Flexible Beam Couplings
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PCR - Flexible Beam Coupling

Aluminum Clamp Flexible Beam Coupling

Features

  • Aluminum
    • Extra flexible with low bearing loads
    • Lightweight for low inertia
    • Temperature range: -40°F to 225°F
  • Stainless Steel
    • Flexible with low bearing loads
    • Corrosion resistant
    • Temperature range: -40°F to 350°F
  • Multiple beam cuts improve parallel misalignment capabilities
  • Zero backlash
  • Constant velocity
  • RoHS2 and REACH Compliant
  • Maximum speed: 6,000 RPM
  • Bore tolerance: +.025mm/–.000mm

How to Specify

Part numbers are in the following format with numbers representing sixteenths of an inch:

order pcr

Inch to Metric Bore Combinations

  • Inch to metric bore combinations are available on the P-Series Beam Coupling conversion page
  • For help on inch to metric bore combinations please email

 
 
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  Click part number for full technical specs, CAD files, and pricing
Part Number Material Large
Bore
B1 (in)
Small
Bore
B2 (in)
Outer
Diameter
OD (in)
Length
L (in)
Cap
Screw
Static
Torque
(lb-in)
Torsional
Stiffness
(Deg/lb-in)
Moment
of Inertia
(lb-in²)
Angular
(Deg)
Parallel
(in)
Axial
Motion
(in)
                       
PCR10-2.5-2.5-A Aluminum 0.156 0.156 0.625 0.800 M2 12 0.540 0.0011 0.008 0.005
PCR10-2.5-2.5-SS Stainless 0.156 0.156 0.625 0.800 M2 16 0.286 0.0030 0.008 0.005
PCR10-2.5-2-A Aluminum 0.156 0.125 0.625 0.800 M2 12 0.540 0.0011 0.008 0.005
PCR10-2.5-2-SS Stainless 0.156 0.125 0.625 0.800 M2 16 0.286 0.0030 0.008 0.005
PCR10-2-2-A Aluminum 0.125 0.125 0.625 0.800 M2 15 0.360 0.0011 0.008 0.005
PCR10-2-2-SS Stainless 0.125 0.125 0.625 0.800 M2 20 0.184 0.0030 0.008 0.005
PCR10-3-2.5-A Aluminum 0.188 0.156 0.625 0.800 M2 12 0.540 0.0011 0.008 0.005
PCR10-3-2.5-SS Stainless 0.188 0.156 0.625 0.800 M2 16 0.286 0.0030 0.008 0.005
PCR10-3-2-A Aluminum 0.188 0.125 0.625 0.800 M2 12 0.540 0.0011 0.008 0.005
PCR10-3-2-SS Stainless 0.188 0.125 0.625 0.800 M2 16 0.286 0.0030 0.008 0.005
PCR10-3-3-A Aluminum 0.188 0.188 0.625 0.800 M2 12 0.540 0.0011 0.008 0.005
PCR10-3-3-SS Stainless 0.188 0.188 0.625 0.800 M2 16 0.286 0.0030 0.008 0.005
PCR12-2.5-2.5-A Aluminum 0.156 0.156 0.750 0.900 M2.5 17 0.260 0.0025 0.008 0.005
PCR12-2.5-2.5-SS Stainless 0.156 0.156 0.750 0.900 M2.5 23 0.151 0.0070 0.008 0.005
PCR12-2.5-2-A Aluminum 0.156 0.125 0.750 0.900 M2.5 17 0.260 0.0025 0.008 0.005
PCR12-2.5-2-SS Stainless 0.156 0.125 0.750 0.900 M2.5 23 0.151 0.0070 0.008 0.005
PCR12-2-2-A Aluminum 0.125 0.125 0.750 0.900 M2.5 26 0.180 0.0025 0.008 0.005
PCR12-2-2-SS Stainless 0.125 0.125 0.750 0.900 M2.5 35 0.085 0.0070 0.008 0.005
PCR12-3-2.5-A Aluminum 0.188 0.156 0.750 0.900 M2.5 17 0.260 0.0025 0.008 0.005
PCR12-3-2.5-SS Stainless 0.188 0.156 0.750 0.900 M2.5 23 0.151 0.0070 0.008 0.005
PCR12-3-2-A Aluminum 0.188 0.125 0.750 0.900 M2.5 17 0.260 0.0025 0.008 0.005
PCR12-3-2-SS Stainless 0.188 0.125 0.750 0.900 M2.5 23 0.151 0.0070 0.008 0.005
PCR12-3-3-A Aluminum 0.188 0.188 0.750 0.900 M2.5 17 0.260 0.0025 0.008 0.005
PCR12-3-3-SS Stainless 0.188 0.188 0.750 0.900 M2.5 23 0.151 0.0070 0.008 0.005
PCR12-4-2.5-A Aluminum 0.250 0.156 0.750 0.900 M2.5 14 0.330 0.0025 0.008 0.005
PCR12-4-2.5-SS Stainless 0.250 0.156 0.750 0.900 M2.5 19 0.179 0.0070 0.008 0.005
PCR12-4-2-A Aluminum 0.250 0.125 0.750 0.900 M2.5 14 0.330 0.0025 0.008 0.005
PCR12-4-2-SS Stainless 0.250 0.125 0.750 0.900 M2.5 19 0.179 0.0070 0.008 0.005
PCR12-4-3-A Aluminum 0.250 0.188 0.750 0.900 M2.5 14 0.330 0.0025 0.008 0.005
PCR12-4-3-SS Stainless 0.250 0.188 0.750 0.900 M2.5 19 0.179 0.0070 0.008 0.005
PCR12-4-4-A Aluminum 0.250 0.250 0.750 0.900 M2.5 14 0.330 0.0025 0.008 0.005
PCR12-4-4-SS Stainless 0.250 0.250 0.750 0.900 M2.5 19 0.179 0.0070 0.008 0.005
PCR14-3-3-A Aluminum 0.188 0.188 0.875 1.063 M3 20 0.170 0.0056 0.008 0.005
PCR14-3-3-SS Stainless 0.188 0.188 0.875 1.063 M3 27 0.091 0.0157 0.008 0.005
PCR14-4-3-A Aluminum 0.250 0.188 0.875 1.063 M3 18 0.210 0.0056 0.008 0.005
PCR14-4-3-SS Stainless 0.250 0.188 0.875 1.063 M3 24 0.107 0.0157 0.008 0.005
PCR14-4-4-A Aluminum 0.250 0.250 0.875 1.063 M3 18 0.210 0.0056 0.008 0.005
PCR14-4-4-SS Stainless 0.250 0.250 0.875 1.063 M3 24 0.107 0.0157 0.008 0.005
PCR14-5-3-A Aluminum 0.313 0.188 0.875 1.063 M3 16 0.270 0.0056 0.008 0.005
PCR14-5-3-SS Stainless 0.313 0.188 0.875 1.063 M3 22 0.135 0.0157 0.008 0.005
PCR14-5-4-A Aluminum 0.313 0.250 0.875 1.063 M3 16 0.270 0.0056 0.008 0.005
PCR14-5-4-SS Stainless 0.313 0.250 0.875 1.063 M3 22 0.135 0.0157 0.008 0.005
PCR14-5-5-A Aluminum 0.313 0.313 0.875 1.063 M3 16 0.270 0.0056 0.008 0.005
PCR14-5-5-SS Stainless 0.313 0.313 0.875 1.063 M3 22 0.135 0.0157 0.008 0.005
PCR16-4-4-A Aluminum 0.250 0.250 1.000 1.250 M4 36 0.160 0.0116 0.015 0.010
PCR16-4-4-SS Stainless 0.250 0.250 1.000 1.250 M4 49 0.079 0.0317 0.015 0.010
PCR16-5-4-A Aluminum 0.313 0.250 1.000 1.250 M4 33 0.180 0.0116 0.015 0.010
PCR16-5-4-SS Stainless 0.313 0.250 1.000 1.250 M4 44 0.094 0.0317 0.015 0.010
PCR16-5-5-A Aluminum 0.313 0.313 1.000 1.250 M4 33 0.180 0.0116 0.015 0.010
PCR16-5-5-SS Stainless 0.313 0.313 1.000 1.250 M4 44 0.094 0.0317 0.015 0.010
PCR16-6-4-A Aluminum 0.375 0.250 1.000 1.250 M4 30 0.200 0.0116 0.015 0.010
PCR16-6-4-SS Stainless 0.375 0.250 1.000 1.250 M4 41 0.103 0.0317 0.015 0.010
PCR16-6-5-A Aluminum 0.375 0.313 1.000 1.250 M4 30 0.200 0.0116 0.015 0.010
PCR16-6-5-SS Stainless 0.375 0.313 1.000 1.250 M4 41 0.103 0.0317 0.015 0.010
PCR16-6-6-A Aluminum 0.375 0.375 1.000 1.250 M4 30 0.200 0.0116 0.015 0.010
PCR16-6-6-SS Stainless 0.375 0.375 1.000 1.250 M4 41 0.103 0.0317 0.015 0.010
PCR18-4-4-A Aluminum 0.250 0.250 1.125 1.500 M4 47 0.100 0.0217 0.015 0.010
PCR18-4-4-SS Stainless 0.250 0.250 1.125 1.500 M4 63 0.053 0.0603 0.015 0.010
PCR18-5-4-A Aluminum 0.313 0.250 1.125 1.500 M4 44 0.110 0.0217 0.015 0.010
PCR18-5-4-SS Stainless 0.313 0.250 1.125 1.500 M4 60 0.056 0.0603 0.015 0.010
PCR18-5-5-A Aluminum 0.313 0.313 1.125 1.500 M4 44 0.110 0.0217 0.015 0.010
PCR18-5-5-SS Stainless 0.313 0.313 1.125 1.500 M4 60 0.056 0.0603 0.015 0.010
PCR18-6-4-A Aluminum 0.375 0.250 1.125 1.500 M4 40 0.140 0.0217 0.015 0.010
PCR18-6-4-SS Stainless 0.375 0.250 1.125 1.500 M4 54 0.071 0.0603 0.015 0.010
PCR18-6-5-A Aluminum 0.375 0.313 1.125 1.500 M4 40 0.140 0.0217 0.015 0.010
PCR18-6-5-SS Stainless 0.375 0.313 1.125 1.500 M4 54 0.071 0.0603 0.015 0.010
PCR18-6-6-A Aluminum 0.375 0.375 1.125 1.500 M4 40 0.140 0.0217 0.015 0.010
PCR18-6-6-SS Stainless 0.375 0.375 1.125 1.500 M4 54 0.071 0.0603 0.015 0.010
PCR18-8-4-A Aluminum 0.500 0.250 1.125 1.500 M4 34 0.220 0.0217 0.015 0.010
PCR18-8-4-SS Stainless 0.500 0.250 1.125 1.500 M4 46 0.111 0.0603 0.015 0.010
PCR18-8-5-A Aluminum 0.500 0.313 1.125 1.500 M4 34 0.220 0.0217 0.015 0.010
PCR18-8-5-SS Stainless 0.500 0.313 1.125 1.500 M4 46 0.111 0.0603 0.015 0.010
PCR18-8-6-A Aluminum 0.500 0.375 1.125 1.500 M4 34 0.220 0.0217 0.015 0.010
PCR18-8-6-SS Stainless 0.500 0.375 1.125 1.500 M4 46 0.111 0.0603 0.015 0.010
PCR18-8-8-A Aluminum 0.500 0.500 1.125 1.500 M4 34 0.220 0.0217 0.015 0.010
PCR18-8-8-SS Stainless 0.500 0.500 1.125 1.500 M4 46 0.111 0.0603 0.015 0.010
PCR20-4-4-A Aluminum 0.250 0.250 1.250 1.500 M4 68 0.060 0.0340 0.015 0.010
PCR20-4-4-SS Stainless 0.250 0.250 1.250 1.500 M4 92 0.031 0.0922 0.015 0.010
PCR20-5-4-A Aluminum 0.313 0.250 1.250 1.500 M4 64 0.060 0.0340 0.015 0.010
PCR20-5-4-SS Stainless 0.313 0.250 1.250 1.500 M4 86 0.037 0.0922 0.015 0.010
PCR20-5-5-A Aluminum 0.313 0.313 1.250 1.500 M4 64 0.060 0.0340 0.015 0.010
PCR20-5-5-SS Stainless 0.313 0.313 1.250 1.500 M4 86 0.037 0.0922 0.015 0.010
PCR20-6-4-A Aluminum 0.375 0.250 1.250 1.500 M4 60 0.070 0.0340 0.015 0.010
PCR20-6-4-SS Stainless 0.375 0.250 1.250 1.500 M4 81 0.044 0.0922 0.015 0.010
PCR20-6-5-A Aluminum 0.375 0.313 1.250 1.500 M4 60 0.070 0.0340 0.015 0.010
PCR20-6-5-SS Stainless 0.375 0.313 1.250 1.500 M4 81 0.044 0.0922 0.015 0.010
PCR20-6-6-A Aluminum 0.375 0.375 1.250 1.500 M4 60 0.070 0.0340 0.015 0.010
PCR20-6-6-SS Stainless 0.375 0.375 1.250 1.500 M4 81 0.044 0.0922 0.015 0.010
PCR20-8-4-A Aluminum 0.500 0.250 1.250 1.500 M4 52 0.120 0.0340 0.015 0.010
PCR20-8-4-SS Stainless 0.500 0.250 1.250 1.500 M4 70 0.064 0.0922 0.015 0.010
PCR20-8-5-A Aluminum 0.500 0.313 1.250 1.500 M4 52 0.120 0.0340 0.015 0.010
PCR20-8-5-SS Stainless 0.500 0.313 1.250 1.500 M4 70 0.064 0.0922 0.015 0.010
PCR20-8-6-A Aluminum 0.500 0.375 1.250 1.500 M4 52 0.120 0.0340 0.015 0.010
PCR20-8-6-SS Stainless 0.500 0.375 1.250 1.500 M4 70 0.064 0.0922 0.015 0.010
PCR20-8-8-A Aluminum 0.500 0.500 1.250 1.500 M4 52 0.120 0.0340 0.015 0.010
PCR20-8-8-SS Stainless 0.500 0.500 1.250 1.500 M4 70 0.064 0.0922 0.015 0.010
PCR6-1.5-1.5-A Aluminum 0.094 0.094 0.375 0.563 M1.6 5.5 1.340 0.0001 0.008 0.005
PCR6-1.5-1.5-SS Stainless 0.094 0.094 0.375 0.563 M1.6 7.5 0.751 0.0003 0.008 0.005
PCR8-1.5-1.5-A Aluminum 0.094 0.094 0.500 0.750 M2 8 0.750 0.0004 0.008 0.005
PCR8-1.5-1.5-SS Stainless 0.094 0.094 0.500 0.750 M2 11 0.368 0.0012 0.008 0.005
PCR8-2-1.5-A Aluminum 0.125 0.094 0.500 0.750 M2 8 0.750 0.0004 0.008 0.005
PCR8-2-1.5-SS Stainless 0.125 0.094 0.500 0.750 M2 11 0.368 0.0012 0.008 0.005
PCR8-2-2-A Aluminum 0.125 0.125 0.500 0.750 M2 8 0.750 0.0004 0.008 0.005
PCR8-2-2-SS Stainless 0.125 0.125 0.500 0.750 M2 11 0.368 0.0012 0.008 0.005
 
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. Stainless steel hardware available upon request.
Note 2 Hardware is alloy steel with black oxide finish. PCR series parts have socketed head cap screws on each end.
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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