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Flexible Beam Couplings Shaft Collar in Shell
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PSR Flexible Beam Coupling - Stainless Steel

Stainless Steel Set Screw Flexible Beam Coupling

Features

  • Flexible with low bearing loads
  • Corrosion resistant stainless steel
  • Multiple beam cuts improve parallel misalignment capabilities
  • Zero backlash
  • Constant velocity
  • Bore tolerance: +.001"/–.000"
  • Maximum speed: 6,000 RPM
  • Temperature range: -40°F to 350°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

Inch to Metric Bore Combinations

  • Beam couplings with inch to metric bore combinations are available by request
  • For help on inch to metric bore combinations please email


 
Flexible Beam Coupling
F-Series
Six Beam Coupling
P-Series
Four Beam Coupling
MW-Series:
Full Metric Dimensions
Coupling Support Form
Product Index
 
 
  Click Right Arrow to expand table | Click part number for 3D CAD file and pricing
Part
Number		 Bore
B1 (in)		 Bore
B2 (in)		 Outer
Diameter
OD (in)		 Length
L (in)		 Shaft
Penetration
(in)		 Cap
Screw		 Static
Torque
(lb-in)		 Torsional
Stiffness
(Deg/lb-in)		 Moment
of Inertia
(lb-in²)		 MISALIGNMENT
Angular Parallel (in) Axial Motion (in)
PSR6 3/32" to 3/32" 0.375 0.563 0.235 M2 7.5 0.751 0.0003
3° 0.008 0.005
PSR6-1.5-1.5-SS 0.094 0.094 0.375 0.563 0.235 M2 7.5 0.751 0.0003
3° 0.008 0.005
PSR8 3/32" to 1/8" 0.500 0.750 0.265 M2 11 0.368 0.0012
3° 0.008 0.005
PSR8-1.5-1.5-SS 0.094 0.094 0.500 0.750 0.265 M2 11 0.368 0.0012
3° 0.008 0.005
PSR8-2-1.5-SS 0.125 0.094 11 0.368
PSR8-2-2-SS 0.125 0.125 11 0.368
PSR10 1/8" tp 3/16" 0.625 0.800 0.336 M4 ≤ 20 ≤ 0.286 0.0030
3° 0.008 0.005
PSR10-2-2-SS 0.125 0.125 0.625 0.800 0.336 M4 20 0.184 0.0030
3° 0.008 0.005
PSR10-2.5-2-SS 0.156 0.125 16 0.286
PSR10-2.5-2.5-SS 0.156 0.156 16 0.286
PSR10-3-2-SS 0.188 0.125 16 0.286
PSR10-3-2.5-SS 0.188 0.156 16 0.286
PSR10-3-3-SS 0.188 0.188 16 0.286
PSR12 1/8" to 1/4" 0.750 0.900 0.386 M4 ≤ 35 ≤ 0.179 0.0070
3° 0.008 0.005
PSR12-2-2-SS 0.125 0.125 0.750 0.900 0.386 M4 35 0.085 0.0070
3° 0.008 0.005
PSR12-2.5-2-SS 0.156 0.125 23 0.151
PSR12-2.5-2.5-SS 0.156 0.156 23 0.151
PSR12-3-2-SS 0.188 0.125 23 0.151
PSR12-3-2.5-SS 0.188 0.156 23 0.151
PSR12-3-3-SS 0.188 0.188 23 0.151
PSR12-4-2-SS 0.250 0.125 19 0.179
PSR12-4-2.5-SS 0.250 0.156 19 0.179
PSR12-4-3-SS 0.250 0.188 19 0.179
PSR12-4-4-SS 0.250 0.250 19 0.179
PSR14 3/16" to 5/16" 0.875 1.063 0.450 M4 ≤ 27 ≤ 0.135 0.0157
3° 0.008 0.005
PSR14-3-3-SS 0.188 0.188 0.875 1.063 0.450 M4 27 0.091 0.0157
3° 0.008 0.005
PSR14-4-3-SS 0.250 0.188 24 0.107
PSR14-4-4-SS 0.250 0.250 24 0.107
PSR14-5-3-SS 0.313 0.188 22 0.135
PSR14-5-4-SS 0.313 0.250 22 0.135
PSR14-5-5-SS 0.313 0.313 22 0.135
PSR16 1/4" to 3/8" 1.000 1.250 0.545 M4 ≤ 49 ≤ 0.103 0.0317
3° 0.015 0.010
PSR16-4-4-SS 0.250 0.250 1.000 1.250 0.545 M4 49 0.079 0.0317
3° 0.015 0.010
PSR16-5-4-SS 0.313 0.250 44 0.094
PSR16-5-5-SS 0.313 0.313 44 0.094
PSR16-6-4-SS 0.375 0.250 41 0.103
PSR16-6-5-SS 0.375 0.313 41 0.103
PSR16-6-6-SS 0.375 0.375 41 0.103
PSR18 1/4" to 1/2" 1.125 1.500 0.670 M5 ≤ 63 ≤ 0.111 0.0603
3° 0.015 0.010
PSR18-4-4-SS 0.250 0.250 1.125 1.500 0.670 M5 63 0.053 0.0603
3° 0.015 0.010
PSR18-5-4-SS 0.313 0.250 60 0.056
PSR18-5-5-SS 0.313 0.313 60 0.056
PSR18-6-4-SS 0.375 0.250 54 0.071
PSR18-6-5-SS 0.375 0.313 54 0.071
PSR18-6-6-SS 0.375 0.375 54 0.071
PSR18-8-4-SS 0.500 0.250 46 0.111
PSR18-8-5-SS 0.500 0.313 46 0.111
PSR18-8-6-SS 0.500 0.375 46 0.111
PSR18-8-8-SS 0.500 0.500 46 0.111
PSR20 1/4" to 1/2" 1.250 1.500 0.670 M6 ≤ 92 ≤ 0.064 0.0922
3° 0.015 0.010
PSR20-4-4-SS 0.250 0.250 1.250 1.500 0.670 M6 92 0.031 0.0922
3° 0.015 0.010
PSR20-5-4-SS 0.313 0.250 86 0.037
PSR20-5-5-SS 0.313 0.313 86 0.037
PSR20-6-4-SS 0.375 0.250 81 0.044
PSR20-6-5-SS 0.375 0.313 81 0.044
PSR20-6-6-SS 0.375 0.375 81 0.044
PSR20-8-4-SS 0.500 0.250 70 0.064
PSR20-8-5-SS 0.500 0.313 70 0.064
PSR20-8-6-SS 0.500 0.375 70 0.064
PSR20-8-8-SS 0.500 0.500 70 0.064

 

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. PSR6, PSR8, PSR10, and PSR12 have one set screw on each end. PSR14, PSR16, PSR18, and PSR20 have two set screws on each end 120° apart.
Note 3 Performance ratings are for guidance only. The user must determine suitability for a particular application.
Note 4 Coupling torque and torsional stiffness are determined by the largest bore selected.
Note 5 Torque ratings for the couplings are based on the physical limitations/failure point of the machined beams. 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 machined beams. Keyways are available on straight bore couplings upon request. Please consult technical support for more assistance.

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