Flexible Shaft Couplings, Clutches and Collars€¦ · solid coupling will result in high shaft loading and significant bearing loads. In certain cases this misalignment is limited

Flexible Shaft Couplings, Clutches and Collars

Flex

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Section Contents

Couplings and Collars Overview ..........................................Page 82

ReliaFlex® Micro Couplings ....................................................Page 88

ReliaFlex® Precision Couplings, Set Screw Type ................Page 810

ReliaFlex® Precision Couplings, Clamp Type ......................Page 812

ReliaFlex® Couplings, ReliaGrip™ Clamp Type ................Page 814

Custom ReliaFlex® Couplings ................................................Page 816

Stocked ReliaFlex® Couplings................................................Page 817

Bellows Couplings ....................................................................Page 818

Flexible Disc Spring Couplings................................................Page 824

Oldham Couplings ....................................................................Page 830

Membrane Couplings ................................................................Page 832

Curved Jaw Couplings..............................................................Page 836

Micro Spiral Beam Couplings ..................................................Page 838

Spiral Beam Couplings ............................................................Page 839

Spiral Beam Stainless Steel Couplings ..................................Page 844

Radial Tooth Couplings ............................................................Page 846

Friction Clutches ......................................................................Page 847

Solid Couplings ........................................................................Page 851

Double Width Shaft Clamp Collars ..........................................Page 852

Shaft Clamp Collars ..................................................................Page 853

One Piece Threaded Collars ....................................................Page 854

One Piece Set Screw Collars....................................................Page 855

Technical Information................................................................Page T81

ProductOverview

82

Couplings and Collars

Contact us for product information, design support and custom [email protected] +44 (0) 1484 601002 www.reliance.co.uk

Couplings

and Collars

Introduction to the rangeIn many cases machine designers give limited thought to theshaft coupling. They devote their time to the more expensivecomponents, overlooking the fact that the performance of amachine is only as good as the connections of its shafts. Relianceis fully aware of the importance of the shaft coupling and that theyare often a critical part of the drive system. The Reliance range ofshaft couplings has been carefully designed and tested to providetrouble free operation over many millions of cycles.

Perfect alignment is not practical in applications where two shafts need to be joined and therefore somelevel of misalignment will always occur. This misalignment is usually the result of the support blockmanufacturing tolerances and structural alignment. Unless these tolerances are very precise use of asolid coupling will result in high shaft loading and significant bearing loads. In certain cases thismisalignment is limited to angular or radial misalignments, but is more often a combination of the two.Therefore, careful shaft coupling selection is important as differing configurations of coupling aredesigned to perform very differently dependent upon the application, and, as a consequence, have verydifferent benefits and drawbacks.

Reliance engineers have many years of experience working with and specifying shaft couplings and arevery happy to offer applications advice on coupling selection.

ReliaFlex®

The ReliaFlex® range of couplings is an aluminium alloy, one piece configuration, which has beendesigned inhouse at Reliance to provide very smooth transmission of motion, high torsional stiffness,low bearing loads, and long life. The patented slot pattern was developed after many months of analysisand test to provide the best balance between zero backlash, torsional stiffness and low bearing load,whilst attaining an operational life in excess of 50,000,000 cycles at rated load and 80% offset. With twosets of identical slots, the ReliaFlex® coupling is constant velocity by design and handles angular,parallel and axial offset. Available in sizes from 6 to 40 mm outside diameter and allowable speeds upto 70,000 rpm, the ReliaFlex® coupling provides a very reliable one piece coupling design thatapproaches the performance of a bellows coupling.

Also for customers that require a modified or completely bespoke ReliaFlex® coupling, Reliance hasdeveloped a unique computerbased design and performance prediction tool. This tool allows ourengineers to experiment quickly with different coupling configurations and to design a coupling to meeteither space envelope restrictions or performance requirements.

OldhamOldham couplings are ideal where high degrees of parallel misalignment are present, assembly accessis restricted and electrical insulation is required. Their construction of aluminium alloy hubs and nylonor acetal centre blocks allows separate assembly of hubs onto shafts and then simple engagement withthe centre block on assembly where shaft movement is restricted. In addition, the construction of thecentre block allows it to act as a torque limiter or overload device.

ProductOverview

83



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BellowsMaintenance free zerobacklash bellows couplings are available with three construction options: forhighest accuracy, nickel bellows; for torque transmission, stainless steel bellows; and where space isrestricted, bronze bellows are available down to 12 mm outer diameter. Shaft fixing options are both setscrew and clamp for the stainless steel and nickel bellows options, with the brass bellows optionavailable in clamp type only.

Flexible discA number of different options of flexible disc couplings are available, based on both single and doubledisc spring construction. Please note that single disc spring couplings should only be used where themisalignment between the shafts is restricted to angular and axial. Single disc spring couplings cannotbe used where radial misalignments are present. The RFSXK2213 and 3019 type uses a novel designwhich places the clamps inboard of the disc springs to give the shortest possible overall length. TheRFSXK3850 type has an extended centre piece which allows high radial misalignment capability whilstmaintaining good accuracy of transmission.

Curved jawCurved jaw couplings are available with both set screw and clamp hub type fixing methods. They arean ideal solution for reducing system torque ripple with a choice of three damping elements for high,medium and low torques.

Spiral beamAvailable in stainless steel or aluminium and with a clamp or set screw style fixing, spiral beamcouplings are suitable for general applications. Manufactured in one piece, spiral beam couplings arealso maintenancefree.

Friction clutchesFriction clutches are available with two spring types. For lower torques up to 30 Ncm, the wirecompression spring type should be used. For higher torques up to 120 Ncm, the disc spring version isthe ideal choice.

Radial toothRadial tooth couplings are self centering on assemblyand can be used to transmit high torques. Thesecouplings must not be used where radial and axialmisalignments are present and may require lightlubrication depending on the application conditions.

SolidStainless steel or aluminium solid couplings, in one ortwo piece construction, can be used for connecting twoaccurately aligned shafts. Screws are prevented fromloosening during operation by precision honed boresand Nypatch antivibration hardware, providingsuperior holding strength.

Bespoke coupling designed for amedical dosing machine

ProductOverview

84



Couplings

and Collars

ReliaFlex® Unique design,maximises torsional stiffnesswithout introducing highbearing loads. Chambered forease of assembly.

Bellows High accuracy, lightduty. Maintenance free.

Radial tooth Positiveconnection, minimal axialmisalignment.

Spiral beam Universal onepiece coupling. Aluminium andstainless steel versionsavailable.

Curved jaw Shockabsorbing, low cost generalpurpose coupling, ideal forreducing torque ripple.

Membrane Light duty, withan insulating fibreglassreinforced centre. Compactoverall length. Zero backlash.

Oldham Large offset,designed to separate forassembly. Electricallyinsulating disc.

Flexible disc spring Idealfor low torque applicationsrequiring accuracy. Bothexternal and internal hubsavailable.

Clamp collars No shaftmarking, integral location face.One or two piece construction.

Solid One and two pieceoptions. Excellent foraccurately aligned shafts withhigh torque loads.

Friction clutches Variabletorque settings. Gearmanufactured to requirement.

Custom Design Designedand manufactured to suit yourapplication, please contact us.

ProductOverview

85



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Coupling Feature

Coupling Style

Elec

tric

ally

insu

latin

g

Vibr

atio

n da

mpi

ng

Hig

h re

liabi

lity

No

inhe

rent

bac

klas

h

Torq

ue c

apac

ity

Mis

alig

nmen

t cap

abili

ty

Low

bea

ring

load

Acc

urac

y

Pric

e / p

erfo

rman

ce

ReliaFlex®

Bellows

Flexible disc spring* *

Oldham

Membrane

Curved jaw

Spiral beam

Radial tooth

Friction clutches

Solid

The couplings featured in this catalogue have been carefully selected to accommodate varyingdegrees of shaft misalignment whilst offering minimum distortion of rotation.

No one coupling provides a universal solution but the selection table below summarises the salientperformance features for ease of comparison.

Full details for each coupling can be found on the product pages, with further technical information onpages T81 to T84. If you require technical support please contact us to dicuss your application andwe will be happy to help you select an appropriate coupling.

Comparative star rating:most suitableleast suitable

not applicableplease enquire

*single disc suitable for angular offset only

ProductOverview

86

ReliaFlex® Couplings


Couplings

and Collars

•• Extend system lifeThe ReliaFlex® coupling introducesnegligible radial and axial bearingloads, extending system life.

• Improve system accuracyThe ReliaFlex® coupling provides excellentkinematic transfer of motion with high torsionalstiffness, zero backlash and constant velocity.

ReliaFlex®, specifically designed and manufactured by Reliance to:

Clampor

Set screw

• Clamp type leaves shafts unmarked• Set screw type where higher speeds are required

Electricallyinsulated

• Protects delicate instruments from powered drive• Available with selected bores on RCL type aluminium couplings, sizes 20

and 25

Customdesigns

• Predictable performances• Available with outer diameters from 6 to 40 mm• Alternative materials may be specified

Please enquire

Please enquire

Shortor

Long

• RCS type (short) where space is limited• RCL type (long) where greater parallel offset and greater accuracy are

required

ReliaGrip™

• The ReliaGrip™ clamp enables ReliaFlex® coupling to be used to itsfull potential. Greater torques can be transmitted without the need to useset screws, which can potentially damage the shaft

Precisionor

Micro

• Precision coupling with outer diameters from 13 to 25 mm• Micro coupling with outer diameters from 6 to 10 mm

The range of ReliaFlex® flexible shaft couplings

UK Number 2316735US Number 6,203,437 B1European Number EP 0922168 B1Japanese Number 4,083,227

Patented ReliaFlex®

ProductOverview

87

ReliaFlex® Couplings


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With the latest advances in digital optical scanning speed, professional flatbed scanner manufacturersare demanding more accuracy from their drive systems. A European company with leading edgetechnology in drum and flatbed scanners, image setting and integrated media processor productsuses ReliaFlex® couplings in all their flatbed products. With XY technology, speeds of up to 50 scansper hour and resolutions of up to 5400 dpi, the accuracy and reliability of the ReliaFlex® couplingmakes it the ideal choice.

Prior to the introduction of the ReliaFlex® coupling slight variations in the speed of the CCD elementcaused errors when trying to capture high resolution images. These errors manifest themselves as acolour registration defect, which resulted in an unacceptable banding effect across the image.Although these errors were small (typically 3.0 microns) they could easily be detected by the nakedeye.

The cause of these errors was identified as the flatbed drive system. Introduction of a ReliaFlex®

coupling manufactured from low inertia Grade 7075T6 Aluminium was instrumental in bringing theseregistration defects under control. The unique slit pattern with radial rather than spiral slits gives theReliaFlex® coupling high torsional stiffness and unsurpassed accuracy. However, with ReliaFlex®

couplings high torsional stiffness does not mean high bearing loads, the ReliaFlex® coupling slitpattern has been carefully designed to give low bearing loads in conjunction with its high torsionalstiffness.

Having been tested to 50 million cycles at rated torque, the ReliaFlex® coupling is also ideal for highduty cycle applications such as busy printing and typesetting applications. All in all the ReliaFlex®

coupling has proved itself to be ideal for accurate positioning and responsive servo systems.

Picture perfect scanning with ReliaFlex® coupling

1.5 5 mmBore

88

Micro ReliaFlex® Couplings


Couplings

and Collars

Associated ProductsShafts: page 112

Bearings: page 121Leadscrews: page 71

Intelligent motors: page 22

All dimensions in mmGeneral tolerances ±0.13 mmMaterial: Aluminium alloy grade 7075T6Finish: Alocrom 1000

Part number selection table

Example Part No: RCS A 8 42 Dimensions(mm)

BasicPartNo

Material Size Standard Bore SizesØB1 and ØB2

(bore tolerance +0.010/0.000)

O/D

ØD

Length

L

HubLength

E

FittedScrew

RCS(short) A

68

10

1.5 22

333

44 5

6.08.0

10.0

9.3511.7013.65

2.803.204.00

M1.2*M1.6M2

RCL(long) A

68

10

1.5 22

333

44 5

6.08.0

10.0

12.5014.5017.00

2.803.204.00

M1.2*M1.6M2

Maximum shaft intrusion when fitted = E+2 mm.* Coupling fitted with stainless steel slotted head set screws.Note: bores may be left unalocromed.

RCL (long type) RCS (short type)

Product options• Alternative bore sizes• Imperial bores• Alternative materials• Custom designs see page 816• Product overview see pages 82 to 87• Selected items in stock, at reduced prices see page 817

1.5 5 mm Bore

89

Micro ReliaFlex® Couplings


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BasicPartNo

Material Size Torsional1

StiffnessNm/rad

RadialCompliancemicrons/N

Misalignment MaxInertiagcm2

MaxMass

gParallel

mmAngular

degAxialmm

RCS(short) A

68

10

4.198.70

16.80

21.035.028.0

±0.02±0.05±0.06

±1.7±2.0±2.0

±0.06±0.10±0.17

0.030.110.33

0.651.272.34

RCL(long) A

68

10

4.308.70

16.81

79.0102.0

83.0

±0.04±0.10±0.12

±1.7±2.0±2.0

±0.06±0.10±0.17

0.050.150.43

0.951.663.05

Specifications vary according to bore size. For exact figures, please enquire.1 Typical torsional stiffness.

BasicPartNo

Material Size Typical Torque Capacity MaxSpeedrpm

ReversingNm

Non ReversingNm

PeakNm

RCS(short) A

68

10

0.100.200.30

0.150.300.45

0.250.500.75

70,00040,00035,000

RCL(long) A

68

10

0.100.200.30

0.150.300.45

0.250.500.75

32,00024,00022,000

Specifications vary according to bore size. For exact figures, please enquire.

Technical specification

Torque and speed capacity

Technical support• Zero backlash, reliable onepiece construction• Unique design maximises torsional stiffness without

inducing high bearing loads• Minimal velocity and positional fluctuations• Over 50,000,000 test cycles at rated load and 80% offset

without failure• Maintenance free• Recommended temperature range 80ºC to +80ºC• Technical information see page T81• Installation information see page T83

3 20 mm Bore

810

ReliaFlex® Precision Couplings Set Screw Type


Couplings

and Collars

Couplings are chambered for ease of assembly and fitted with stainless steel screws.


Maximum shaft intrusion when fitted = E+2 mm. Note: bores may be left unalocromed.


Example Part No: RCS A 20 85 Dimensions(mm)

BasicPartNo



O/D

ØD

Length

L

HubLength

E

FittedScrew

RCS(short) A

131620253040

3 44

555

6666

8888

10101010

121212

1515 20

13.016.020.025.030.040.0

16.8019.7521.5025.8030.3035.95

5.005.906.607.609.10

10.60

M2.5M3M4M5M6M8

RCL(long) A

131620253040

3 44

555

6666

8888

10101010

121212

1515 20

13.016.020.025.030.040.0

20.0023.5026.0034.0044.0057.00

5.005.906.607.609.10

10.60

M2.5M3M4M5M6M8





Product options• Alternative bore sizes• Imperial bores• Alternative materials• Electrically insulated, sizes 20 and 25• ReliaGrip™ clamp type see page 814• Custom designs see page 816• Product overview see pages 82 to 87• Selected items in stock, at reduced prices see page 817

3 20 mm Bore

811

ReliaFlex® Precision Couplings Set Screw Type


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BasicPartNo


StiffnessNm/rad



MaxMass

gParallel

mmAngular

degAxialmm

RCS(short) A

131620253040

45.0067.00

107.50173.60246.10465.20

29.228.923.420.015.413.4

±0.08±0.10±0.12±0.16±0.20±0.25

±2.5±2.5±3.0±3.0±3.5±3.5

±0.30±0.40±0.50±0.70±0.85±1.25

1.13.08.8

24.058.0

220.0

4.748.42

14.6227.5045.9897.30

RCL(long) A

131620253040

53.5081.00

130.00216.10315.10606.20

64.365.162.082.285.089.0

±0.15±0.20±0.25±0.40±0.60±0.95

±2.5±2.5±3.0±3.0±3.5±3.5

±0.30±0.40±0.50±0.70±0.85±1.25

1.33.69.9

33.089.0

370.0

5.8310.3318.2038.4071.82

168.57Specifications vary according to bore size. For exact figures, please enquire. 1 Typical torsional stiffness.



Torque and speed capacityBasicPartNo


ReversingNm

Non ReversingNm

PeakNm

RCS(short) A

131620253040

0.500.751.302.052.905.50

0.701.151.953.104.408.30

1.201.903.255.207.35

13.80

30,00025,00020,00015,00011,0006,500

RCL(long) A

131620253040

0.500.751.302.052.905.50

0.701.151.953.104.408.30

1.201.903.255.207.35

13.80

20,00017,00015,00012,00010,0006,500




3 20 mm Bore

812

ReliaFlex® Precision Couplings Clamp Type


Couplings

and Collars




All dimensions in mmGeneral tolerances ±0.13mmMaterial: Aluminium alloy grade 7075T6Finish: Alocrom 1000



Maximum shaft intrusion when fitted = E+2 mm. Note: bores may be left unalocromed.


Example Part No: RCS A 20C 85 Dimensions(mm)

BasicPartNo



O/D

ØD ØH

Length

L

HubLength

E

FittedScrew

RCS(short) A

13C16C20C25C30C40C

33

444

5555

66666

88888

10101010

121212

1515 20

13.016.020.025.030.040.0

14.518.021.826.932.341.0

16.8019.7521.5025.8030.3035.95

5.005.906.607.609.10

10.60

M1.6M2M2.5M3M4M5

RCL(long) A

13C16C20C25C30C40C

33

444

5555

66666

88888

10101010

121212

1515 20

13.016.020.025.030.040.0

14.518.021.826.932.341.0

20.0023.5026.0034.0044.0057.00

5.005.906.607.609.10

10.60

M1.6M2M2.5M3M4M5

Product options• Alternative bore sizes• Imperial bores• Alternative materials• Electrically insulated, sizes 20 and 25• Set screw fixing• ReliaGrip™ clamp type see page 814• Custom designs see page 816• Product overview see pages 82 to 87• Selected items in stock, at reduced prices see page 817

3 20 mm Bore

813

ReliaFlex® Precision Couplings Clamp Type


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BasicPartNo


StiffnessNm/rad


Misalignment MaxInertiag.cm2

MaxMass

gParallel

mmAngular

degAxialmm

RCS(short) A

13C16C20C25C30C40C

45.0067.00

107.50177.60258.10481.20

29.228.923.420.015.413.4

±0.08±0.10±0.12±0.40±0.60±0.95

±2.5±2.5±3.0±3.0±3.5±3.5

±0.30±0.40±0.50±0.70±0.85±1.25

1.02.97.8

23.055.0

200.0

4.48.2

14.327.546.497.2

RCL(long) A

13C16C20C25C30C40C

53.5081.00

133.00223.10330.60627.30

64.365.162.082.285.089.0

±0.15±0.20±0.25±0.40±0.60±0.95

±2.5±2.5±3.0±3.0±3.5±3.5

±0.30±0.40±0.50±0.70±0.85±1.25

1.23.29.0

31.086.0

350.0

5.510.118.738.572.6

168.7Specifications vary according to bore size. For exact figures, please enquire.1 Typical torsional stiffness.

BasicPartNo


ReversingNm

Non ReversingNm

PeakNm

RCS(short)

orRCL(long)

A

13C16C20C25C30C40C

0.350.550.951.552.404.40

0.550.851.452.353.656.65

0.801.252.453.905.5011.10

12,00010,0007,5005,0003,8002,000







3 12 mm Bore

814

ReliaFlex® Precision Couplings ReliaGrip™ Clamp


Couplings

and Collars







Example Part No: RCS A 20G 85 Dimensions(mm)

BasicPartNo



O/D

ØD ØH

Length

L

HubLength

E

FittedScrew

RCS(short) A

13G16G20G25G

33

444

5555

6666

888

1010 12

13.016.020.025.0

14.518.021.826.9

16.8019.7521.5025.80

5.005.906.607.60

M1.6M2M2.5M3

RCL(long) A

13G16G20G25G

33

444

5555

6666

888

1010 12

13.016.020.025.0

14.518.021.826.9

20.0023.5026.0034.00

5.005.906.607.60

M1.6M2M2.5M3


Maximum shaft intrusion when fitted = E+2 mm.Note: bores may be left unalocromed.

Product options• Alternative bore sizes• Imperial bores• Alternative materials• Electrically insulated• Custom designs see page 816• Product overview see pages 82 to 87

3 12 mm Bore

815

ReliaFlex® Precision Couplings ReliaGrip™ Clamp


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BasicPartNo


StiffnessNm/rad



MaxMass

gParallel

mmAngular

degAxialmm

RCS(short) A

13G16G20G25G

45.0070.00115.00182.00

29.228.923.420.0

±0.08±0.10±0.12±0.16

±2.5±2.5±3.0±3.0

±0.30±0.40±0.50±0.70

1.02.97.9

23.0

4.48.6

14.927.5

RCL(long) A

13G16G20G25G

53.5084.00139.00227.00

64.365.162.082.2

±0.15±0.20±0.25±0.40

±2.5±2.5±3.0±3.0

±0.30±0.40±0.50±0.70

1.23.39.0

31.0

5.510.618.738.5

Specifications vary according to bore size. For exact figures, please enquire.1 Typical torsional stiffness.

BasicPartNo


ReversingNm

Non ReversingNm

PeakNm

RCS(short)

orRCL(long)

A

13G16G20G25G

0.450.751.302.05

0.601.151.953.10

0.701.653.255.20

12,00010,0007,5005,000







CustomDesigns

816

ReliaFlex® Precision Couplings


Couplings

and Collars

Provide allowablespace envelope

Provide performancerequirements

ReliaFlex® spaceevaluated

ReliaFlex®

performanceevaluated

Select from Catalogue

StandardCoupling

BespokeCoupling

Customer Enquiry

Bespoke designs

The ReliaFlex® coupling can be customised to suit individual applications. For example, specialinterfaces can be incorporated into the design to allow easier interaction between the coupling and othercomponents within the assembly. Alternative materials such as PEEK polymer and other plastics areavailable.

Reliance’s design engineers can predict the achievableperformance of ReliaFlex® confidently when provided with detailsof the allowable space envelope.

Please contact us to discuss your requirements.

StockedCouplings

817

ReliaFlex® Precision Couplings


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The range of couplings below is held in stock and available on short delivery at reduced prices.It is subject to change from time to time, please visit our website at www.reliance.co.uk/shop for thelatest details.

Stocked range of ReliaFlex® couplings

Long type Short typeSize 6RCLA61.51.5RCLA631.5

Size 8RCLA822RCLA833

Size 10RCLA100.2500.250RCLA1055

Size 13RCLA130.2500.250RCLA1344RCLA1365RCLA13C42RCLA13C44RCLA13C66

Size 16RCLA16C44 RCLA16C54RCLA16C66

Size 20RCLA20C66RCLA20C88RCLA20C1010RCLA20C0.2500.250RCLA20C0.2505RCLA20C0.2506

Size 25RCLA25C66RCLA25C88RCLA25C1010RCLA25C0.2500.250RCLA25C0.3750.375RCLA25C0.5000.500

Size 6RCSA61.51.5RCSA631.5

Size 8RCSA822RCSA833

Size 10RCSA1053RCSA1055

Size 13RCSA1344RCSA1353RCSA130.2500.250RCSA13C33RCSA13C55

Size 16RCSA16C66RCSA16C0.2505

Size 20RCSA20C65RCSA20C66RCSA20C88RCSA20C1010

Size 25RCSA25C65RCSA25C66RCSA25C86RCSA25C88

3 16 mm Bore

818

Bellows CouplingsSet Screw Hub


Couplings

and Collars




All dimensions in mmGeneral tolerances ±0.13 mm

Part number selection tablePart

NumberHub

MaterialBellowsMaterial

Bore

ØB1

Bore

ØB2

O/D

ØD

Length

L

ScrewPosition

T

ScrewThread

SRBKBS12220303RBKBS12220404RBKBS12220604RBKBS12220505RBKBS12220606

Brass(NickelPlated)

Bronze(NickelPlated)

34656

34456

12 22 2.2 M2.5

RBKXS15200303RBKXS15200404RBKXS15200504RBKXS15200505RBKXS15200606

Aluminium(Anodised)

Stainlesssteel

34556

34456

15 20 2.0 M3


Aluminium(Anodised)

Stainlesssteel

34556

34456

15 22 2.0 M3


Aluminium(Anodised)

Stainlesssteel

34556

34456

15 25 2.0 M3


Aluminium(Anodised)

Stainlesssteel

4568

10

4568

10

19 24 2.0 M3

H8Bore Size Tolerance

3 +0.014456

+0.018

810 +0.022

121416

+0.027

3 16 mm Bore

819

Bellows CouplingsSet Screw Hub


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SizeRef

MaxSpeed

min1

MaxTorque

Ncm

Misalignment TorsionalStiffness

Nm/rad

RadialStiffness

N/mm

Momentof Inertia

gcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg1222

10,000

15 ±0.20 ±0.40 ±2.5 45 30 1.8 50 8.01520 40 ±0.20 ±0.40 ±3.0 90 40 2.0 70 6.01522 40 ±0.25 ±0.45 ±4.0 85 20 2.1 70 6.51525 40 ±0.30 ±0.50 ±4.0 70 15 2.3 70 7.01924 80 ±0.25 ±0.40 ±4.0 150 25 7.0 70 10.02029 80 ±0.25 ±0.40 ±4.0 150 25 8.0 150 15.02035 80 ±0.30 ±0.50 ±4.0 140 10 9.0 150 16.02526 200 ±0.30 ±0.40 ±4.0 220 45 19.0 100 17.5

Technical specifications

Part number selection table continuedPart

NumberHub


Bore

ØB1

Bore

ØB2

O/D

ØD

Length

L

ScrewPosition

T

ScrewThread

SRBKXS20290404RBKXS20290604RBKXS20290606RBKXS20291006RBKXS20290808RBKXS20291010RBKXS20291210RBKXS20291212

Aluminium(Anodised)

Stainlesssteel

466

108

101212

44668

101012

20 29 3.2 M4

RBKXS20350404RBKXS20350604RBKXS20350606RBKXS20351006RBKXS20350808RBKXS20351010RBKXS20351210

Aluminium(Anodised)

Stainlesssteel

466

108

1012

44668

1010

20 35 3.2 M4

RBKXS25260606RBKXS25260808RBKXS25261010RBKXS25261212RBKXS25261414RBKXS25261616

Aluminium(Anodised)

Stainlesssteel

68

10121416

68

10121416

25 26 2.8 M4

Technical support• Zero backlash• High torsional stiffness and low bearing loads• Complete absorption of eccentricity, angularity and end play

by spring action of the bellows• Maintenance free• Recommended temperature range 30ºC to +120ºC• Product overview see pages 82 to 87• Technical information see page T81

3 16 mm Bore

820

Bellows CouplingsClamp Hub


Couplings

and Collars






NumberHub


Bore

ØB1

Bore

ØB2

O/D

ØD

Length

L

ScrewPosition

T

ScrewThread

SRBKXK16220303RBKXK16220404RBKXK16220504RBKXK16220604RBKXK16220505RBKXK16220606

Aluminium(Anodised)

Stainlesssteel

345656

344456

16 22 2.3 M2

RBKXK16240303RBKXK16240603RBKXK16240404RBKXK16240504RBKXK16240604RBKXK16240505RBKXK16240606

Aluminium(Anodised)

Stainlesssteel

3645656

3344456

16 24 2.3 M2

RBKXK16270303RBKXK16270603RBKXK16270404RBKXK16270504RBKXK16270505RBKXK16270606

Aluminium(Anodised)

Stainlesssteel

364556

334456

16 27 2.3 M2

RBKXK21290606RBKXK21291006RBKXK21290808RBKXK21291010

Aluminium(Anodised)

Stainlesssteel

610

810

668

10

21 29 3.0 M2.5


3 +0.014456

+0.018

810 +0.022

121416

+0.027

3 16 mm Bore

821

Bellows CouplingsClamp Hub


Cou

plin

gsan

d C

olla

rs

SizeRef

MaxSpeed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof Inertia

gcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg1622

10,000

40 ±0.20 ±0.40 ±3.0 90 40 2.1 50 6.01624 40 ±0.25 ±0.45 ±4.0 85 20 2.2 50 6.51627 40 ±0.30 ±0.50 ±4.0 70 15 2.6 50 7.02129 80 ±0.25 ±0.40 ±4.0 150 25 9.0 100 15.02135 80 ±0.30 ±0.50 ±4.0 140 10 9.5 100 16.02429 80 ±0.25 ±0.40 ±4.0 150 25 15.0 100 17.02435 80 ±0.30 ±0.50 ±4.0 140 10 15.2 100 18.03030 200 ±0.30 ±0.40 ±4.0 220 45 37.0 100 31.0



NumberHub


Bore

ØB1

Bore

ØB2

O/D

ØD

Length

L

ScrewPosition

T

ScrewThread

SRBKXK21350606RBKXK21351006RBKXK21350808RBKXK21351010

Aluminium(Anodised)

Stainlesssteel

610

810

668

10

21 35 3.0 M2.5

RBKXK24291206RBKXK24291210RBKXK24291212

Aluminium(Anodised)

Stainlesssteel

121212

61012

24 29 3.0 M2.5

RBKXK24351206RBKXK24351210RBKXK24351212

Aluminium(Anodised)

Stainlesssteel

121212

61012

24 35 3.0 M2.5

RBKXK30301210RBKXK30301212RBKXK30301414RBKXK30301616

Aluminium(Anodised)

Stainlesssteel

12121416

10121416

30 30 3.0 M3


by spring action of the bellows• Maintenance free• Recommended temperature range 30ºC to +120ºC• Technical information see page T81• Product overview see pages 82 to 87

2 12 mm Bore

822

Nickel Bellows Couplings Set Screw Hub


Couplings

and Collars

SizeRef

MaxSpeed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg1223

10,00013 ±0.54 ±2.29 ±15 28 4.2 1.85 60 10.0

1730 39 ±0.72 ±3.09 ±14 70 3.0 3.81 80 10.02533 200 ±0.46 ±2.77 ±8 210 29.0 16.10 80 19.5







NumberHub


Bore

ØB1

Bore

ØB2

O/D

ØD

Length

L

ScrewPosition

T

ScrewThread

SRBKNS12230202RBKNS12230302RBKNS12230303RBKNS12230404RBKNS12230604RBKNS12230606

Stainlesssteel Nickel

233466

223446

12 23 2.0 M2.5

RBKNS17300404RBKNS17300604RBKNS17300606RBKNS17301006RBKNS17300808RBKNS17301010

Aluminium(Anodised) Nickel

466

108

10

44668

10

17 31 2.0 M3

RBKNS25330606RBKNS25331006RBKNS25331206RBKNS25330808RBKNS25331010RBKNS25331212


61012

81012

6668

1012

25 33 2.3 M3


23 +0.014

46 +0.018

810 +0.022

12 +0.027

3 12 mm Bore

823

Nickel Bellows Couplings Clamp Hub


Cou

plin

gsan

d C

olla

rs

SizeRef

MaxSpeed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg1733 10,000 39 ±0.72 ±3.09 ±14 70 3.0 4.89 35 11.52537 200 ±0.46 ±2.77 ±8 210 29.0 25.40 66 28.5




Associated ProductsShafts: page 112Bearings: page 121Leadscrews: page 71Intelligent motors: page 22

PartNumber

HubMaterial

BellowsMaterial

Bore

ØB1

Bore

ØB2

O/D

ØD

Length

L

ScrewPosition

T

ScrewThread

SRBKNK17330303RBKNK17330404RBKNK17330604RBKNK17330606


3466

3446

16.3 33 2.5 M2

RBKNK25370606RBKNK25371006RBKNK25370808RBKNK25371010RBKNK25371212


610

81012

668

1012

25 37 2.8 M2.5


3 +0.01446 +0.018

810 +0.022

12 +0.027


by spring action of the bellows• Maintenance free• Recommended temperature range 30ºC to +120ºC• Technical information see page T81• Product overview see pages 82 to 87

2 6 mm Bore

824

Flexible Disc Spring Couplings Set Screw Hub


Couplings

and Collars





SizeRef

MaxSpeed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg2014 10,000 50 ±0.3 ±2.5 100 2.6 60 5.0



NumberHub

MaterialDisc

SpringsMaterial

Bore

ØB1

Bore

ØB2RFSXS20140202RFSXS20140402RFSXS20140404RFSXS20140606

Aluminium(Anodised)

Stainlesssteel

2446

2246


2 +0.01446 +0.018

Technical support• Zero backlash• High torsional stiffness• Maintenance free• Recommended temperature range 30ºC to +120ºC• Vibration isolation• Technical information see page T81• Product overview see pages 82 to 87

2 6 mm Bore

825

Flexible Disc Spring Couplings Set Screw Hub


Cou

plin

gsan

d C

olla

rs





NumberHub

MaterialDisc

SpringsMaterial

Bore

ØB1

Bore

ØB2RFSXS20160202RFSXS20160402RFSXS20160404RFSXS20160606

Aluminium(Anodised)

Stainlesssteel

2446

2246

SizeRef

MaxSpeed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg2016 10,000 50 ±0.2 ±0.4 ±3.0 20 125 2.8 60 6.0


2 +0.01446 +0.018

Technical support• Zero backlash• High torsional stiffness and low bearing loads• Maintenance free• Recommended temperature range 30ºC to +120ºC• Vibration isolation• Technical information see page T81• Product overview see pages 82 to 87

2 4 mm Bore

826

Flexible Disc Spring Couplings Clamp Hub


Couplings

and Collars

SizeRef

MaxSpeed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg2213 10,000 20 ±0.3 ±0.3 ±2.0 14 3.0 3.2 20 9.5



NumberHub

MaterialDisc

SpringsMaterial

Bore

ØB1

Bore

ØB2RFSXK22130202RFSXK22130302RFSXK22130303RFSXK22130404

Nickel platedsteel

Stainlesssteel

2334

2234






23 +0.014

4 +0.018


3 8 mm Bore

827

Flexible Disc Spring Couplings Clamp Hub


Cou

plin

gsan

d C

olla

rs



NumberHub

MaterialDisc

SpringsMaterial

Bore

ØB1

Bore

ØB2RFSXK30190303RFSXK30190404RFSXK30190505RFSXK30190605RFSXK30190606RFSXK30190806RFSXK30191008

Aluminium(Anodised)

Stainlesssteel

345668

10

3455668

SizeRef

MaxSpeed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg3019 12,000 80 ±0.4 ±0.4 ±3.0 150 6 19 80 16




3 +0.014456

+0.018

8 +0.022


6 14 mm Bore

828

Flexible Disc Spring CouplingsClamp Hub


Couplings

and Collars



NumberHub

MaterialDisc

SpringsMaterial

Bore

ØB1

Bore


Aluminium(Anodised) Stainless steel

69.531012121414

69.531010121214

SizeRef

MaxSpeed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg3832 8,000 200 ±0.3 ±0.3 ±2.5 250 220 82 100 53






6 +0.0189.5310 +0.022

1214 +0.027

Technical support• Zero backlash• High torsional stiffness and low bearing loads• Maintenance free• Recommended temperature range 30ºC to +120ºC• Vibration isolation• Suitable for high number of revolutions at high torque• Technical information see page T81• Product overview see pages 82 to 87

6 14 mm Bore

829

Flexible Disc Spring CouplingsClamp Hub


Cou

plin

gsan

d C

olla

rs



NumberHub

MaterialDisc

SpringsMaterial

Bore

ØB1

Bore


Aluminium(Anodised) Stainless steel

69.531012121414

69.531010121214

SizeRef

MaxSpeed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg3850 8,000 200 ±0.8 ±0.8 ±2.5 250 12 106 100 63




6 +0.0189.5310 +0.022

1214 +0.027

Technical support• Zero backlash• High torsional stiffness and low bearing loads• Maintenance free• Recommended temperature range 30ºC to +120ºC• Vibration isolation• Suitable for high number of revolutions at high torque• Technical information see page T81• Product overview see pages 82 to 87

3 12 mm bore

830

Oldham Couplings


Couplings

and Collars

M0ST (set screw) M0CT (clamp)




All dimensions in mmHub material: Aluminium alloygrade 2024 T351 or 7075 T651Finish: Black sulphuric anodised MILA8625 Type II, class 2Spacer material: Acetal or nylon 11

Example Part No: M0ST AT 13 33 Dimensions(mm)

BasicPartNo

DiscMaterial

Size Standard Bore Sizes ØB1 and ØB2


O/D

ØD

Length

L

HubLength

E

FittedScrew

T

M0ST(set

screw)

AT(Acetal)

NL(Nylon)

131925 3341

3 44

55

666

888

101010

121212

12.719.125.433.341.3

15.922.228.647.650.8

5.67.69.9

15.018.0

M3M3M4M4M5

M0CT(clamp)

AT(Acetal)

NL(Nylon)

1925 3341

4 5 66

888

101010

121212

19.125.433.341.3

25.431.847.650.8

9.711.915.018.0

M2.5M3M3M4


Product options• Larger or alternative bore sizes• Imperial bores• Product overview see pages 82 to 87

Note: Oldham couplings sizes 13 and 19 use only two set screws ‘T’

3 12 mm Bore

831

Oldham Couplings


Cou

plin

gsan

d C

olla

rs

SizeRef

DiscMaterial

TorsionalStiffnessDeg/Nm

Torque Capacity MisalignmentRated

NmBreak

NmParallel

mmAxialmm

13 AT 0.636 0.68 3.9 0.10 0.05NL 2.560 0.17 2.8 0.10 0.05

19 AT 0.380 2.25 10.5 0.20 0.10NL 1.240 0.57 9.6 0.20 0.10

25 AT 0.291 4.75 19.0 0.20 0.10NL 1.110 1.13 15.9 0.20 0.10

33 AT 0.079 8.00 39.5 0.20 0.15NL 0.460 2.05 34.0 0.20 0.15

41 AT 0.068 14.75 54.5 0.25 0.15NL 0.330 3.65 45.3 0.25 0.15


Technical support• Zero backlash with acetal disc • High parallel misalignment capability• Electrically insulated discs act as a mechanical fuse

preventing damage to other components• Temperature range:

Acetal disc: 23ºC to +65ºC.Nylon disc: 23ºC to +54ºC.

• Max speed: 4,500 rpm• Acetal discs provide high torsional stiffness• Nylon discs provide vibration and shock absorption• Technical information see page T81• Installation information see page T83

6 10 mm Bore

832

Membrane Couplings Clamp Hub


Couplings

and Collars



NumberHub

MaterialMembrane

MaterialBoreØB1

BoreØB2

RFSKK25190606RFSKK25191006RFSKK25190808RFSKK25191010

Aluminium(Anodised)

Polyamide6.6

reinforcedfibreglass

610

810

668

10

SizeRef

MaxSpeed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg2519 12,000 40 ±0.25 ±0.4 ±2.5 22 60 13.5 65 16






6 +0.018810 +0.022

Technical support• Zero backlash• Maintenance free• Recommended temperature range 10ºC to +80ºC• Electrical isolation• Technical information see page T81• Product overview see pages 82 to 87

6 12 mm Bore

833

Membrane CouplingsClamp Hub


Cou

plin

gsan

d C

olla

rs



NumberHub

MaterialMembrane

MaterialBoreØB1

BoreØB2

RFSKK25250606RFSKK25251006RFSKK25250808RFSKK25251010RFSKK25251210RFSKK25251212

Aluminium(Anodised)

Polyamide6.6


610

8101212

668

101012

SizeRef

MaxSpeed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg2525 12,000 40 ±0.25 ±0.4 ±2.5 22 60 15 65 18




6 +0.0188

10 +0.022

12 +0.027

Technical support• Zero backlash• Maintenance free• Recommended temperature range 10ºC to +80ºC• Electrical isolation• Technical information see page T81• Product overview see pages 82 to 87

6 14 mm Bore

834



Couplings

and Collars



NumberHub

MaterialMembrane

MaterialBoreØB1

BoreØB2

RFSKK30220606RFSKK30221006RFSKK30220808RFSKK30221010RFSKK30221210RFSKK30221212RFSKK30221414

Aluminium(Anodised)

Polyamide6.6


610

810121214

668

10101214

SizeRef

MaxSpeed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg3022 12,000 60 ±0.3 ±0.4 ±2.5 30 40 35 80 30






6 +0.018810 +0.022

1214 +0.027

Technical support• Zero backlash• High torsional stiffness and low bearing loads• Maintenance free• Recommended temperature range 10ºC to +80ºC• Electrical isolation• High rigidity• Technical information see page T81• Product overview see pages 82 to 87

6 14 mm Bore

835



Cou

plin

gsan

d C

olla

rs



NumberHub

MaterialMembrane

MaterialBoreØB1

BoreØB2

RFSKK30270606RFSKK30271006RFSKK30270808RFSKK30271010RFSKK30271210RFSKK30271212RFSKK30271414

Aluminium(Anodised)

Polyamide6.6


610

810121214

668

10101214

SizeRef

MaxSpeed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg3027 12,000 60 ±0.3 ±0.4 ±2.5 30 40 37 80 32




6 +0.0188

10 +0.022

1214 +0.027

Technical support• Zero backlash• High torsional stiffness and low bearing loads• Maintenance free• Recommended temperature range 10ºC to +80ºC• Electrical isolation• High rigidity• Technical information see page T81• Product overview see pages 82 to 87

6 12 mm Bore

836

Curved Jaw Couplings Set Screw Hub


Couplings

and Collars

Technical specificationsElement

HardnessMax

Speed

min1

MaxTorque

Ncm

Misalignment at 750rpm Twistat MaxTorque

Deg

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg80

19,000800 ±0.22 ±1.0 ±1.3 10 30 120 34

92 1500 ±0.22 ±1.0 ±1.3 10 30 120 3498 2500 ±0.22 ±1.0 ±1.3 10 30 120 34






Example Part No: RKKAS 1500 08 06 92

BasicPart Number

HubMaterial

Damping ElementMaterial

ElementHardness

BoreØB1

BoreØB2

RKKAS15000606RKKAS15000806RKKAS15000808RKKAS15001008RKKAS15001010RKKAS15001210

Aluminium(Anodised) Polyurethane

80 (blue)92 (white)98 (red)

688

101012

6688

1010


6 +0.018810 +0.022

12 +0.027

Technical support• Zero backlash• Alternative damping element hardness• Maintenance free• Recommended temperature range 30ºC to +80ºC• Torque ripple reduction• Technical information see page T81• Product overview see pages 82 to 87

6 12 mm Bore

837

Curved Jaw Couplings Clamp Hub


Cou

plin

gsan

d C

olla

rs

Technical specificationsElement

HardnessMax

Speed

min1

MaxTorque

Ncm

Misalignment at 750rpm Twistat MaxTorque

Deg

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg80

19,000800 ±0.22 ±1.0 ±1.3 10 30 150 34

92 1500 ±0.22 ±1.0 ±1.3 10 30 150 3498 2500 ±0.22 ±1.0 ±1.3 10 30 150 34




Example Part No: RKKAK 1500 08 06 92

BasicPart Number

HubMaterial

Damping ElementMaterial

ElementHardness

BoreØB1

BoreØB2

RKKAK15000606RKKAK15000806RKKAK15000808RKKAK15001008RKKAK15001010RKKAK15001210

Aluminium(Anodised) Polyurethane

80 (blue)92 (white)98 (red)

688

101012

6688

1010


6 +0.0188

10 +0.022

12 +0.027

Technical supprt• Zero backlash• Alternative damping element hardness• Maintenance free• Recommended temperature range 30ºC to +80ºC• Torque ripple reduction• Technical information see page T81• Product overview see pages 82 to 87

1 5 mm Bore

838

Micro Spiral Beam CouplingsSet Screw Hub


Couplings

and Collars



SizeMax

Speed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg6508 8,000 2 ±0.10 ±0.15 ±2.0 0.55 24 0.02 8 0.51015 15 ±0.15 ±0.20 ±2.0 2.20 22 0.34 15 2.4





PartNumber

Material Bore

ØB1

Bore

ØB2

O/D

ØD

Length

L

ScrewPosition

T

ScrewThread

SRWKAS65080101RWKAS65080201RWKAS65080202

Aluminium122

112

6.5 8 1.3 M1.6

RWKAS10150202RWKAS10150302RWKAS10150402RWKAS10150502RWKAS10150303RWKAS10150503

Aluminium

234535

222233

10 15 2.0 M2


123

+0.014

45 +0.018

Technical support• Zero backlash• High torsional stiffness and low bearing loads• Maintenance free• Recommended temperature range 30ºC to +150ºC• One piece construction• Technical information see page T81• Product overview see pages 82 to 87

2 6 mm Bore

839

Spiral Beam CouplingsSet Screw Hub


Cou

plin

gsan

d C

olla

rs



SizeMax

Speed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg1218 8,000 25 ±0.15 ±0.25 ±2.5 2.8 28 0.83 35 4.01622 40 ±0.20 ±0.30 ±3.0 5.0 34 3.20 50 9.5



PartNumber

Material Bore

ØB1

Bore

ØB2

O/D

ØD

Length

L

ScrewPosition

T

ScrewThread

SRWKAS12180402RWKAS12180303RWKAS12180403RWKAS12180404

Aluminium

4344

2334

12 18 2.5 M2.5

RWKAS16220303RWKAS16220503RWKAS16220404RWKAS16220504RWKAS16220505RWKAS16220606

Aluminium

354556

334456

16 22 3.0 M3


23 +0.014

456

+0.018


4 14 mm Bore

840



Couplings

and Collars






NumberMaterial Bore

ØB1

Bore

ØB2

O/D

ØD

Length

L

ScrewPosition

T

ScrewThread

SRWKAS19220404RWKAS19220604RWKAS19220505RWKAS19220606RWKAS19220806RWKAS19220808

Aluminium

465688

445668

19 22 3.0 M3

RWKAS20190604RWKAS20190505RWKAS20190606RWKAS20190806

Aluminium

6568

4566

20 19 2.8 M3

RWKAS25240606RWKAS25240806RWKAS25241006RWKAS25240808RWKAS25241008RWKAS25241010RWKAS25241212

Aluminium(Anodised)

68

108

101012

66688

1012

25 24 3 M4

RWKAS25320606RWKAS25320806RWKAS25321006RWKAS25320808RWKAS25321008RWKAS25321010RWKAS25321210RWKAS25321212

Aluminium(Anodised)

68

108

10101212

66688

101012

25 32 4 M4


456

+0.018

810 +0.022

1214 +0.027

4 14 mm Bore

841



Cou

plin

gsan

d C

olla

rs

SizeRef

MaxSpeed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg1922

8,000

60 ±0.25 ±0.4 ±3.5 9 40 6.7 50 132019 60 ±0.25 ±0.4 ±3.5 9 40 6.0 50 122524 100 ±0.30 ±0.5 ±4.0 20 60 22.2 120 262532 100 ±0.30 ±0.5 ±4.0 18 50 30.0 120 353030 150 ±0.30 ±0.5 ±4.0 21 60 57.0 120 453038 150 ±0.30 ±0.5 ±4.0 21 60 76.0 120 60



NumberMaterial Bore

ØB1

Bore

ØB2

O/D

ØD

Length

L

ScrewPosition

T

ScrewThread

SRWKAS30301010RWKAS30301210RWKAS30301410

Aluminium(Anodised)

101214

101010

30 30 4 M4

RWKAS30381010RWKAS30381210RWKAS30381410RWKAS30381212

Aluminium(Anodised)

10121412

10101012

30 38 5 M4


2 14 mm Bore

842

Spiral Beam CouplingsClamp Hub


Couplings

and Collars






NumberMaterial Bore

ØB1

Bore

ØB2

O/D

ØD

Length

L

ScrewPosition

T

ScrewThread

SRWKAK14210202RWKAK14210302RWKAK14210303RWKAK14210403RWKAK14210404

Aluminium(Anodised)

23344

22334

14 21 2.6 M2

RWKAK16250303RWKAK16250503RWKAK16250404RWKAK16250604RWKAK16250505RWKAK16250605

Aluminium(Anodised)

354656

334455

16 25 3.0 M2

RWKAK19280404RWKAK19280604RWKAK19280505RWKAK19280605RWKAK19280606

Aluminium(Anodised)

46566

44556

19 28 3.3 M3

RWKAK25320606RWKAK25320806RWKAK25321006RWKAK25320808RWKAK25321008RWKAK25321010RWKAK25321210

Aluminium(Anodised)

68

108

101012

66688

1010

25 32 4.0 M3


23 +0.014

456

+0.018

810 +0.022

1214 +0.027

2 14 mm Bore

843



Cou

plin

gsan

d C

olla

rs

SizeRef

MaxSpeed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg1421

6,000

50 ±0.20 ±0.25 ±3.0 4.5 22 1.9 50 6.51625 60 ±0.20 ±0.30 ±3.5 5.5 30 3.8 50 101928 80 ±0.25 ±0.40 ±4.0 8 36 8.7 80 162532 100 ±0.35 ±0.50 ±4.0 16 45 29.0 100 343038 150 ±0.35 ±0.50 ±4.0 19 60 76.0 100 58



NumberMaterial Bore

ØB1

Bore

ØB2

O/D

ØD

Length

L

ScrewPosition

T

ScrewThread

SRWKAK30381010RWKAK30381210RWKAK30381212RWKAK30381414

Aluminium(Anodised)

10121214

10101214

30 38 4.8 M4


8 10 mm BoreStainless Steel

844



Couplings

and Collars



SizeRef

MaxSpeed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg2524 8,000 200 ±0.3 ±0.5 ±4.0 40 250 64 200 65

PartNumber

Material BoreØB1

BoreØB2

RWKXS25240808RWKXS25241010

Stainlesssteel

810

810






810 +0.022

Technical support• Zero backlash• High torsional stiffness• Maintenance free• Recommended temperature range 30ºC to +180ºC• One piece construction• Technical information see page T81• Product overview see pages 82 to 87

6 10 mm BoreStainless Steel

845



Cou

plin

gsan

d C

olla

rs



SizeRef

MaxSpeed

min1

MaxTorque

Ncm


Nm/rad

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg2532 6,000 200 ±0.35 ±0.5 ±4.0 29 150 84 200 88

PartNumber

Material BoreØB1

BoreØB2

RWKXK25321006RWKXK25320808RWKXK25321010

Stainlesssteel

108

10

68

10




6 +0.0188

10 +0.022

Technical support• Zero backlash• High torsional stiffness• Maintenance free• Recommended temperature range 30ºC to +180ºC• One piece construction• Technical information see page T81• Product overview see pages 82 to 87

6 10 mm Bore

846

Radial Tooth Couplings


Couplings

and Collars



NumberCouplingMaterial

BoreØB1

BoreØB2

RSKSS20220606RSKSS20220806RSKSS20221006RSKSS20220808RSKSS20221010

Steel9S Mn Pb 28

(Black finished)

68

108

10

6668

10

SizeRef

MaxSpeed

min1

MaxTorque

Ncm

Misalignment Module

mm

RadialStiffness

N/mm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

ApproxWeight

g

Radial

mm

Axial

mm

Angular

deg2022 8,000 200 N/A N/A ±0.5 0.7 N/A 26 80 42






6 +0.018810 +0.022

Technical support• Recommended temperature range 30ºC to +120ºC• Self centering connection• Technical information see page T81• Product overview see pages 82 to 87

4 6 mm Bore

847

Friction Clutch Spiral SpringClamp Hub


Cou

plin

gsan

d C

olla

rs




PartNumber

Bore

ØB

MaxSpeed

min1

MaxAdjustable

TorqueNcm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm

Material ApproxWeight

g

Flange ClutchLining

RRKSK202004RRKSK202005RRKSK202006

456

50 30 8.4 100Steel

9S Mn Pb 28(Black finished)

Nylatron 20

Note: Gear not included, manufactured on request, please enquire


456

+0.018

f8Shaft Dia Tolerance

10 0.0130.035

Technical support• Zero backlash before slipping• Maintenance free• Recommended temperature range 10ºC to +50ºC• Protects actuators from torque damage• Adjustable torque setting• Technical information see page T81• Product overview see pages 82 to 87

4 6 mm Bore

848

Friction Clutch Spiral SpringSet Screw Hub


Couplings

and Collars

Part number selection and technical tablePart

NumberBore

ØB

MaxSpeed

min1

MaxAdjustable

TorqueNcm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm


g

Flange ClutchLining

RRKSS202504RRKSS202505RRKSS202506

456

50 30 8.4 80Steel


Nylatron 23







456

+0.018


10 0.0130.035


4 6 mm Bore

849

Friction Clutch Plate Spring Clamp Hub


Cou

plin

gsan

d C

olla

rs

Technical specificationsPart

NumberBore

ØB

MaxSpeed

min1

MaxAdjustable

TorqueNcm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm


g

Flange ClutchLining

RRKTK202004RRKTK202005RRKTK202006

456

40 120 7 100Steel


Nylatron 23




456

+0.018


10 0.0130.035



4 6 mm Bore

850

Friction Clutch Plate Spring Set Screw Hub


Couplings

and Collars






PartNumber

Bore

ØB

MaxSpeed

min1

MaxAdjustable

TorqueNcm

Momentof

Inertiagcm2

MaxScrewTorque

Ncm


g

Flange ClutchLining

RRKTS202504RRKTS202505RRKTS202506

456

40 120 9.9 80Steel


Nylatron 25


456

+0.018


10 0.0130.035



3 10 mm Bore

851

Solid Couplings


Cou

plin

gsan

d C

olla

rs

All dimensions in mmMaterials: Aluminium alloy

grade 2024 T351Stainless steel

Grade18.8 type 303Screws C12L14


Example Part No:MCLX A 33

Dimensions(mm)

BasicPart

Number

Material SizeRef

Standard Bore Sizes ØB1 and ØB2

(bore tolerance +0.012/+0.050)

O/D

ØD

Length

L ØC

ClampScrew

T

MCLX(1piece)

MSPX(2piece)

A*(Aluminium)

SS(St. steel)

34568

10

34568

10

151515182429

222222303545

15.015.015.021.527.133.0

M2M2M2M3M3M4

*Aluminium is only available on MCLX

MCLX (one piece) MSPX (two piece)


Product options Technical support• Alternative bore sizes• Imperial bores• Set screw clamping• Stainless steel screws

• Does not mark the shaft• Nypatch® antivibration hardware• Precision honed bore• MSPX, two piece style is balanced by opposing

hardware and is easily disassembled andmaintained

• Max speed: 4,000 rpm• Recommended temperature range:

Stainless steel 40ºC to +175ºCAluminium 40ºC to +100ºC

• Technical information see page T81• Installation information see page T84• Product overview see pages 82 to 87

852 Contact us for product information, design support and custom [email protected] +44 (0) 1484 601002 www.reliance.co.uk

Couplings

and Collars




All dimensions in mmMaterials: Aluminium alloy grade 2024 T351Stainless steel Grade18.8 type 303Screws C12L14

Example Part No:MWCL A 6

Dimensions(mm)

BasicPart

Number

Material Size Standard Bore Sizes ØB


O/D

ØD

Width

W ØC

ClampScrew

TMWCL

(1piece)MWSP

(2piece)

A*(Aluminium)

SS(St. steel)

68

10

68

10

161824

202020

20.822.426.3

M3M3M3

MWCL (one piece) MWSP (two piece)

*Aluminium is only available on MWCL


Product options Technical support• Alternative bore sizes• Imperial bores• Set screw clamping• Stainless steel screws

• Does not mark the shaft• Integral location face• Excellent for high axial loads• MWSP, two piece style is balanced by

opposing hardware and is easily disassembledand maintained

• Transmits torque in confined spaces• Recommended temperature range:


• Installation information see page T84• Product overview see pages 82 to 87

6 10 mm Bore Double Width Shaft Clamp Collars

3 10 mm Bore

853

Shaft Clamp Collars


Cou

plin

gsan

d C

olla

rs


All dimensions in mmMaterials: Aluminium alloy

grade 2024 T351sulphuric anodised

Stainless steel Grade18.8 type 303

Screws C12L14

MCL (one piece) MSP (two piece)

Example Part No:MCL A 3

Dimensions(mm)

BasicPart

Number



O/D

ØD

Width

W ØC

ClampScrew

T

MCL(1piece)

MSP(2piece)

A (Aluminium)

SS(St. steel)

3456789

10

3456789

10

1616161618182424

99999999

20.820.820.820.822.422.426.326.3

M3M3M3M3M3M3M3M3


Product options Technical support• Alternative bore sizes• Imperial bores• Stainless steel screws• Plastic collars available• 316 stainless steel available

• Does not mark shaft• Integral location face• MSP, two piece style is balanced by opposing

hardware and is easily disassembled andmaintained

• Predrilled face holes• Recommended temperature range:


• Installation information see page T84• Product overview see pages 82 to 87

854 Contact us for product information, design support and custom [email protected] +44 (0) 1484 601002 www.reliance.co.uk

Couplings

and Collars




All dimensions in mmMaterial: Stainless steel grade 18.8 type 303Screws C12L14

Example Part No:MTCL SS 4

Dimensions(mm)

BasicPart

Number

Material Size Standard Thread Sizes

B

O/D

ØD

Width

W ØC

ClampScrew

T

MTCL SS(St. steel)

4568

10

M4x0.7M5x0.8M6x1

M8x1.25M10x1.5

1616161824

99999

20.820.820.822.426.3

M3M3M3M3M3

MTCL (threaded)


Product options Technical support• Alternative thread sizes• Imperial threads• Stainless steel screws• Acme and lefthand threads available• Additional sizes available

• Does not mark shaft• Integral location face• Installation information see page T84• Product overview see pages 82 to 87

4 10 mm Bore One Piece Threaded Collars

4 10 mm Bore

855

One Piece Set Screw Collars


Cou

plin

gsan

d C

olla

rs

Example Part No:MSC SS 4

Dimensions(mm)

BasicPart

Number



O/D

ØD

Width

W

SetScrew

T

MSC SS(St. steel)

4568

10

4568

10

810121620

5688

10

M2.5X3M3X4M4X4M4X4M5X5

MSC (set screw)



All dimensions in mmMaterial: Stainless steel

grade 18.8 type 303Screws C12L14

Product options Technical support• Alternative bore sizes• Imperial bores• Stainless steel screws• Plastic collars available

• Forged socket set screw• Installation information see page T84• Product overview see pages 82 to 87

TechnicalInformation

T81

Couplings


Tech

nica

lIn

form

atio

n

TORSIONAL STIFFNESS

This is the characteristic that describes theangular deflection when a torque is applied. Hightorsional stiffness contributes to increasedaccuracy and system response. It is essential foraccurate feedback applications.Applications that are subject to shock loads mayrequire a less stiff coupling to reduce the peaktorques and avoid premature failure or slippingclamps.

RADIAL COMPLIANCE

This is the characteristic that describes the forcethe coupling applies on the support bearings whenthe shafts are misaligned. High radial complianceis essential to provide low bearing loads.

TORQUE CAPACITY

In general, the rated torque figures are based on>106 torque reversals and the peak torque shouldnot be applied for more than 1% of the duty cycle.

Test samples are standard productswith a nominal O.D of 20 mm

Torque (mNm)

Tors

iona

l Erro

r (m

inut

es o

f arc

)Fo

rce

(N)

Parallel Offset (mm)

Test samples are standard productswith a nominal O.D of 20 mm

Angular CombinedAxialParallel

SHAFT MISALIGNMENT

The most common type of misalignment is a combination of angular, parallel and axial misalignmentand occurs due to the buildup of tolerances as associated parts are assembled together. As theseaccumulate randomly, worstcase misalignment should be calculated and used to select the correctcoupling to avoid premature failure.

TechnicalInformation Couplings

T82 Contact us for product information, design support and custom [email protected] +44 (0) 1484 601002 www.reliance.co.uk

TechnicalInform

ation

TRANSMISSION ERROR

Often referred to as kinematic error, this is the total error in the driven shaft position with regardto thedriving shaft position. In a system the following factors must be individually considered to determinetheir overall effect.

a. Backlash ........................................................ internal clearance relatedb. Torsional wind up .......................................... torsional stiffness relatedc. Velocity error .................................................. coupling design related

a. BacklashIs the amount of free rotational movement inherent in the coupling under zero or near zero torsionalloads. Only the Oldham coupling type in this catalogue is susceptible to slight backlash.

b. Torsional Wind UpIn applications where the resistance is frictional, the driven shaft will experience a position lag, whichwill double with direction reversal, proportional to the torsional stiffness.

During operating mode, the inertia and the torque will cause a momentary lag but this will not be seenat standstill.

c. Velocity ErrorIn general, couplings with double flexing elements (ReliaFlex®, Bellows and Twin disc couplings) willintroduce negligible velocity errors.

Velocity errors occur with angular misalignment and are proportional to shaft angle.Only the Oldham coupling type in this catalogue is susceptible to this error.

LUBRICATION

This is not required on any of the couplings in this catalogue.

FLOATING SHAFTS

We do not recommend the use of couplings in this catalogue for floating shafts, where one or bothends of a shaft are supported by a coupling.

Fixed shaft, supportedin 2 bearings.

Floating shaft, relies on thecoupling to support one end.WARNING: This arrangement isnot recommended.

TechnicalInformation

T83

Couplings


Tech

nica

lIn

form

atio

n

TORSIONAL RESONANCE

The torsional natural frequencies of a system are dependent on the mass/elastic characteristics of thevarious inertias and connecting shafts. Torsional resonance can occur under certain conditions whenthe natural frequency of the system is close to the excitation frequency of the driving system. It ismost likely to occur when the load is predominantly inertial and can occur in closed loop position orvelocity control systems, leading to torsional vibrations which in severe circumstances can destroy thecoupling.

Choosing a coupling that operates well above or well below the operating frequencies can help toavoid premature failure.

The resonant frequency of a system can be calculated from the following:

where FR = Resonant frequency (Hz)JM = Motor inertia (Kgm2)JL = Load inertia (Kgm2)CT = Coupling torsional stiffness (mNm/min)

RELIAFLEX® INSTALLATION

Couplings are available with either clamp or set screw mounting. Clamp fastening, both ReliaGrip™and traditional, allows repeated repositioning of the coupling on the shaft leaving the shaft unmarked.The effectiveness of the clamp is dependent on the diameter being a 'close' fit in the coupling bore.Use of Reliance components will ensure that the clamp works correctly.

Set screws provide an effective but nonadjustable means of connecting couplings and shafts. Ideallythe shafts should have a small flat in the area of the screw, which allows the set screw to seat belowthe surface of the shaft.

OLDHAM COUPLING, SOLID COUPLING AND COLLAR INSTALLATION

Oldham CouplingsEnsure that the misalignment between shafts is within the coupling's ratings. Slide a hub onto eachshaft to be joined with the drive tenons facing each other. Rotate the hubs on the shaft so the drivetenons are located 90° from each other. Place a torque disc so one groove fits over the drive tenonsof a hub and centre the disc by hand.

Insert a shim with the thickness of the coupling's axial motion rating into the groove of the torque disc.Slide the tenons of the second hub into the mating groove in the disc until it touches the shim stock.

Fully tighten the screw(s) on each hub to their recommended seating torque. Remove the shim stockto leave a small gap between the top of the drive tenons and the torque disc to allow for axialmovement.

TechnicalInformation Couplings

T84 Contact us for product information, design support and custom [email protected] +44 (0) 1484 601002 www.reliance.co.uk

TechnicalInform

ation

Solid CouplingsAlign the coupling on the two shafts to be connected. Tighten the Nypatch® clamp screws in twostages. Starting with the inside screws, tighten to half of the recommended seating torque. Repeat forthe outside screws, again tightening to half of the recommended seating torque (on twopiece collarsbe sure to maintain the gap between the two halves of the coupling during installation). Tightenscrews to the full recommended seating torque following the same pattern, beginning with the insidescrews.

CollarsUse collars as they are received. Wipe the bore clean and apply a thin coat of light oil to the shaft. Place collar in desired location onshaft and tighten the collar until a slight resistance is felt (on twopiece collars be sure to maintain thegap between the two halves of the collar during installation). Bring collar into final position and tightenscrews to the full recommended seating torque.

RG36 Issue A2

Documents

Flexible Shaft Couplings, Clutches and Collars€¦ · solid coupling will result in high shaft loading and significant bearing loads. In certain cases this misalignment is limited