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Flexible Beam Couplings Shaft Collar in Shell
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PSR Flexible Beam Coupling - Aluminum

Aluminum Set Screw Flexible Beam Coupling

Features

  • Extra flexible with low bearing loads
  • Aluminum for low inertia
  • 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 225°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)		 Set
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 5.5 1.340 0.0001
3° 0.008 0.005
PSR6-1.5-1.5-A 0.094 0.094 0.375 0.563 0.235 M2 5.5 1.340 0.0001
3° 0.008 0.005
PSR8 3/32" to 1/8" 0.500 0.750 0.265 M2 8 0.750 0.0004
3° 0.008 0.005
PSR8-1.5-1.5-A 0.094 0.094 0.500 0.750 0.265 M2 8 0.750 0.0004
3° 0.008 0.005
PSR8-2-1.5-A 0.125 0.094 8 0.750
PSR8-2-2-A 0.125 0.125 8 0.750
PSR10 1/8" tp 3/16" 0.625 0.800 0.336 M3 ≤ 15 ≤ 0.540 0.0011
3° 0.008 0.005
PSR10-2-2-A 0.125 0.125 0.625 0.800 0.336 M3 15 0.360 0.0011
3° 0.008 0.005
PSR10-2.5-2-A 0.156 0.125 12 0.540
PSR10-2.5-2.5-A 0.156 0.156 12 0.540
PSR10-3-2-A 0.188 0.125 12 0.540
PSR10-3-2.5-A 0.188 0.156 12 0.540
PSR10-3-3-A 0.188 0.188 12 0.540
PSR12 1/8" to 1/4" 0.750 0.900 0.386 M4 ≤ 26 ≤ 0.330 0.0025
3° 0.008 0.005
PSR12-2-2-A 0.125 0.125 0.750 0.900 0.386 M4 26 0.180 0.0025
3° 0.008 0.005
PSR12-2.5-2-A 0.156 0.125 17 0.260
PSR12-2.5-2.5-A 0.156 0.156 17 0.260
PSR12-3-2-A 0.188 0.125 17 0.260
PSR12-3-2.5-A 0.188 0.156 17 0.260
PSR12-3-3-A 0.188 0.188 17 0.260
PSR12-4-2-A 0.250 0.125 14 0.330
PSR12-4-2.5-A 0.250 0.156 14 0.330
PSR12-4-3-A 0.250 0.188 14 0.330
PSR12-4-4-A 0.250 0.250 14 0.330
PSR14 3/16" to 5/16" 0.875 1.063 0.450 M4 ≤ 20 ≤ 0.270 0.0056
3° 0.008 0.005
PSR14-3-3-A 0.188 0.188 0.875 1.063 0.450 M4 20 0.170 0.0056
3° 0.008 0.005
PSR14-4-3-A 0.250 0.188 18 0.210
PSR14-4-4-A 0.250 0.250 18 0.210
PSR14-5-3-A 0.313 0.188 16 0.270
PSR14-5-4-A 0.313 0.250 16 0.270
PSR14-5-5-A 0.313 0.313 16 0.270
PSR16 1/4" to 3/8" 1.000 1.250 0.545 M4 ≤ 36 ≤ 0.200 0.0116
3° 0.015 0.010
PSR16-4-4-A 0.250 0.250 1.000 1.250 0.545 M4 36 0.160 0.0116
3° 0.015 0.010
PSR16-5-4-A 0.313 0.250 33 0.180
PSR16-5-5-A 0.313 0.313 33 0.180
PSR16-6-4-A 0.375 0.250 30 0.200
PSR16-6-5-A 0.375 0.313 30 0.200
PSR16-6-6-A 0.375 0.375 30 0.200
PSR18 1/4" to 1/2" 1.125 1.500 0.670 M5 ≤ 47 ≤ 0.220 0.0217
3° 0.015 0.010
PSR18-4-4-A 0.250 0.250 1.125 1.500 0.670 M5 47 0.100 0.0217
3° 0.015 0.010
PSR18-5-4-A 0.313 0.250 44 0.110
PSR18-5-5-A 0.313 0.313 44 0.110
PSR18-6-4-A 0.375 0.250 40 0.140
PSR18-6-5-A 0.375 0.313 40 0.140
PSR18-6-6-A 0.375 0.375 40 0.140
PSR18-8-4-A 0.500 0.250 34 0.220
PSR18-8-5-A 0.500 0.313 34 0.220
PSR18-8-6-A 0.500 0.375 34 0.220
PSR18-8-8-A 0.500 0.500 34 0.220
PSR20 1/4" to 1/2" 1.250 1.500 0.670 M6 ≤ 68 ≤ 0.120 0.0340
3° 0.015 0.010
PSR20-4-4-A 0.250 0.250 1.250 1.500 0.670 M6 68 0.060 0.0340
3° 0.015 0.010
PSR20-5-4-A 0.313 0.250 64 0.060
PSR20-5-5-A 0.313 0.313 64 0.060
PSR20-6-4-A 0.375 0.250 60 0.070
PSR20-6-5-A 0.375 0.313 60 0.070
PSR20-6-6-A 0.375 0.375 60 0.070
PSR20-8-4-A 0.500 0.250 52 0.120
PSR20-8-5-A 0.500 0.313 52 0.120
PSR20-8-6-A 0.500 0.375 52 0.120
PSR20-8-8-A 0.500 0.500 52 0.120

 

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 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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