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Oldham Couplings Shaft Collar in Shell
grey block
 

OST - Set Screw Oldham Coupling

Set Screw Oldham Coupling

Features

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

Notes

  • Aluminum hubs are standard
  • Hubs available in stainless steel
  • Inch and metric hubs (set screw or clamp) can be combined into a single coupling as long as they have the same outside diameter (OD)
Ruland Hub Size (OD) Equivalents
Inch
Metric
8
0.500"
=
13
12.7mm
10
0.590"
=
15
15.0mm
12
0.750"
=
19
19.1mm
16
1.000"
=
25
25.4mm
21
1.313"
=
33
33.3mm
26
1.625"
=
41
41.3mm
32
2.000"
=
51
50.8mm
36
2.250"
=
57
57.2mm
  distributor

How to Specify

For a complete coupling, order two hubs and one disk.

To order hubs, choose any bore size (inch, metric or mixed) available in the same outside diameter (OD). Part numbers are in the following format with an example of an inch to metric mixed coupling.

order ost

order most

To order disk, choose material type and outside diameter (OD). Inch dimensions are on the left side of the “/” and metric sizes are on the right. For example:

order od
Oldham Couplings
Clamp Oldham Coupling
Set Screw Oldham Coupling
Coupling Support Form
Product Index
 

THROUGH BORE HUBS

  Click part number for 3D CAD file
Aluminum Bore B (in) OD (in) Hub Length
LH (in)		 Coupling Length
(in)		 Shaft Penetration
(in)		 Set Screw
OST8-2-A .1250
0.500
0.222
0.625
0.222
M3
OST8-3-A
.1875
OST8-4-A .2500
OST12-3-A
.1875
0.750
0.300
0.875
0.300
M3
OST12-4-A
.2500
OST12-5-A
.3125
OST16-4-A
.2500
1.000
0.390
1.125
0.390
M4
OST16-5-A
.3125
OST16-6-A
.3750
OST16-8-A
.5000
OST21-5-A
.3125
1.313
0.590
1.875
0.590
M4
OST21-6-A
.3750
OST21-8-A
.5000
OST21-10-A
.6250
OST26-6-A
.3750
1.625
0.710
2.000
0.710
M5
OST26-8-A
.5000
OST26-10-A
.6250
OST26-12-A
.7500

DISKS

  Click part number for 3D CAD file
Part Number OD (in) Material Rated Torque
(lb-in)		 Torsional
Stiffness
(Deg/lb-in)		 Static Break
Torque
(lb-in)		 MISALIGNMENT
Angular (Deg) Parallel (in) Axial Motion (in)
 OD8/13-AT 0.500 Acetal 6 .072 34
0.5 0.004 0.002
OD12/19-AT 0.750 Acetal 20 .043 93
0.5 0.008 0.004
 OD16/25-AT 1.000 Acetal 42 .033 168
0.5 0.008 0.004
OD21/33-AT 1.313 Acetal 70 .009 350
0.5 0.008 0.006
OD26/41-AT 1.625 Acetal 130 .008 480
0.5 0.010 0.006
 OD32/51-AT 2.000 Acetal 250 .005 750
0.5 0.010 0.008
OD36/57-AT 2.250 Acetal 375 .003 1100
0.5 0.010 0.008
OD8/13-NL 0.500 Nylon 1.5 .290 25
0.5 0.004 0.002
OD12/19-NL 0.750 Nylon 5.0 .140 85
0.5 0.008 0.004
OD16/25-NL 1.000 Nylon 10.0 .126 140
0.5 0.008 0.004
OD21/33-NL 1.313 Nylon 18.0 .052 300
0.5 0.008 0.006
OD26/41-NL 1.625 Nylon 32.0 .037 400
0.5 0.010 0.006


Note 1 Hardware is alloy steel with black oxide finish. Parts OST8 and OST12 have one set screw. OST16, OST21 and OST26 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. Under normal/typical conditions the hubs are capable of holding up to the rated torque of the 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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