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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:
PCR10-1/8-3MM-SS
PCR10-1/8-3MM-SS
As low as
$89.78
$131.68
Ruland PCR10-1/8"-3MM-SS, 1/8" x 3mm Four Beam Coupling, Stainless Steel, Clamp Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PCR20-1/2\"-10MM-A
PCR20-1/2"-10MM-A
As low as
$58.15
$85.29
Ruland PCR20-1/2"-10MM-A, 1/2" x 10mm Four Beam Coupling, Aluminum, Clamp Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR20-1/2\"-11MM-A
PCR20-1/2"-11MM-A
As low as
$58.15
$85.29
Ruland PCR20-1/2"-11MM-A, 1/2" x 11mm Four Beam Coupling, Aluminum, Clamp Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR20-1/2\"-12MM-A
PCR20-1/2"-12MM-A
As low as
$58.15
$85.29
Ruland PCR20-1/2"-12MM-A, 1/2" x 12mm Four Beam Coupling, Aluminum, Clamp Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR20-1/2\"-6MM-A
PCR20-1/2"-6MM-A
As low as
$58.15
$85.29
Ruland PCR20-1/2"-6MM-A, 1/2" x 6mm Four Beam Coupling, Aluminum, Clamp Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR20-1/2\"-7MM-A
PCR20-1/2"-7MM-A
As low as
$58.15
$85.29
Ruland PCR20-1/2"-7MM-A, 1/2" x 7mm Four Beam Coupling, Aluminum, Clamp Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR20-1/2\"-8MM-A
PCR20-1/2"-8MM-A
As low as
$58.15
$85.29
Ruland PCR20-1/2"-8MM-A, 1/2" x 8mm Four Beam Coupling, Aluminum, Clamp Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR20-1/2\"-9MM-A
PCR20-1/2"-9MM-A
As low as
$58.15
$85.29
Ruland PCR20-1/2"-9MM-A, 1/2" x 9mm Four Beam Coupling, Aluminum, Clamp Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR10-1/8\"-3MM-SS
PSR10-1/8"-3MM-SS
As low as
$80.07
$117.44
Ruland PSR10-1/8"-3MM-SS, 1/8" x 3mm Four Beam Coupling, Stainless Steel, Set Screw Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PSR20-1/2\"-10MM-A
PSR20-1/2"-10MM-A
As low as
$50.14
$73.54
Ruland PSR20-1/2"-10MM-A, 1/2" x 10mm Four Beam Coupling, Aluminum, Set Screw Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR20-1/2\"-11MM-A
PSR20-1/2"-11MM-A
As low as
$50.14
$73.54
Ruland PSR20-1/2"-11MM-A, 1/2" x 11mm Four Beam Coupling, Aluminum, Set Screw Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR20-1/2\"-12MM-A
PSR20-1/2"-12MM-A
As low as
$50.14
$73.54
Ruland PSR20-1/2"-12MM-A, 1/2" x 12mm Four Beam Coupling, Aluminum, Set Screw Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR20-1/2\"-6MM-A
PSR20-1/2"-6MM-A
As low as
$50.14
$73.54
Ruland PSR20-1/2"-6MM-A, 1/2" x 6mm Four Beam Coupling, Aluminum, Set Screw Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR20-1/2\"-7MM-A
PSR20-1/2"-7MM-A
As low as
$50.14
$73.54
Ruland PSR20-1/2"-7MM-A, 1/2" x 7mm Four Beam Coupling, Aluminum, Set Screw Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR20-1/2\"-8MM-A
PSR20-1/2"-8MM-A
As low as
$50.14
$73.54
Ruland PSR20-1/2"-8MM-A, 1/2" x 8mm Four Beam Coupling, Aluminum, Set Screw Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR20-1/2\"-9MM-A
PSR20-1/2"-9MM-A
As low as
$50.14
$73.54
Ruland PSR20-1/2"-9MM-A, 1/2" x 9mm Four Beam Coupling, Aluminum, Set Screw Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
PCR10-1/8-3MM-SS
0.1250 in
3 mm
0.800 in (20.3 mm)
303 Stainless Steel
0.625 in (15.9 mm)
6,000 RPM
PCR20-1/2"-10MM-A
0.5000 in
10 mm
1.500 in (38.1 mm)
Aluminum
1.250 in (31.8 mm)
6,000 RPM
PCR20-1/2"-11MM-A
0.5000 in
11 mm
1.500 in (38.1 mm)
Aluminum
1.250 in (31.8 mm)
6,000 RPM
PCR20-1/2"-12MM-A
0.5000 in
12 mm
1.500 in (38.1 mm)
Aluminum
1.250 in (31.8 mm)
6,000 RPM
PCR20-1/2"-6MM-A
0.5000 in
6 mm
1.500 in (38.1 mm)
Aluminum
1.250 in (31.8 mm)
6,000 RPM
PCR20-1/2"-7MM-A
0.5000 in
7 mm
1.500 in (38.1 mm)
Aluminum
1.250 in (31.8 mm)
6,000 RPM
PCR20-1/2"-8MM-A
0.5000 in
8 mm
1.500 in (38.1 mm)
Aluminum
1.250 in (31.8 mm)
6,000 RPM
PCR20-1/2"-9MM-A
0.5000 in
9 mm
1.500 in (38.1 mm)
Aluminum
1.250 in (31.8 mm)
6,000 RPM
PSR10-1/8"-3MM-SS
0.1250 in
3 mm
0.800 in (20.3 mm)
303 Stainless Steel
0.625 in (15.9 mm)
6,000 RPM
PSR20-1/2"-10MM-A
0.5000 in
10 mm
1.500 in (38.1 mm)
Aluminum
1.250 in (31.8 mm)
6,000 RPM
PSR20-1/2"-11MM-A
0.5000 in
11 mm
1.500 in (38.1 mm)
Aluminum
1.250 in (31.8 mm)
6,000 RPM
PSR20-1/2"-12MM-A
0.5000 in
12 mm
1.500 in (38.1 mm)
Aluminum
1.250 in (31.8 mm)
6,000 RPM
PSR20-1/2"-6MM-A
0.5000 in
6 mm
1.500 in (38.1 mm)
Aluminum
1.250 in (31.8 mm)
6,000 RPM
PSR20-1/2"-7MM-A
0.5000 in
7 mm
1.500 in (38.1 mm)
Aluminum
1.250 in (31.8 mm)
6,000 RPM
PSR20-1/2"-8MM-A
0.5000 in
8 mm
1.500 in (38.1 mm)
Aluminum
1.250 in (31.8 mm)
6,000 RPM
PSR20-1/2"-9MM-A
0.5000 in
9 mm
1.500 in (38.1 mm)
Aluminum
1.250 in (31.8 mm)
6,000 RPM
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Now Shopping by
Static Torque
52 lb-in (5.88 Nm)
Static Torque
20 lb-in (2.26 Nm)
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