160.9320.9411.0661.1681.1881.2471.3161.4411.4441.5661.6291.6411.6911.7201.8161.9161.9412.082
0.1920.2210.2700.2850.3640.4260.4890.5520.5520.6770.6820.7400.8170.8190.9350.9441.0691.1711.1921.2501.3201.4451.4481.5701.6331.6451.6951.7241.8201.9201.9452.087
0.1930.2240.2730.2870.3680.4300.4920.5550.5550.6800.6850.7430.8230.8250.9410.9501.0751.1771.1991.2561.3241.4491.4521.5741.6371.6491.6991.7271.8241.9241.9492.092
dnominal
d(in)
w2(in)
PARTNUMBER
d min(in)
D max(in)
RADIALCAPACITY
(lbs)
DIAMETRAL2
CLEARANCE
TYPICAL BOREFOR BEARING
MOUNT
1. See SIZE RANGE OF STANDARD RINGS chart on page 13 for other widths which are available. Radial load and torque capacities are generally proportional to width. Performance is influenced bydesign of mating components and assembly procedures - actual capacities may vary from the stated values. For sizes or load requirements other than shown, contact our Engineering Department forrecommendations.
2. Diametral clearance or Diametral Gap is the void where the Tolerance Ring fits (mathematically represented by D-d) The size of this gap determines the amount of interference fit. G1 and G2 aredesign limits.
3. Torque capacity is dependent on fit. Torque Capacity @ G1 is the expected torque capacity at the tightest fit allowable. TC is the expected minimum torque transfer capacity at the Typical Bore ForTorque diameter range (which occurs with Dmax).
AN4X8CAN018025CAN6X6CAN025025CAN031025CAN037025SAN043025SAN050025SAN050075SAN062025SAN16X5SAN068025SAN19X6SAN075025SAN22X7SAN087050SAN100050SAN28X12SAN112050SAN30X13SAN125050SAN137050SAN35X11SAN150050SAN156050SAN40X12SAN162050SAN42X13SAN175050SAN47X14SAN187050SAN200050S
G2(in)
G1(in)
D max(in)
D min(in)
D min(in)
D max(in)
TYPICAL BOREFOR TORQUE
3469
11212550
1507558
10098
115220325425525530640530650550795860835940890
1110136012401175
23447
151825753730506070
135200260325330390410500290420460445500475590720660675
TORQUECAPACITY
@ G13
(in-lbs)TC
(in-lbs)
d
W
dD
Freearrangement
Centeredarrangement
14
USATOLERANCE
®
RINGS
Bearing & ANL Series
PARTNUMBER
BRG WW
(in)
BRG O.D.d
(in)BEARINGNUMBER
TYPICAL BOREFOR BEARING
MOUNT
R2R3R43435
38/608R6
60006001R8
62006201
6202/6300630162036302
6204/63036205/63046206/63056305W6207630662086307620962106308621163096212
31/25/8
16 mm19 mm22 mm
7/826 mm28 mm1-1/8
30 mm32 mm35 mm37 mm40 mm42 mm47 mm52 mm62 mm62 mm72 mm72 mm80 mm80 mm85 mm90 mm90 mm100 mm100 mm110 mm
00.50000.62500.62990.74800.86610.87501.02361.10241.12501.18111.25981.37801.45671.57481.65351.85042.04722.44092.44092.83462.83463.14963.14963.34653.54333.54333.93703.93704.3307
00.19600.19600.19690.23620.27560.25000.31500.31500.25000.35430.39370.43310.47240.47240.51180.55120.59060.62990.90550.66930.74800.70870.82680.74800.78740.90550.82680.98430.8661
30.5580.6830.6880.8260.9440.9531.1011.1811.2031.2591.3381.4561.5351.6531.7311.9282.1452.5382.5382.9132.9133.2273.2273.4253.6213.6214.0544.0154.409
00.5550.6800.6850.8230.9410.9501.0981.1771.1991.2561.3341.4521.5311.6491.7271.9242.1402.5332.5332.9102.9103.2243.2243.4223.6183.6184.0514.0124.406
1180250250420550580770840720980670820900
1000120014001600200036002900360032504000430045505350510065506525
RADIALCAPACITY
(lbs)PART
NUMBER
BRG WW
(in)
BRG O.D.d
(in)
TYPICAL BOREFOR BEARING
MOUNT
631062136311621462156312621663136217631462186315631663176318
110 mm120 mm120 mm125 mm130 mm130 mm140 mm140 mm150 mm150 mm160 mm160 mm170 mm180 mm190 mm
4.33074.72444.72444.92135.11815.11815.51185.51185.90555.90556.29926.29926.69297.08667.4803
1.06300.90551.14170.94490.98431.22051.02361.29921.10241.37801.18111.45671.53541.61421.6929
4.4094.8024.8024.9995.1965.1965.5905.5905.9835.9836.3776.3776.7707.1647.558
4.4064.7994.7994.9965.1935.1935.5875.5875.9805.9806.3746.3746.7675.1617.555
AN110X25S9AN120X22S9AN120X25S9AN125X22S9AN130X25S9AN130X31S9AN140X25S9AN140X33S9AN150X25S9AN150X33S9AN160X25S9AN160X33S9AN170X39S9AN180X39S9AN190X39S9
BEARINGNUMBER
2R3R434
2110435
608/38608/386203
31/25/8
16 mm11/1619 mm22 mm22 mm40 mm
000.50000.62500.62990.68750.74800.86610.86611.5748
20.19600.19600.19690.31250.23620.27560.27560.4724
00.5270.6520.6570.7160.7750.8920.8921.602
80.5250.6500.6550.7140.7730.8900.8901.600
71907190795074808550
105009200
122009950
130001055013950172501900020500
RADIALCAPACITY
(lbs)PART
NUMBER
BRG WW
(in)
BRG O.D.d
(in)BEARINGNUMBER
2688
1110132145
ANL RINGS
1. Recommended bore sizes assume no differential thermal expansion (going looser). Radial Capacity is astatic load rating.
2. USA Tolerance Rings may also be used to mount inner bearing races to shafts (BN series). Pleasecontact our engineers to review these applications since they usually involve cyclical loading rather thanstatic loads.
3. These part numbers are for “Free Arrangement” mounting configurations (REF p. 10). Assemblies usingnarrow, light-duty rings and a centered arrangement benefit from lighter assembly forces while stillpreventing bearing race rotation. Consult our Sales or Engineering Department for recommendations.
dNominal
AAN12.7X5SAN16X5SAN16X5SAN19X6SAN22X7SAN087025SAN26X8SAN28X8SAN112025SAN30X9SAN32X10SAN35X11SAN37X12SAN40X12SAN42X13SAN47X14SAN52X15SAN62X16SAN62X23S9AN72X17S9AN72X19S9AN80X17S9AN80X20S9AN85X19S9AN90X20S9AN90X22S9AN100X21S9AN100X25S9AN110X22S9
D min(in)
D max(in)
RADIALCAPACITY
(lbs)d
nominal D min(in)
D max(in)
D min(in)
D max(in)
TYPICAL BOREFOR BEARING
MOUNT
AANL12.7X5SANL16X5SANL16X5SANL17.5X8SANL19X6SANL22X7SANL22X10SANL40X12S
dnominal
dD
Freearrangement
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0.1500.1600.2000.2130.2560.2590.3200.3390.4170.4450.5080.5350.5700.6140.6320.6750.7130.8000.8620.9100.9251.0501.1071.1121.1751.3011.3041.4261.5011.5511.6761.926
BN Series
0.2500.2360.2360.2500.2500.1970.2500.2760.1970.2500.2500.2360.2500.4720.3750.5000.4720.5000.5000.4720.5000.5000.5120.8750.7500.6880.6690.7500.5511.0001.0001.000
0.1880.1970.2360.2500.3130.3150.3750.3940.4720.5000.5630.5910.6250.6690.6880.7500.7870.8750.9380.9841.0001.1251.1811.1881.2501.3751.3781.5001.5751.6251.7502.000
3/165 mm6 mm1/45/168 mm3/8
10 mm12 mm
1/29/16
15 mm5/8
17 mm11/163/4
20 mm7/8
15/1625 mm
11 1/8
30 mm1 3/161 1/41 3/8
35 mm1 1/2
40 mm1 5/81 3/4
2
0.1490.1590.1980.2110.2540.2570.3170.3360.4140.4420.5050.5320.5670.6110.6290.6720.7100.7970.8590.9070.9221.0471.1041.1091.1721.2971.3001.4221.4971.5471.6721.922
0.1490.1590.1980.2110.2540.2570.3170.3360.4140.4420.5050.5320.5670.6110.6290.6720.7100.7970.8590.9070.9221.0471.1041.1091.1721.2971.3001.4221.4971.5471.6721.922
0.1890.1980.2370.2510.3140.3160.3760.3950.4730.5010.5640.5920.6270.6710.6900.7520.7890.8770.9400.9861.0021.1271.1831.1901.2521.3771.3801.5021.5771.6271.7522.002
0.0320.0320.0320.0320.0480.0480.0480.0480.0480.0480.0480.0480.0480.0480.0480.0660.0660.0660.0660.0660.0660.0660.0660.0660.0660.0660.0660.0660.0660.0660.0660.066
0.0390.0390.0390.0390.0580.0580.0580.0580.0580.0580.0580.0580.0580.0580.0580.0780.0780.0780.0780.0780.0780.0780.0780.0780.0780.0780.0780.0780.0780.0780.0780.078
505085
10555
125190200200240240270300640510880840
100011251100120013001400250012001170122015001200220024002700
0.1530.1620.2010.2150.2620.2640.3230.3420.4200.4480.5110.5390.5730.6170.6360.6810.7180.8060.8690.9150.9311.0561.1121.1191.1811.3051.3081.4301.5051.5551.6801.931
0.1550.1640.2030.2170.2640.2660.3260.3450.4230.4510.5140.5420.5760.6200.6390.6840.7210.8090.8720.9180.9341.0591.1151.1221.1841.3091.3121.4341.5091.5591.6841.934
Dnominal
D(in)
W1
(in)PART
NUMBERd min(in)
D max(in)
DIAMETRAL2
CLEARANCE
TYPICAL O.D.FOR BEARING
MOUNT
TYPICAL O.D.FOR TORQUE
d max(in)
d min(in)
d max(in)
d min(in)
1.822485
121718212830389280
120110185245170245315340700450410415595450955
11151775
3347
119
21243137474975
185160200175300405275400515550
1150740770785
1120850
180021002900
TORQUECAPACITY
@ G13
(in-lbs)
RADIALCAPACITY
(lbs)
BN018025CBN5X6CBN6X6CBN025025CBN031025CBN8X5SBN037025SBN10X7SBN12X5SBN050025SBN056025SBN15X6SBN062025SBN17X12SBN068037SBN075050SBN20X12SBN087050SBN093050SBN25X12SBN100050SBN112050SBN30X13SBN118087SBN125075SBN137068SBN35X17SBN150075SBN40X14SBN162100SBN175100SBN200100S
G1(in)
G2(in)
1. See SIZE RANGE OF STANDARD RINGS chart on page 13 for other widths which are available. Radial load and torque capacities are generally proportional to width. Performanceis influenced by design of mating components and assembly procedures - actual capacities may vary from the stated values. For sizes or load requirements other than shown,contact our Engineering Department for recommendations.
2. Diametral clearance or Diametral Gap is the void where the Tolerance Ring fits (mathematically represented by D-d) The size of this gap determines the amount of interference fit.G1 and G2 are design limits.
3. Torque capacity is dependent on fit. Torque Capacity @ G1 is the expected torque capacity at the tightest fit allowable. TC is the expected minimum torque transfer capacity at theTypical Bore For Torque diameter range (which occurs with Dmax).
TC(in-lbs)
D
W
dD
Freearrangement
Centeredarrangement
16
USATOLERANCE
®
RINGS
NEW PROJECT INFORMATION SHEET
Date: Contact:
Company: Phone:
Address: Fax:
Description and Sketch of Current Application and Proposed Location of Tolerance Ring
Describe resons for considering Tolerance Rings.
USA Tolerance Ring to be mounted in Bore or on Shaft?
Describe Assembly Procedure.
Desired Performance
Torque: max. min.Axial force max. min.Radial force max. Cyclical load: _____Yes _____NoRadial runout max.Operating temperature max. min.
DimensionsShaft diameter(Inner) Tolerance: Wall thickness:Bore diameter (Outer) Tolerance: Wall thickness:Maximum width available for tolerance ring:Which dimensions can be changed?Which Mounting Configuration is preferred (Centered, Piloted, or Free?)
Material Of Mating ComponentsMaterial Hardness Coefficient of thermal expansion
Shaft(Inner Member)Housing (Outer Member)
Can materials be changed?
What Quality Standards are Required?
Estimated Annual Quantity?
Schedule: Competing SolutionsDesign to be Finalized by:Samples by:Production by:
Comments:
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Silicon Carbide Bushing and Sleeve in a Seal-less Chemical pump
USA Tolerance Ring in Ptu Heating/AC Unit
USATOLERANCE
®
RINGS
Housing grooved to accept ‘AN’ Style Tolerance Rings
Shaft grooved to accept ‘BN’ Style Tolerance Rings
‘AN’ Style Tolerance Ring
‘BN’ Style Tolerance Ring
HOUSING
SiC BUSHING
SiC SLEEVE
SiC BUSHING
SiC SLEEVE
SiC BUSHING
SiC SLEEVE
SiC BUSHING
SiC SLEEVE
Blower Wheel
Alternator Bearing Mount
Pulley on Shaft
Pump Bearing Mount
USA Tolerance Rings Mount Bearings