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Beam Couplings for Encoders
Ruland 4-beam couplings are manufactured from a single piece of aluminum or stainless steel with multiple spiral (helical) cuts allowing for a zero-backlash encoder coupling with higher accuracy and better overall misalignment capabilities than traditional single beam couplings. They are designed with extra flexibility to provide reduced bearing loads, which is critical in encoders which have small sensitive bearings. Ruland 4-beam couplings have a balanced design for reduced vibration at speeds up to 6,000 RPM. Ruland manufactures two series of 4-beam couplings, P and MW, giving designers a variety of performance and dimensional characteristics to choose from. Ruland manufactures 4-beam couplings in our Marlborough, Massachusetts factory with bore sizes ranging from 3/32” to 1/2” or 3mm to 12mm.
Products
Download CAD File:
PCR10-4MM-1/8\"-SS
PCR10-4MM-1/8"-SS
As low as
$89.78
$131.68
Ruland PCR10-4MM-1/8"-SS, 4mm x 1/8" Four Beam Coupling, Stainless Steel, Clamp Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PCR10-4MM-5/32\"-SS
PCR10-4MM-5/32"-SS
As low as
$89.78
$131.68
Ruland PCR10-4MM-5/32"-SS, 4mm x 5/32" Four Beam Coupling, Stainless Steel, Clamp Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PCR10-5MM-1/8\"-SS
PCR10-5MM-1/8"-SS
As low as
$89.78
$131.68
Ruland PCR10-5MM-1/8"-SS, 5mm x 1/8" Four Beam Coupling, Stainless Steel, Clamp Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PCR10-5MM-3/16\"-SS
PCR10-5MM-3/16"-SS
As low as
$89.78
$131.68
Ruland PCR10-5MM-3/16"-SS, 5mm x 3/16" Four Beam Coupling, Stainless Steel, Clamp Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PCR10-5MM-5/32\"-SS
PCR10-5MM-5/32"-SS
As low as
$89.78
$131.68
Ruland PCR10-5MM-5/32"-SS, 5mm x 5/32" Four Beam Coupling, Stainless Steel, Clamp Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PCR14-7MM-1/4\"-A
PCR14-7MM-1/4"-A
As low as
$37.53
$55.04
Ruland PCR14-7MM-1/4"-A, 7mm x 1/4" Four Beam Coupling, Aluminum, Clamp Style, 0.875" (22.2mm) OD, 1.063" (27.0mm) Length
Download CAD File:
PCR14-7MM-3/16\"-A
PCR14-7MM-3/16"-A
As low as
$37.53
$55.04
Ruland PCR14-7MM-3/16"-A, 7mm x 3/16" Four Beam Coupling, Aluminum, Clamp Style, 0.875" (22.2mm) OD, 1.063" (27.0mm) Length
Download CAD File:
PCR14-8MM-1/4\"-A
PCR14-8MM-1/4"-A
As low as
$37.53
$55.04
Ruland PCR14-8MM-1/4"-A, 8mm x 1/4" Four Beam Coupling, Aluminum, Clamp Style, 0.875" (22.2mm) OD, 1.063" (27.0mm) Length
Download CAD File:
PCR14-8MM-3/16\"-A
PCR14-8MM-3/16"-A
As low as
$37.53
$55.04
Ruland PCR14-8MM-3/16"-A, 8mm x 3/16" Four Beam Coupling, Aluminum, Clamp Style, 0.875" (22.2mm) OD, 1.063" (27.0mm) Length
Download CAD File:
PCR14-8MM-5/16\"-A
PCR14-8MM-5/16"-A
As low as
$37.53
$55.04
Ruland PCR14-8MM-5/16"-A, 8mm x 5/16" Four Beam Coupling, Aluminum, Clamp Style, 0.875" (22.2mm) OD, 1.063" (27.0mm) Length
Download CAD File:
PCR8-1.5-1.5-SS
PCR8-1.5-1.5-SS
As low as
$88.31
$129.52
Ruland PCR8-1.5-1.5-SS, 3/32" x 3/32" Four Beam Coupling, Stainless Steel, Clamp Style, 0.500" OD, 0.750" Length
Download CAD File:
PCR8-2-1.5-SS
PCR8-2-1.5-SS
As low as
$88.31
$129.52
Ruland PCR8-2-1.5-SS, 1/8" x 3/32" Four Beam Coupling, Stainless Steel, Clamp Style, 0.500" OD, 0.750" Length
Download CAD File:
PCR8-2-2-SS
PCR8-2-2-SS
As low as
$88.31
$129.52
Ruland PCR8-2-2-SS, 1/8" x 1/8" Four Beam Coupling, Stainless Steel, Clamp Style, 0.500" OD, 0.750" Length
Download CAD File:
PSR10-4MM-1/8\"-SS
PSR10-4MM-1/8"-SS
As low as
$80.07
$117.44
Ruland PSR10-4MM-1/8"-SS, 4mm x 1/8" Four Beam Coupling, Stainless Steel, Set Screw Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PSR10-4MM-5/32\"-SS
PSR10-4MM-5/32"-SS
As low as
$80.07
$117.44
Ruland PSR10-4MM-5/32"-SS, 4mm x 5/32" Four Beam Coupling, Stainless Steel, Set Screw Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PSR10-5MM-1/8\"-SS
PSR10-5MM-1/8"-SS
As low as
$80.07
$117.44
Ruland PSR10-5MM-1/8"-SS, 5mm x 1/8" Four Beam Coupling, Stainless Steel, Set Screw Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PSR10-5MM-3/16\"-SS
PSR10-5MM-3/16"-SS
As low as
$80.07
$117.44
Ruland PSR10-5MM-3/16"-SS, 5mm x 3/16" Four Beam Coupling, Stainless Steel, Set Screw Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PSR10-5MM-5/32\"-SS
PSR10-5MM-5/32"-SS
As low as
$80.07
$117.44
Ruland PSR10-5MM-5/32"-SS, 5mm x 5/32" Four Beam Coupling, Stainless Steel, Set Screw Style, 0.625" (15.9mm) OD, 0.800" (20.3mm) Length
Download CAD File:
PSR14-7MM-1/4\"-A
PSR14-7MM-1/4"-A
As low as
$33.30
$48.83
Ruland PSR14-7MM-1/4"-A, 7mm x 1/4" Four Beam Coupling, Aluminum, Set Screw Style, 0.875" (22.2mm) OD, 1.063" (27.0mm) Length
Download CAD File:
PSR14-7MM-3/16\"-A
PSR14-7MM-3/16"-A
As low as
$33.30
$48.83
Ruland PSR14-7MM-3/16"-A, 7mm x 3/16" Four Beam Coupling, Aluminum, Set Screw Style, 0.875" (22.2mm) OD, 1.063" (27.0mm) Length
Download CAD File:
PSR14-8MM-1/4\"-A
PSR14-8MM-1/4"-A
As low as
$33.30
$48.83
Ruland PSR14-8MM-1/4"-A, 8mm x 1/4" Four Beam Coupling, Aluminum, Set Screw Style, 0.875" (22.2mm) OD, 1.063" (27.0mm) Length
Download CAD File:
PSR14-8MM-3/16\"-A
PSR14-8MM-3/16"-A
As low as
$33.30
$48.83
Ruland PSR14-8MM-3/16"-A, 8mm x 3/16" Four Beam Coupling, Aluminum, Set Screw Style, 0.875" (22.2mm) OD, 1.063" (27.0mm) Length
Download CAD File:
PSR14-8MM-5/16\"-A
PSR14-8MM-5/16"-A
As low as
$33.30
$48.83
Ruland PSR14-8MM-5/16"-A, 8mm x 5/16" Four Beam Coupling, Aluminum, Set Screw Style, 0.875" (22.2mm) OD, 1.063" (27.0mm) Length
Download CAD File:
PSR8-1.5-1.5-SS
PSR8-1.5-1.5-SS
As low as
$80.84
$118.56
Ruland PSR8-1.5-1.5-SS, 3/32" x 3/32" Four Beam Coupling, Stainless Steel, Set Screw Style, 0.500" OD, 0.750" Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
PCR10-4MM-1/8"-SS
4 mm
0.1250 in
0.800 in (20.3 mm)
303 Stainless Steel
0.625 in (15.9 mm)
6,000 RPM
PCR10-4MM-5/32"-SS
4 mm
0.1563 in
0.800 in (20.3 mm)
303 Stainless Steel
0.625 in (15.9 mm)
6,000 RPM
PCR10-5MM-1/8"-SS
5 mm
0.1250 in
0.800 in (20.3 mm)
303 Stainless Steel
0.625 in (15.9 mm)
6,000 RPM
PCR10-5MM-3/16"-SS
5 mm
0.1875 in
0.800 in (20.3 mm)
303 Stainless Steel
0.625 in (15.9 mm)
6,000 RPM
PCR10-5MM-5/32"-SS
5 mm
0.1563 in
0.800 in (20.3 mm)
303 Stainless Steel
0.625 in (15.9 mm)
6,000 RPM
PCR14-7MM-1/4"-A
7 mm
0.2500 in
1.063 in (27.0 mm)
Aluminum
0.875 in (22.2 mm)
6,000 RPM
PCR14-7MM-3/16"-A
7 mm
0.1875 in
1.063 in (27.0 mm)
Aluminum
0.875 in (22.2 mm)
6,000 RPM
PCR14-8MM-1/4"-A
8 mm
0.2500 in
1.063 in (27.0 mm)
Aluminum
0.875 in (22.2 mm)
6,000 RPM
PCR14-8MM-3/16"-A
8 mm
0.1875 in
1.063 in (27.0 mm)
Aluminum
0.875 in (22.2 mm)
6,000 RPM
PCR14-8MM-5/16"-A
8 mm
0.3125 in
1.063 in (27.0 mm)
Aluminum
0.875 in (22.2 mm)
6,000 RPM
PCR8-1.5-1.5-SS
0.0938 in
0.0938 in
0.750 in
303 Stainless Steel
0.500 in
6,000 RPM
PCR8-2-1.5-SS
0.1250 in
0.0938 in
0.750 in
303 Stainless Steel
0.500 in
6,000 RPM
PCR8-2-2-SS
0.1250 in
0.1250 in
0.750 in
303 Stainless Steel
0.500 in
6,000 RPM
PSR10-4MM-1/8"-SS
4 mm
0.1250 in
0.800 in (20.3 mm)
303 Stainless Steel
0.625 in (15.9 mm)
6,000 RPM
PSR10-4MM-5/32"-SS
4 mm
0.1563 in
0.800 in (20.3 mm)
303 Stainless Steel
0.625 in (15.9 mm)
6,000 RPM
PSR10-5MM-1/8"-SS
5 mm
0.1250 in
0.800 in (20.3 mm)
303 Stainless Steel
0.625 in (15.9 mm)
6,000 RPM
PSR10-5MM-3/16"-SS
5 mm
0.1875 in
0.800 in (20.3 mm)
303 Stainless Steel
0.625 in (15.9 mm)
6,000 RPM
PSR10-5MM-5/32"-SS
5 mm
0.1563 in
0.800 in (20.3 mm)
303 Stainless Steel
0.625 in (15.9 mm)
6,000 RPM
PSR14-7MM-1/4"-A
7 mm
0.2500 in
1.063 in (27.0 mm)
Aluminum
0.875 in (22.2 mm)
6,000 RPM
PSR14-7MM-3/16"-A
7 mm
0.1875 in
1.063 in (27.0 mm)
Aluminum
0.875 in (22.2 mm)
6,000 RPM
PSR14-8MM-1/4"-A
8 mm
0.2500 in
1.063 in (27.0 mm)
Aluminum
0.875 in (22.2 mm)
6,000 RPM
PSR14-8MM-3/16"-A
8 mm
0.1875 in
1.063 in (27.0 mm)
Aluminum
0.875 in (22.2 mm)
6,000 RPM
PSR14-8MM-5/16"-A
8 mm
0.3125 in
1.063 in (27.0 mm)
Aluminum
0.875 in (22.2 mm)
6,000 RPM
PSR8-1.5-1.5-SS
0.0938 in
0.0938 in
0.750 in
303 Stainless Steel
0.500 in
6,000 RPM
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Static Torque
11 lb-in
Static Torque
16.0 lb-in (1.81 Nm)
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