Oldham Couplings
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Oldham Coupling Hubs

Clamp Style Oldham Coupling Clamp Style Hub
   
Set Screw Oldham Coupling Set Screw Hub
 
Clamp Style Line Drawing
 
Set Screw Line Drawing

Features

  • Large parallel misalignment
  • Electrically isolating
  • Replaceable disk
  • Balanced design
  • Constant velocity
  • RoHS2 and REACH Compliant
  • Maximum speed: 4,500 RPM
  • Bore tolerance: +.001"/-.000"
  • Temperature range (Deg. F)
    with Acetal Disk: -10° to 150°
    with Nylon Disk: -10° to 130°
 

How to Order

Complete Coupling: Oldham couplings are an assembly of two hubs and one disk

Hubs: Choose two hubs in inch or metric in any style with the same outside diameter

Disk: Choose disk to match performance criteria. The disk must have the same outside diameter as both hubs.

Each hub and disk is sold separately

Material

  • Aluminum hubs are standard
  • Stainless steel hubs are available upon request

Inch to Metric Bore Combinations

  • Inch and metric hubs with the same outside diameter can be combined into a single coupling
  • For help on inch to metric bore combinations please email


 
 
 
  Oldham Coupling Hubs | Click part number for CAD files, technical specs, and pricing
Clamp Style Set Screw Bore
B
Use with Disk Outer
Diameter
OD
Hub
Length
LH
Coupling
Length
L
Shaft
Penetration
Clamp Screw Set
Screw
Clamp Style
with Keyway
Set Screw
with Keyway
Keyway
- OST8
MOST13
1/8" - 1/4"
3 - 6mm
OD8/13 0.500"
12.7mm
0.222"
5.6mm
0.625"
15.9mm
0.222"
5.6mm
- M3 - - -
- OST8-2-A 0.125" OD8/13 0.500"/
12.7mm
0.222"/
5.6mm
0.625"/
15.9mm
0.222"/
5.6mm
- M3 - - -
- OST8-3-A 0.188"
- OST8-4-A 0.250"
- MOST13-3-A 3mm - - -
- MOST13-4-A 4mm
- MOST13-5-A 5mm
- MOST13-6-A 6mm
OCT12
MOCT19
OST12
MOST19
3/16" - 5/16"
4 - 8mm
OD12/19 0.750"
19.1mm
Lengths Differ by Style* M2.5 M3 - - -
OCT12-3-A OST12-3-A 0.188" OD12/19 0.750"/
19.1mm
Clamp
0.380"/
9.7mm

Set Screw
0.300"/
7.6mm
Clamp
1.000"/
25.4mm

Set Screw
0.875"/
22.2mm
Clamp
0.380"/
9.7mm

Set Screw
0.300"/
7.6mm
M2.5 M3 - - -
OCT12-4-A OST12-4-A 0.250"
OCT12-5-A OST12-5-A 0.313"
MOCT19-4-A MOST19-4-A 4mm - - -
MOCT19-5-A MOST19-5-A 5mm
MOCT19-6-A MOST19-6-A 6mm
MOCT19-7-A MOST19-7-A 7mm
MOCT19-8-A MOST19-8-A 8mm
OCT16
MOCT25
OST16
MOST25
1/4" - 1/2"
6 - 12mm
OD16/25 1.000"
25.4mm
Lengths Differ by Style* M3 M4 OCC16
MOCC25
OSC16
MOSC25
3/32" - 1/8"
2 - 4mm
OCT16-4-A OST16-4-A 0.250" OD16/25 1.000"/
25.4mm
Clamp
0.467"/
11.9mm

Set Screw
0.390"/
9.9mm
Clamp
1.250"/
31.8mm

Set Screw
1.125"/
28.6mm
Clamp
0.467"/
11.9mm

Set Screw
0.390"/
9.9mm
M3 M4 - - -
OCT16-5-A OST16-5-A 0.313" - - -
OCT16-6-A OST16-6-A 0.375" OCC16-6-A OSC16-6-A 3/32"
OCT16-8-A OST16-8-A 0.500" OCC16-8-A OSC16-8-A 1/8"
MOCT25-6-A MOST25-6-A 6mm - - -
MOCT25-7-A MOST25-7-A 7mm MOCC25-7-A MOSC25-7-A 2mm
MOCT25-8-A MOST25-8-A 8mm MOCC25-8-A MOSC25-8-A 2mm
MOCT25-9-A MOST25-9-A 9mm MOCC25-9-A MOSC25-9-A 3mm
MOCT25-10-A MOST25-10-A 10mm MOCC25-10-A MOSC25-10-A 3mm
MOCT25-11-A MOST25-11-A 11mm MOCC25-11-A MOSC25-11-A 4mm
MOCT25-12-A MOST25-12-A 12mm MOCC25-12-A MOSC25-12-A 4mm
OCT21
MOCT33
OST21
MOST33
5/16" - 5/8"
8 - 16mm
OD21/33 1.313"
33.3mm
0.590"
15.0mm
1.875"
47.6mm
0.590"
15.0mm
M3 M4 OCC21
MOCC33
OSC21
MOSC33
3/32" - 3/16"
2 - 5mm
OCT26
MOCT41
OST26
MOST41
3/8" - 3/4"
10 - 20mm
OD26/41 1.625"
41.3mm
0.710"
18.0mm
2.000"
50.8mm
0.710"
18.0mm
M4 M5 OCC26
MOCC41
OSC26
MOSC41
3/32" - 3/16"
3 - 6mm
OCT32
MOCT51
- 1/2" - 1"
12 - 25mm
OD32/51 2.000"
50.8mm
0.820"
20.8mm
2.350"
59.7mm
0.820"
20.8mm
M5 - OCC32
MOCC51
- 1/8" - 1/4"
4 - 8mm
OCT32-8-A - 0.500" OD32/51 2.000"/
50.8mm
0.820"/
20.8mm
2.350"/
59.7mm
0.820"/
20.8mm
M5 - OCC32-8-A - 1/8"
OCT32-10-A - 0.625" OCC32-10-A - 3/16"
OCT32-12-A - 0.750" OCC32-12-A - 3/16"
OCT32-14-A - 0.875" OCC32-14-A - 3/16"
OCT32-16-A - 1.000" OCC32-16-A - 1/4"
MOCT51-12-A - 12mm MOCC51-12-A - 4mm
MOCT51-13-A - 13mm MOCC51-13-A - 5mm
MOCT51-14-A - 14mm MOCC51-14-A - 5mm
MOCT51-15-A - 15mm MOCC51-15-A - 5mm
MOCT51-16-A - 16mm MOCC51-16-A - 5mm
MOCT51-17-A - 17mm MOCC51-17-A - 5mm
MOCT51-18-A - 18mm MOCC51-18-A - 6mm
MOCT51-19-A - 19mm MOCC51-19-A - 6mm
MOCT51-20-A - 20mm MOCC51-20-A - 6mm
MOCT51-22-A - 22mm MOCC51-22-A - 6mm
MOCT51-24-A - 24mm MOCC51-24-A - 8mm
MOCT51-25-A - 25mm MOCC51-25-A - 8mm
OCT36
MOCT57
- 1/2" - 1-1/8"
14 - 30mm
OD36/57 2.250"
57.2mm
1.130"
28.7mm
3.100"
78.7mm
1.130"
28.7mm
M6 - OCC36
MOCC57
- 1/8" - 1/4"
5 - 8mm
OCT36-8-A - 0.500" OD36/57 2.250"/
57.2mm
1.130"/
28.7mm
3.100"/
78.7mm
1.130"/
28.7mm
M6 - OCC36-8-A - 1/8"
OCT36-10-A - 0.625" OCC36-10-A - 3/16"
OCT36-12-A - 0.750" OCC36-12-A - 3/16"
OCT36-14-A - 0.875" OCC36-14-A - 3/16"
OCT36-16-A - 1.000" OCC36-16-A - 1/4"
OCT36-18-A - 1.125" OCC36-18-A - 1/4"
MOCT57-14-A - 14mm MOCC57-14-A - 5mm
MOCT57-15-A - 15mm MOCC57-15-A - 5mm
MOCT57-16-A - 16mm MOCC57-16-A - 5mm
MOCT57-17-A - 17mm MOCC57-17-A - 5mm
MOCT57-18-A - 18mm MOCC57-18-A - 6mm
MOCT57-19-A - 19mm MOCC57-19-A - 6mm
MOCT57-20-A - 20mm MOCC57-20-A - 6mm
MOCT57-22-A - 22mm MOCC57-22-A - 6mm
MOCT57-24-A - 24mm MOCC57-24-A - 8mm
MOCT57-25-A - 25mm MOCC57-25-A - 8mm
MOCT57-28-A - 28mm MOCC57-28-A - 8mm
MOCT57-30-A - 30mm MOCC57-30-A - 8mm

  Oldham Coupling Disks | Click part number for CAD files, technical specs, and pricing
Part Number Material Outside
Diameter
OD
Torsional
Stiffness
Rated
Torque
Static Break
Torque
MISALIGNMENT
Angular Rated Parallel† Max Parallel Axial Motion
Deg/lb-in Deg/Nm
lb-in Nm
lb-in Nm
Deg
in mm
in mm
in mm
OD8/13-AT Acetal 0.500"/
12.7mm
0.072 0.636
6 0.68
34 3.9
0.5°
0.004 0.10
0.050 1.27
0.002 0.05
OD8/13-NL Nylon
0.290 2.560
1.5 0.17
25 2.8
OD8/13-PEK Peek
- -
- -
- -
OD12/19-AT Acetal 0.750"/
19.1mm
0.043 0.380
20 2.25
93 10.5
0.5°
0.008 0.20
0.075 1.91
0.004 0.10
OD12/19-NL Nylon
0.140 1.240
5 0.57
85 9.6
OD12/19-PEK Peek
- -
- -
- -
OD16/25-AT Acetal 1.000"/
25.4mm
0.033 0.291
42 4.75
168 19.0
0.5°
0.008 0.20
0.100 2.54
0.004 0.10
OD16/25-NL Nylon
0.126 1.110
10 1.13
140 15.9
OD16/25-PEK Peek
- -
- -
- -
OD21/33-AT Acetal 1.313"/
33.3mm
0.009 0.079
70 8.00
350 39.5
0.5°
0.008 0.20
0.131 3.33
0.006 0.15
OD21/33-NL Nylon
0.052 0.460
18 2.05
300 34.0
OD21/33-PEK Peek
- -
- -
- -
OD26/41-AT Acetal 1.625"/
41.3mm
0.008 0.068
130 14.75
480 54.5
0.5°
0.010 0.25
0.163 4.13
0.006 0.15
OD26/41-NL Nylon
0.037 0.330
32 3.65
400 45.3
OD26/41-PEK Peek
- -
- -
- -
OD32/51-AT Acetal 2.000"/
50.8mm
0.005 0.044
250 28.50
750 85.0
0.5°
0.010 0.25
0.200 5.08
0.008 0.20
OD32/51-PEK Peek
- -
- -
- -
OD36/57-AT Acetal 2.250"/
57.2mm
0.003 0.027
375 42.50
1100 125.0
0.5°
0.010 0.25
0.225 5.72
0.008 0.20
OD36/57-PEK Peek
- -
- -
- -

 

Note * Shaft lengths and penetration vary between clamp and set screw style hubs.
Note † Recommended rating for maximum life. Maximum allowable parallel misalignment is 10% the outside diameter.
Note 1 Hardware is alloy steel with black oxide finish. Parts OST8, MOST13, OST12, MOST19 have one set screw. OST16, MOST25, OST21, MOST33, OST26 and MOST41 have two set screws 90° apart.
Note 2 Performance ratings are for guidance only. The user must determine suitability for a particular application.
Note 3 Couplings supplied with black anodized aluminum hubs.
Note 4 Torque ratings for the couplings are based on the physical limitations/failure point of the torque disks. In some cases, especially when the smallest standard bores are used or where shafts are undersized, slippage on the shaft is possible below the rated torque of the disks. Keyways are available to provide additional torque capacity in the shaft/hub connection when required. Please consult technical support for more assistance.

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