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P-Series Four Beam Couplings
P-series beam couplings are designed specifically for precision applications, such as encoders and tachometers that use delicate components. The small bearings on these components make low radial forces essential to longevity and continued high performance. They provide extra flexibility to yield reduced bearing loads. These flexible couplings are shorter than the F-series six beam couplings and conform to industry standard lengths, fitting into confined spaces and allowing for easy retrofits in existing equipment. At the same time, the helical cut pattern continues to provide excellent torque capabilities and low wind-up. P-series beam couplings are manufactured from a single piece of 7075 aluminum for lightweight and low inertia or 303 stainless steel for increased torque capabilities.
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
RoHS3 and REACH Compliant
Maximum speed: 6,000 RPM
How to Specify Part numbers are in the following format with numbers representing sixteenths of an inch:
Products
Download CAD File:
PCR12-1/4\"-3MM-A
PCR12-1/4"-3MM-A
As low as
$33.27
$48.79
Ruland PCR12-1/4"-3MM-A, 1/4" x 3mm Four Beam Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 0.900" (22.9mm) Length
Download CAD File:
PCR12-1/4\"-4MM-A
PCR12-1/4"-4MM-A
As low as
$33.27
$48.79
Ruland PCR12-1/4"-4MM-A, 1/4" x 4mm Four Beam Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 0.900" (22.9mm) Length
Download CAD File:
PCR12-1/4\"-5MM-A
PCR12-1/4"-5MM-A
As low as
$33.27
$48.79
Ruland PCR12-1/4"-5MM-A, 1/4" x 5mm Four Beam Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 0.900" (22.9mm) Length
Download CAD File:
PCR12-1/4\"-6MM-A
PCR12-1/4"-6MM-A
As low as
$33.27
$48.79
Ruland PCR12-1/4"-6MM-A, 1/4" x 6mm Four Beam Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 0.900" (22.9mm) Length
Download CAD File:
PCR20-1/2\"-10MM-SS
PCR20-1/2"-10MM-SS
As low as
$146.33
$214.61
Ruland PCR20-1/2"-10MM-SS, 1/2" x 10mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR20-1/2\"-11MM-SS
PCR20-1/2"-11MM-SS
As low as
$146.33
$214.61
Ruland PCR20-1/2"-11MM-SS, 1/2" x 11mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR20-1/2\"-12MM-SS
PCR20-1/2"-12MM-SS
As low as
$146.33
$214.61
Ruland PCR20-1/2"-12MM-SS, 1/2" x 12mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR20-1/2\"-6MM-SS
PCR20-1/2"-6MM-SS
As low as
$146.33
$214.61
Ruland PCR20-1/2"-6MM-SS, 1/2" x 6mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR20-1/2\"-7MM-SS
PCR20-1/2"-7MM-SS
As low as
$146.33
$214.61
Ruland PCR20-1/2"-7MM-SS, 1/2" x 7mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR20-1/2\"-8MM-SS
PCR20-1/2"-8MM-SS
As low as
$146.33
$214.61
Ruland PCR20-1/2"-8MM-SS, 1/2" x 8mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR20-1/2\"-9MM-SS
PCR20-1/2"-9MM-SS
As low as
$146.33
$214.61
Ruland PCR20-1/2"-9MM-SS, 1/2" x 9mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR12-1/4\"-3MM-A
PSR12-1/4"-3MM-A
As low as
$28.58
$41.91
Ruland PSR12-1/4"-3MM-A, 1/4" x 3mm Four Beam Coupling, Aluminum, Set Screw Style, 0.750" (19.1mm) OD, 0.900" (22.9mm) Length
Download CAD File:
PSR12-1/4\"-4MM-A
PSR12-1/4"-4MM-A
As low as
$28.58
$41.91
Ruland PSR12-1/4"-4MM-A, 1/4" x 4mm Four Beam Coupling, Aluminum, Set Screw Style, 0.750" (19.1mm) OD, 0.900" (22.9mm) Length
Download CAD File:
PSR12-1/4\"-5MM-A
PSR12-1/4"-5MM-A
As low as
$28.58
$41.91
Ruland PSR12-1/4"-5MM-A, 1/4" x 5mm Four Beam Coupling, Aluminum, Set Screw Style, 0.750" (19.1mm) OD, 0.900" (22.9mm) Length
Download CAD File:
PSR12-1/4\"-6MM-A
PSR12-1/4"-6MM-A
As low as
$28.58
$41.91
Ruland PSR12-1/4"-6MM-A, 1/4" x 6mm Four Beam Coupling, Aluminum, Set Screw Style, 0.750" (19.1mm) OD, 0.900" (22.9mm) Length
Download CAD File:
PSR20-1/2\"-10MM-SS
PSR20-1/2"-10MM-SS
As low as
$135.37
$198.54
Ruland PSR20-1/2"-10MM-SS, 1/2" x 10mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR20-1/2\"-11MM-SS
PSR20-1/2"-11MM-SS
As low as
$135.37
$198.54
Ruland PSR20-1/2"-11MM-SS, 1/2" x 11mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR20-1/2\"-12MM-SS
PSR20-1/2"-12MM-SS
As low as
$135.37
$198.54
Ruland PSR20-1/2"-12MM-SS, 1/2" x 12mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR20-1/2\"-6MM-SS
PSR20-1/2"-6MM-SS
As low as
$135.37
$198.54
Ruland PSR20-1/2"-6MM-SS, 1/2" x 6mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR20-1/2\"-7MM-SS
PSR20-1/2"-7MM-SS
As low as
$135.37
$198.54
Ruland PSR20-1/2"-7MM-SS, 1/2" x 7mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR20-1/2\"-8MM-SS
PSR20-1/2"-8MM-SS
As low as
$135.37
$198.54
Ruland PSR20-1/2"-8MM-SS, 1/2" x 8mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.250" (31.8mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR20-1/2\"-9MM-SS
PSR20-1/2"-9MM-SS
As low as
$135.37
$198.54
Ruland PSR20-1/2"-9MM-SS, 1/2" x 9mm Four Beam Coupling, Stainless Steel, 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
PCR12-1/4"-3MM-A
0.2500 in
3 mm
0.900 in (22.9 mm)
Aluminum
0.750 in (19.1 mm)
6,000 RPM
PCR12-1/4"-4MM-A
0.2500 in
4 mm
0.900 in (22.9 mm)
Aluminum
0.750 in (19.1 mm)
6,000 RPM
PCR12-1/4"-5MM-A
0.2500 in
5 mm
0.900 in (22.9 mm)
Aluminum
0.750 in (19.1 mm)
6,000 RPM
PCR12-1/4"-6MM-A
0.2500 in
6 mm
0.900 in (22.9 mm)
Aluminum
0.750 in (19.1 mm)
6,000 RPM
PCR20-1/2"-10MM-SS
0.5000 in
10 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.250 in (31.8 mm)
6,000 RPM
PCR20-1/2"-11MM-SS
0.5000 in
11 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.250 in (31.8 mm)
6,000 RPM
PCR20-1/2"-12MM-SS
0.5000 in
12 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.250 in (31.8 mm)
6,000 RPM
PCR20-1/2"-6MM-SS
0.5000 in
6 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.250 in (31.8 mm)
6,000 RPM
PCR20-1/2"-7MM-SS
0.5000 in
7 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.250 in (31.8 mm)
6,000 RPM
PCR20-1/2"-8MM-SS
0.5000 in
8 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.250 in (31.8 mm)
6,000 RPM
PCR20-1/2"-9MM-SS
0.5000 in
9 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.250 in (31.8 mm)
6,000 RPM
PSR12-1/4"-3MM-A
0.2500 in
3 mm
0.900 in (22.9 mm)
Aluminum
0.750 in (19.1 mm)
6,000 RPM
PSR12-1/4"-4MM-A
0.2500 in
4 mm
0.900 in (22.9 mm)
Aluminum
0.750 in (19.1 mm)
6,000 RPM
PSR12-1/4"-5MM-A
0.2500 in
5 mm
0.900 in (22.9 mm)
Aluminum
0.750 in (19.1 mm)
6,000 RPM
PSR12-1/4"-6MM-A
0.2500 in
6 mm
0.900 in (22.9 mm)
Aluminum
0.750 in (19.1 mm)
6,000 RPM
PSR20-1/2"-10MM-SS
0.5000 in
10 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.250 in (31.8 mm)
6,000 RPM
PSR20-1/2"-11MM-SS
0.5000 in
11 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.250 in (31.8 mm)
6,000 RPM
PSR20-1/2"-12MM-SS
0.5000 in
12 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.250 in (31.8 mm)
6,000 RPM
PSR20-1/2"-6MM-SS
0.5000 in
6 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.250 in (31.8 mm)
6,000 RPM
PSR20-1/2"-7MM-SS
0.5000 in
7 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.250 in (31.8 mm)
6,000 RPM
PSR20-1/2"-8MM-SS
0.5000 in
8 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.250 in (31.8 mm)
6,000 RPM
PSR20-1/2"-9MM-SS
0.5000 in
9 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.250 in (31.8 mm)
6,000 RPM
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Static Torque
14 lb-in (1.58 Nm)
Static Torque
70 lb-in (7.91 Nm)
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