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Bellows Couplings Shaft Collar in Shell
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BS - Set Screw Bellows Coupling
Set Screw Bellows Coupling

Features

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

Notes

  • Aluminum hubs are standard
  • Hubs also 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)
   distributor

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
Bellows Couplings
Clamp Bellows Coupling
Set Screw Bellows Coupling
Coupling Support Form
Product Index

  Click part number for 3D CAD file
Part
Number		 Bore 1
(in)		 Bore 2
(in)		 OD
(in)		 Length
L (in)		 Set
Screw		 Hub
Width
L1 (in)		 Static
Torque
(lb-in)		 Torsional
Stiffness
(lb-in/Deg)		 MISALIGNMENT
Angular (Deg) Parallel (in) Axial Motion (in)
BS10 2 (.1250) 2 (.1250) .590 1.073 M3 .340 22 72
1.50 .004 .008
3 (.1875) 3 (.1875)
4 (.2500) 4 (.2500)
BS12 3 (.1875) 3 (.1875) .750 1.224 M3 .410 40 120
1.50 .004 .010
4 (.2500) 4 (.2500)
5 (.3125) 5 (.3125)
BS16 4 (.2500) 4 (.2500) 1.000 1.338 M4 .467 60 244
1.50 .004 .012
5 (.3125) 5 (.3125)
6 (.3750) 6 (.3750)
8 (.5000) 8 (.5000)
BS21 5 (.3125) 5 (.3125) 1.313 1.623 M4 .590 120 400
1.50 .006 .016
6 (.3750) 6 (.3750)
8 (.5000) 8 (.5000)
10 (.6250) 10 (.6250)
BS26 6 (.3750) 6 (.3750) 1.625 2.029 M5 .710 250 550
2.00 .010 .020
8 (.5000) 8 (.5000)
10 (.6250) 10 (.6250)
12 (.7500) 12 (.7500)
BS32 8 (.5000) 8 (.5000) 2.000 2.315 M6 .810 400 950
2.00 .010 .020
10 (.6250) 10 (.6250)
12 (.7500) 12 (.7500)
14 (.8750) 14 (.8750)
16 (1.0000) 16 (1.0000)


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. Under normal/typical conditions the hubs are capable of holding up to the rated torque 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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