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

Aluminum Clamp 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)		 Cap
Screw		 Static
Torque
(lb-in)		 Torsional
Stiffness
(Deg/lb-in)		 Moment
of Inertia
(lb-in²)		 MISALIGNMENT
Angular Parallel (in) Axial Motion (in)
PCR6 3/32" to 3/32" 0.375 0.563 0.235 M1.6 5.5 1.340 0.0001
3° 0.008 0.005
PCR6-1.5-1.5-A 0.094 0.094 0.375 0.563 0.235 M1.6 5.5 1.340 0.0001
3° 0.008 0.005
PCR8 3/32" to 1/8" 0.500 0.750 0.265 M2 8 0.750 0.0004
3° 0.008 0.005
PCR8-1.5-1.5-A 0.094 0.094 0.500 0.750 0.265 M2 8 0.750 0.0004
3° 0.008 0.005
PCR8-2-1.5-A 0.125 0.094 8 0.750
PCR8-2-2-A 0.125 0.125 8 0.750
PCR10 1/8" tp 3/16" 0.625 0.800 0.336 M2 ≤ 15 ≤ 0.540 0.0011
3° 0.008 0.005
PCR10-2-2-A 0.125 0.125 0.625 0.800 0.336 M2 15 0.360 0.0011
3° 0.008 0.005
PCR10-2.5-2-A 0.156 0.125 12 0.540
PCR10-2.5-2.5-A 0.156 0.156 12 0.540
PCR10-3-2-A 0.188 0.125 12 0.540
PCR10-3-2.5-A 0.188 0.156 12 0.540
PCR10-3-3-A 0.188 0.188 12 0.540
PCR12 1/8" to 1/4" 0.750 0.900 0.386 M2.5 ≤ 26 ≤ 0.330 0.0025
3° 0.008 0.005
PCR12-2-2-A 0.125 0.125 0.750 0.900 0.386 M2.5 26 0.180 0.0025
3° 0.008 0.005
PCR12-2.5-2-A 0.156 0.125 17 0.260
PCR12-2.5-2.5-A 0.156 0.156 17 0.260
PCR12-3-2-A 0.188 0.125 17 0.260
PCR12-3-2.5-A 0.188 0.156 17 0.260
PCR12-3-3-A 0.188 0.188 17 0.260
PCR12-4-2-A 0.250 0.125 14 0.330
PCR12-4-2.5-A 0.250 0.156 14 0.330
PCR12-4-3-A 0.250 0.188 14 0.330
PCR12-4-4-A 0.250 0.250 14 0.330
PCR14 3/16" to 5/16" 0.875 1.063 0.450 M3 ≤ 20 ≤ 0.270 0.0056
3° 0.008 0.005
PCR14-3-3-A 0.188 0.188 0.875 1.063 0.450 M3 20 0.170 0.0056
3° 0.008 0.005
PCR14-4-3-A 0.250 0.188 18 0.210
PCR14-4-4-A 0.250 0.250 18 0.210
PCR14-5-3-A 0.313 0.188 16 0.270
PCR14-5-4-A 0.313 0.250 16 0.270
PCR14-5-5-A 0.313 0.313 16 0.270
PCR16 1/4" to 3/8" 1.000 1.250 0.545 M4 ≤ 36 ≤ 0.200 0.0116
3° 0.015 0.010
PCR16-4-4-A 0.250 0.250 1.000 1.250 0.545 M4 36 0.160 0.0116
3° 0.015 0.010
PCR16-5-4-A 0.313 0.250 33 0.180
PCR16-5-5-A 0.313 0.313 33 0.180
PCR16-6-4-A 0.375 0.250 30 0.200
PCR16-6-5-A 0.375 0.313 30 0.200
PCR16-6-6-A 0.375 0.375 30 0.200
PCR18 1/4" to 1/2" 1.125 1.500 0.670 M4 ≤ 47 ≤ 0.220 0.0217
3° 0.015 0.010
PCR18-4-4-A 0.250 0.250 1.125 1.500 0.670 M4 47 0.100 0.0217
3° 0.015 0.010
PCR18-5-4-A 0.313 0.250 44 0.110
PCR18-5-5-A 0.313 0.313 44 0.110
PCR18-6-4-A 0.375 0.250 40 0.140
PCR18-6-5-A 0.375 0.313 40 0.140
PCR18-6-6-A 0.375 0.375 40 0.140
PCR18-8-4-A 0.500 0.250 34 0.220
PCR18-8-5-A 0.500 0.313 34 0.220
PCR18-8-6-A 0.500 0.375 34 0.220
PCR18-8-8-A 0.500 0.500 34 0.220
PCR20 1/4" to 1/2" 1.250 1.500 0.670 M4 ≤ 68 ≤ 0.120 0.0340
3° 0.015 0.010
PCR20-4-4-A 0.250 0.250 1.250 1.500 0.670 M4 68 0.060 0.0340
3° 0.015 0.010
PCR20-5-4-A 0.313 0.250 64 0.060
PCR20-5-5-A 0.313 0.313 64 0.060
PCR20-6-4-A 0.375 0.250 60 0.070
PCR20-6-5-A 0.375 0.313 60 0.070
PCR20-6-6-A 0.375 0.375 60 0.070
PCR20-8-4-A 0.500 0.250 52 0.120
PCR20-8-5-A 0.500 0.313 52 0.120
PCR20-8-6-A 0.500 0.375 52 0.120
PCR20-8-8-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. 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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