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Beam Couplings: Four-Beam P-Series, Inch to Metric
Clamp style P-Series four beam couplings (also referred to as helical couplings) with inch to metric bores. Bore sizes range from 0.94" to 1/2" and from 3mm to 12mm.
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
Ideal for encoder feedback systems
Zero backlash, Constant velocity
RoHS3 and REACH Compliant
Maximum speed: 6,000 RPM
Bore tolerance:
+.001 in / -.000 in
+.025mm/–.000mm
Temperature range: -40°F to 225°F
How to Specify Part numbers are in the following format with numbers representing sixteenths of an inch and millimeters:
Products
Download CAD File:
PCR10-4MM-1/8\"-A
PCR10-4MM-1/8"-A
As low as
$32.53
$47.70
Ruland PCR10-4MM-1/8"-A, 4mm x 1/8" Four Beam Coupling, Aluminum, Clamp Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PCR10-4MM-5/32\"-A
PCR10-4MM-5/32"-A
As low as
$32.53
$47.70
Ruland PCR10-4MM-5/32"-A, 4mm x 5/32" Four Beam Coupling, Aluminum, Clamp Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PCR10-5MM-1/8\"-A
PCR10-5MM-1/8"-A
As low as
$32.53
$47.70
Ruland PCR10-5MM-1/8"-A, 5mm x 1/8" Four Beam Coupling, Aluminum, Clamp Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PCR10-5MM-3/16\"-A
PCR10-5MM-3/16"-A
As low as
$32.53
$47.70
Ruland PCR10-5MM-3/16"-A, 5mm x 3/16" Four Beam Coupling, Aluminum, Clamp Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PCR10-5MM-5/32\"-A
PCR10-5MM-5/32"-A
As low as
$32.53
$47.70
Ruland PCR10-5MM-5/32"-A, 5mm x 5/32" Four Beam Coupling, Aluminum, Clamp Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PCR18-3/8\"-6MM-SS
PCR18-3/8"-6MM-SS
As low as
$119.59
$175.40
Ruland PCR18-3/8"-6MM-SS, 3/8" x 6mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR18-3/8\"-7MM-SS
PCR18-3/8"-7MM-SS
As low as
$119.59
$175.40
Ruland PCR18-3/8"-7MM-SS, 3/8" x 7mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR18-3/8\"-8MM-SS
PCR18-3/8"-8MM-SS
As low as
$119.59
$175.40
Ruland PCR18-3/8"-8MM-SS, 3/8" x 8mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR18-3/8\"-9MM-SS
PCR18-3/8"-9MM-SS
As low as
$119.59
$175.40
Ruland PCR18-3/8"-9MM-SS, 3/8" x 9mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR10-4MM-1/8\"-A
PSR10-4MM-1/8"-A
As low as
$27.28
$40.01
Ruland PSR10-4MM-1/8"-A, 4mm x 1/8" Four Beam Coupling, Aluminum, Set Screw Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PSR10-4MM-5/32\"-A
PSR10-4MM-5/32"-A
As low as
$27.28
$40.01
Ruland PSR10-4MM-5/32"-A, 4mm x 5/32" Four Beam Coupling, Aluminum, Set Screw Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PSR10-5MM-1/8\"-A
PSR10-5MM-1/8"-A
As low as
$27.28
$40.01
Ruland PSR10-5MM-1/8"-A, 5mm x 1/8" Four Beam Coupling, Aluminum, Set Screw Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PSR10-5MM-3/16\"-A
PSR10-5MM-3/16"-A
As low as
$27.28
$40.01
Ruland PSR10-5MM-3/16"-A, 5mm x 3/16" Four Beam Coupling, Aluminum, Set Screw Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PSR10-5MM-5/32\"-A
PSR10-5MM-5/32"-A
As low as
$27.28
$40.01
Ruland PSR10-5MM-5/32"-A, 5mm x 5/32" Four Beam Coupling, Aluminum, Set Screw Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PSR18-3/8\"-6MM-SS
PSR18-3/8"-6MM-SS
As low as
$110.57
$162.16
Ruland PSR18-3/8"-6MM-SS, 3/8" x 6mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR18-3/8\"-7MM-SS
PSR18-3/8"-7MM-SS
As low as
$110.57
$162.16
Ruland PSR18-3/8"-7MM-SS, 3/8" x 7mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR18-3/8\"-8MM-SS
PSR18-3/8"-8MM-SS
As low as
$110.57
$162.16
Ruland PSR18-3/8"-8MM-SS, 3/8" x 8mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR18-3/8\"-9MM-SS
PSR18-3/8"-9MM-SS
As low as
$110.57
$162.16
Ruland PSR18-3/8"-9MM-SS, 3/8" x 9mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
PCR10-4MM-1/8"-A
4 mm
0.1250 in
0.800 in (20.3 mm)
Aluminum
0.625 in (15.9 mm)
6,000 RPM
PCR10-4MM-5/32"-A
4 mm
0.1563 in
0.800 in (20.3 mm)
Aluminum
0.625 in (15.9 mm)
6,000 RPM
PCR10-5MM-1/8"-A
5 mm
0.1250 in
0.800 in (20.3 mm)
Aluminum
0.625 in (15.9 mm)
6,000 RPM
PCR10-5MM-3/16"-A
5 mm
0.1875 in
0.800 in (20.3 mm)
Aluminum
0.625 in (15.9 mm)
6,000 RPM
PCR10-5MM-5/32"-A
5 mm
0.1563 in
0.800 in (20.3 mm)
Aluminum
0.625 in (15.9 mm)
6,000 RPM
PCR18-3/8"-6MM-SS
0.3750 in
6 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.125 in (28.6 mm)
6,000 RPM
PCR18-3/8"-7MM-SS
0.3750 in
7 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.125 in (28.6 mm)
6,000 RPM
PCR18-3/8"-8MM-SS
0.3750 in
8 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.125 in (28.6 mm)
6,000 RPM
PCR18-3/8"-9MM-SS
0.3750 in
9 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.125 in (28.6 mm)
6,000 RPM
PSR10-4MM-1/8"-A
4 mm
0.1250 in
0.800 in (20.3 mm)
Aluminum
0.625 in (15.9 mm)
6,000 RPM
PSR10-4MM-5/32"-A
4 mm
0.1563 in
0.800 in (20.3 mm)
Aluminum
0.625 in (15.9 mm)
6,000 RPM
PSR10-5MM-1/8"-A
5 mm
0.1250 in
0.800 in (20.3 mm)
Aluminum
0.625 in (15.9 mm)
6,000 RPM
PSR10-5MM-3/16"-A
5 mm
0.1875 in
0.800 in (20.3 mm)
Aluminum
0.625 in (15.9 mm)
6,000 RPM
PSR10-5MM-5/32"-A
5 mm
0.1563 in
0.800 in (20.3 mm)
Aluminum
0.625 in (15.9 mm)
6,000 RPM
PSR18-3/8"-6MM-SS
0.3750 in
6 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.125 in (28.6 mm)
6,000 RPM
PSR18-3/8"-7MM-SS
0.3750 in
7 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.125 in (28.6 mm)
6,000 RPM
PSR18-3/8"-8MM-SS
0.3750 in
8 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.125 in (28.6 mm)
6,000 RPM
PSR18-3/8"-9MM-SS
0.3750 in
9 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.125 in (28.6 mm)
6,000 RPM
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Static Torque
54 lb-in (6.10 Nm)
Static Torque
12.0 lb-in (1.36 Nm)
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