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Bellows Couplings Shaft Collar in Shell
grey block
 

BS - Set Screw Bellows Coupling
Set Screw Bellows Coupling BS Line Drawing

Features

  • High torque with low inertia
  • Balanced for high RPM
  • Long life with no maintenance
  • High torsional stiffness
  • Constant velocity
  • Zero backlash
  • Bore tolerance: +.001"/-.000"
  • Maximum speed: 10,000 RPM
  • Temperature Range: -40°F to 200°F

  		 

How to Specify

Choose any Bore 1 and any Bore 2 available in a body size. Part numbers are in the following format with numbers representing sixteenths of an inch:

order bc

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


 
Bellows Couplings
Clamp Style Coupling
Set Screw Coupling
- BS Inch Series
- MBS Metric Series
Coupling Support Form
Product Index
 
 
  Click Right Arrow to expand table | Click part number for 3D CAD file and pricing
Part Number Bore 1
B1 (in)		 Bore 2
B2 (in)		 Outer
Diameter
OD (in)		 Length
L (in)		 Hub
Width
LH (in)		 Clamp
Screw 		Static
Torque
(lb-in)		 Torsional
Stiffness
(lb-in/Deg)		 MISALIGNMENT
Angular (Deg) Parallel
(in)		 Axial Motion (in)
BS10 1/8" to 1/4" 0.590 1.073 0.340 M3 22 72
1.5° 0.004 0.008
BS10-2-2-A 0.125 0.125 0.590 1.073 0.340 M3 22 72
1.5° 0.004 0.008
BS10-3-2-A 0.188 0.125
BS10-3-3-A 0.188 0.188
BS10-4-2-A 0.250 0.125
BS10-4-3-A 0.250 0.188
BS10-4-4-A 0.250 0.250
BS12 3/16" to 5/16" 0.750 1.224 0.410 M3 40 120
1.5° 0.004 0.010
BS12-3-3-A 0.188 0.188 0.750 1.224 0.410 M3 40 120
1.5° 0.004 0.010
BS12-4-3-A 0.250 0.188
BS12-4-4-A 0.250 0.250
BS12-5-3-A 0.313 0.188
BS12-5-4-A 0.313 0.250
BS12-5-5-A 0.313 0.313
BS16 1/4" to 1/2" 1.000 1.338 0.467 M4 60 244
1.5° 0.004 0.012
BS16-4-4-A 0.250 0.250 1.000 1.338 0.467 M4 60 244
1.5° 0.004 0.012
BS16-5-4-A 0.313 0.250
BS16-5-5-A 0.313 0.313
BS16-6-4-A 0.375 0.250
BS16-6-5-A 0.375 0.313
BS16-6-6-A 0.375 0.375
BS16-8-4-A 0.500 0.250
BS16-8-5-A 0.500 0.313
BS16-8-6-A 0.500 0.375
BS16-8-8-A 0.500 0.500
BS21 5/16" to 5/8" 1.313 1.623 0.590 M4 120 400
1.5° 0.006 0.016
BS21-5-5-A 0.313 0.313 1.313 1.623 0.590 M4 120 400
1.5° 0.006 0.016
BS21-6-5-A 0.375 0.313
BS21-6-6-A 0.375 0.375
BS21-8-5-A 0.500 0.313
BS21-8-6-A 0.500 0.375
BS21-8-8-A 0.500 0.500
BS21-10-5-A 0.625 0.313
BS21-10-6-A 0.625 0.375
BS21-10-8-A 0.625 0.500
BS21-10-10-A 0.625 0.625
BS26 3/8" to 3/4" 1.625 2.029 0.710 M5 250 550
2° 0.010 0.020
BS26-6-6-A 0.375 0.375 1.625 2.029 0.710 M5 250 550
2° 0.010 0.020
BS26-8-6-A 0.500 0.375
BS26-8-8-A 0.500 0.500
BS26-10-6-A 0.625 0.375
BS26-10-8-A 0.625 0.500
BS26-10-10-A 0.625 0.625
BS26-12-6-A 0.750 0.375
BS26-12-8-A 0.750 0.500
BS26-12-10-A 0.750 0.625
BS26-12-12-A 0.750 0.750
BS32 1/2" to 1" 2.000 2.315 0.810 M6 400 950
2° 0.010 0.020
BS32-8-8-A 0.500 0.500 2.000 2.315 0.810 M6 400 950
2° 0.010 0.020
BS32-10-8-A 0.625 0.500
BS32-10-10-A 0.625 0.625
BS32-12-8-A 0.750 0.500
BS32-12-10-A 0.750 0.625
BS32-12-12-A 0.750 0.750
BS32-14-8-A 0.875 0.500
BS32-14-10-A 0.875 0.625
BS32-14-12-A 0.875 0.750
BS32-14-14-A 0.875 0.875
BS32-16-8-A 1.000 0.500
BS32-16-10-A 1.000 0.625
BS32-16-12-A 1.000 0.750
BS32-16-14-A 1.000 0.875
BS32-16-16-A 1.000 1.000

 

Note 1 Static torque ratings are at maximum misalignment. To obtain dynamic rating, static ratings should be divided by 2 for non-reversing applications and by 4 for reversing applications.
Note 2 Hardware is alloy steel with black oxide finish. Parts BS10 and BS12 have one set screw on each end. BS16, BS21, BS26 and BS32 have two set screws 90° apart.
Note 3 Performance ratings are for guidance only. The user must determine suitability for a particular application.
Note 4 Our standard couplings are supplied with black anodized aluminum hubs. Stainless steel hubs are available upon request.
Note 5 Torque ratings for the couplings are based on the physical limitations/failure point of the metal bellows. 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 metal bellows. 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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