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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:
PCR12-1/4\"-3MM-SS
PCR12-1/4"-3MM-SS
As low as
$83.24
$122.08
Ruland PCR12-1/4"-3MM-SS, 1/4" x 3mm Four Beam Coupling, Stainless Steel, Clamp Style, 0.750" (19.1mm) OD, 0.900" (22.9mm) Length
Download CAD File:
PCR12-1/4\"-4MM-SS
PCR12-1/4"-4MM-SS
As low as
$83.24
$122.08
Ruland PCR12-1/4"-4MM-SS, 1/4" x 4mm Four Beam Coupling, Stainless Steel, Clamp Style, 0.750" (19.1mm) OD, 0.900" (22.9mm) Length
Download CAD File:
PCR12-1/4\"-5MM-SS
PCR12-1/4"-5MM-SS
As low as
$83.24
$122.08
Ruland PCR12-1/4"-5MM-SS, 1/4" x 5mm Four Beam Coupling, Stainless Steel, Clamp Style, 0.750" (19.1mm) OD, 0.900" (22.9mm) Length
Download CAD File:
PCR12-1/4\"-6MM-SS
PCR12-1/4"-6MM-SS
As low as
$83.24
$122.08
Ruland PCR12-1/4"-6MM-SS, 1/4" x 6mm Four Beam Coupling, Stainless Steel, Clamp Style, 0.750" (19.1mm) OD, 0.900" (22.9mm) Length
Download CAD File:
PCR18-10MM-1/4\"-A
PCR18-10MM-1/4"-A
As low as
$47.49
$69.65
Ruland PCR18-10MM-1/4"-A, 10mm x 1/4" Four Beam Coupling, Aluminum, Clamp Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR18-10MM-3/8\"-A
PCR18-10MM-3/8"-A
As low as
$47.49
$69.65
Ruland PCR18-10MM-3/8"-A, 10mm x 3/8" Four Beam Coupling, Aluminum, Clamp Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR18-10MM-5/16\"-A
PCR18-10MM-5/16"-A
As low as
$47.49
$69.65
Ruland PCR18-10MM-5/16"-A, 10mm x 5/16" Four Beam Coupling, Aluminum, Clamp Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR12-1/4\"-3MM-SS
PSR12-1/4"-3MM-SS
As low as
$72.98
$107.04
Ruland PSR12-1/4"-3MM-SS, 1/4" x 3mm Four Beam Coupling, Stainless Steel, Set Screw Style, 0.750" (19.1mm) OD, 0.900" (22.9mm) Length
Download CAD File:
PSR12-1/4\"-4MM-SS
PSR12-1/4"-4MM-SS
As low as
$72.98
$107.04
Ruland PSR12-1/4"-4MM-SS, 1/4" x 4mm Four Beam Coupling, Stainless Steel, Set Screw Style, 0.750" (19.1mm) OD, 0.900" (22.9mm) Length
Download CAD File:
PSR12-1/4\"-5MM-SS
PSR12-1/4"-5MM-SS
As low as
$72.98
$107.04
Ruland PSR12-1/4"-5MM-SS, 1/4" x 5mm Four Beam Coupling, Stainless Steel, Set Screw Style, 0.750" (19.1mm) OD, 0.900" (22.9mm) Length
Download CAD File:
PSR12-1/4\"-6MM-SS
PSR12-1/4"-6MM-SS
As low as
$72.98
$107.04
Ruland PSR12-1/4"-6MM-SS, 1/4" x 6mm Four Beam Coupling, Stainless Steel, Set Screw Style, 0.750" (19.1mm) OD, 0.900" (22.9mm) Length
Download CAD File:
PSR18-10MM-1/4\"-A
PSR18-10MM-1/4"-A
As low as
$41.35
$60.64
Ruland PSR18-10MM-1/4"-A, 10mm x 1/4" Four Beam Coupling, Aluminum, Set Screw Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR18-10MM-3/8\"-A
PSR18-10MM-3/8"-A
As low as
$41.35
$60.64
Ruland PSR18-10MM-3/8"-A, 10mm x 3/8" Four Beam Coupling, Aluminum, Set Screw Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR18-10MM-5/16\"-A
PSR18-10MM-5/16"-A
As low as
$41.35
$60.64
Ruland PSR18-10MM-5/16"-A, 10mm x 5/16" Four Beam Coupling, Aluminum, 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
PCR12-1/4"-3MM-SS
0.2500 in
3 mm
0.900 in (22.9 mm)
303 Stainless Steel
0.750 in (19.1 mm)
6,000 RPM
PCR12-1/4"-4MM-SS
0.2500 in
4 mm
0.900 in (22.9 mm)
303 Stainless Steel
0.750 in (19.1 mm)
6,000 RPM
PCR12-1/4"-5MM-SS
0.2500 in
5 mm
0.900 in (22.9 mm)
303 Stainless Steel
0.750 in (19.1 mm)
6,000 RPM
PCR12-1/4"-6MM-SS
0.2500 in
6 mm
0.900 in (22.9 mm)
303 Stainless Steel
0.750 in (19.1 mm)
6,000 RPM
PCR18-10MM-1/4"-A
10 mm
0.2500 in
1.500 in (38.1 mm)
Aluminum
1.125 in (28.6 mm)
6,000 RPM
PCR18-10MM-3/8"-A
10 mm
0.3750 in
1.500 in (38.1 mm)
Aluminum
1.125 in (28.6 mm)
6,000 RPM
PCR18-10MM-5/16"-A
10 mm
0.3125 in
1.500 in (38.1 mm)
Aluminum
1.125 in (28.6 mm)
6,000 RPM
PSR12-1/4"-3MM-SS
0.2500 in
3 mm
0.900 in (22.9 mm)
303 Stainless Steel
0.750 in (19.1 mm)
6,000 RPM
PSR12-1/4"-4MM-SS
0.2500 in
4 mm
0.900 in (22.9 mm)
303 Stainless Steel
0.750 in (19.1 mm)
6,000 RPM
PSR12-1/4"-5MM-SS
0.2500 in
5 mm
0.900 in (22.9 mm)
303 Stainless Steel
0.750 in (19.1 mm)
6,000 RPM
PSR12-1/4"-6MM-SS
0.2500 in
6 mm
0.900 in (22.9 mm)
303 Stainless Steel
0.750 in (19.1 mm)
6,000 RPM
PSR18-10MM-1/4"-A
10 mm
0.2500 in
1.500 in (38.1 mm)
Aluminum
1.125 in (28.6 mm)
6,000 RPM
PSR18-10MM-3/8"-A
10 mm
0.3750 in
1.500 in (38.1 mm)
Aluminum
1.125 in (28.6 mm)
6,000 RPM
PSR18-10MM-5/16"-A
10 mm
0.3125 in
1.500 in (38.1 mm)
Aluminum
1.125 in (28.6 mm)
6,000 RPM
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Now Shopping by
Static Torque
40.0 lb-in (4.52 Nm)
Static Torque
19 lb-in (2.15 Nm)
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