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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:
MWC30-1/2\"-12MM-A
MWC30-1/2"-12MM-A
As low as
$59.65
$87.49
Ruland MWC30-1/2"-12MM-A, 1/2" x 12mm Four Beam Coupling, Aluminum, Clamp Style, 1.181" (30.0mm) OD, 1.496" (38.0mm) Length
Download CAD File:
MWC30-1/2\"-12MM-SS
MWC30-1/2"-12MM-SS
As low as
$128.56
$188.55
Ruland MWC30-1/2"-12MM-SS, 1/2" x 12mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.181" (30.0mm) OD, 1.496" (38.0mm) Length
Download CAD File:
MWC30-12-12-A
MWC30-12-12-A
As low as
$59.65
$87.49
Ruland MWC30-12-12-A, 12mm x 12mm Four Beam Coupling, Aluminum, Clamp Style, 30.0mm OD, 38.0mm Length
Download CAD File:
MWC30-12-12-SS
MWC30-12-12-SS
As low as
$128.56
$188.55
Ruland MWC30-12-12-SS, 12mm x 12mm Four Beam Coupling, Stainless Steel, Clamp Style, 30.0mm OD, 38.0mm Length
Download CAD File:
MWS30-1/2\"-12MM-A
MWS30-1/2"-12MM-A
As low as
$51.54
$75.60
Ruland MWS30-1/2"-12MM-A, 1/2" x 12mm Four Beam Coupling, Aluminum, Set Screw Style, 1.181" (30.0mm) OD, 1.181" (30.0mm) Length
Download CAD File:
MWS30-1/2\"-12MM-SS
MWS30-1/2"-12MM-SS
As low as
$118.90
$174.39
Ruland MWS30-1/2"-12MM-SS, 1/2" x 12mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.181" (30.0mm) OD, 1.181" (30.0mm) Length
Download CAD File:
MWS30-12-12-A
MWS30-12-12-A
As low as
$51.54
$75.60
Ruland MWS30-12-12-A, 12mm x 12mm Four Beam Coupling, Aluminum, Set Screw Style, 30.0mm OD, 30.0mm Length
Download CAD File:
MWS30-12-12-SS
MWS30-12-12-SS
As low as
$118.90
$174.39
Ruland MWS30-12-12-SS, 12mm x 12mm Four Beam Coupling, Stainless Steel, Set Screw Style, 30.0mm OD, 30.0mm Length
Download CAD File:
PCMR29-12-12-A
PCMR29-12-12-A
As low as
$47.49
$69.65
Ruland PCMR29-12-12-A, 12mm x 12mm Four Beam Coupling, Aluminum, Clamp Style, 28.6mm OD, 38.1mm Length
Download CAD File:
PCMR29-12-12-SS
PCMR29-12-12-SS
As low as
$119.59
$175.40
Ruland PCMR29-12-12-SS, 12mm x 12mm Four Beam Coupling, Stainless Steel, Clamp Style, 28.6mm OD, 38.1mm Length
Download CAD File:
PCMR32-12-12-A
PCMR32-12-12-A
As low as
$58.15
$85.29
Ruland PCMR32-12-12-A, 12mm x 12mm Four Beam Coupling, Aluminum, Clamp Style, 31.8mm OD, 38.1mm Length
Download CAD File:
PCMR32-12-12-SS
PCMR32-12-12-SS
As low as
$146.33
$214.61
Ruland PCMR32-12-12-SS, 12mm x 12mm Four Beam Coupling, Stainless Steel, Clamp Style, 31.8mm OD, 38.1mm Length
Download CAD File:
PCR18-1/2\"-12MM-A
PCR18-1/2"-12MM-A
As low as
$47.49
$69.65
Ruland PCR18-1/2"-12MM-A, 1/2" x 12mm Four Beam Coupling, Aluminum, Clamp Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PCR18-1/2\"-12MM-SS
PCR18-1/2"-12MM-SS
As low as
$119.59
$175.40
Ruland PCR18-1/2"-12MM-SS, 1/2" x 12mm Four Beam Coupling, Stainless Steel, Clamp Style, 1.125" (28.6mm) 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\"-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:
PSMR29-12-12-A
PSMR29-12-12-A
As low as
$41.35
$60.64
Ruland PSMR29-12-12-A, 12mm x 12mm Four Beam Coupling, Aluminum, Set Screw Style, 28.6mm OD, 38.1mm Length
Download CAD File:
PSMR29-12-12-SS
PSMR29-12-12-SS
As low as
$110.57
$162.16
Ruland PSMR29-12-12-SS, 12mm x 12mm Four Beam Coupling, Stainless Steel, Set Screw Style, 28.6mm OD, 38.1mm Length
Download CAD File:
PSMR32-12-12-A
PSMR32-12-12-A
As low as
$50.14
$73.54
Ruland PSMR32-12-12-A, 12mm x 12mm Four Beam Coupling, Aluminum, Set Screw Style, 31.8mm OD, 38.1mm Length
Download CAD File:
PSMR32-12-12-SS
PSMR32-12-12-SS
As low as
$135.37
$198.54
Ruland PSMR32-12-12-SS, 12mm x 12mm Four Beam Coupling, Stainless Steel, Set Screw Style, 31.8mm OD, 38.1mm Length
Download CAD File:
PSR18-1/2\"-12MM-A
PSR18-1/2"-12MM-A
As low as
$41.35
$60.64
Ruland PSR18-1/2"-12MM-A, 1/2" x 12mm Four Beam Coupling, Aluminum, Set Screw Style, 1.125" (28.6mm) OD, 1.500" (38.1mm) Length
Download CAD File:
PSR18-1/2\"-12MM-SS
PSR18-1/2"-12MM-SS
As low as
$110.57
$162.16
Ruland PSR18-1/2"-12MM-SS, 1/2" x 12mm Four Beam Coupling, Stainless Steel, Set Screw Style, 1.125" (28.6mm) 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\"-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
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
MWC30-1/2"-12MM-A
0.5000 in
12 mm
1.496 in (38.0 mm)
Aluminum
1.181 in (30.0 mm)
6,000 RPM
MWC30-1/2"-12MM-SS
0.5000 in
12 mm
1.496 in (38.0 mm)
303 Stainless Steel
1.181 in (30.0 mm)
6,000 RPM
MWC30-12-12-A
12 mm
12 mm
38.0 mm
Aluminum
30.0 mm
6,000 RPM
MWC30-12-12-SS
12 mm
12 mm
38.0 mm
303 Stainless Steel
30.0 mm
6,000 RPM
MWS30-1/2"-12MM-A
0.5000 in
12 mm
1.181 in (30.0 mm)
Aluminum
1.181 in (30.0 mm)
6,000 RPM
MWS30-1/2"-12MM-SS
0.5000 in
12 mm
1.181 in (30.0 mm)
303 Stainless Steel
1.181 in (30.0 mm)
6,000 RPM
MWS30-12-12-A
12 mm
12 mm
30.0 mm
Aluminum
30.0 mm
6,000 RPM
MWS30-12-12-SS
12 mm
12 mm
30.0 mm
303 Stainless Steel
30.0 mm
6,000 RPM
PCMR29-12-12-A
12 mm
12 mm
38.1 mm
Aluminum
28.6 mm
6,000 RPM
PCMR29-12-12-SS
12 mm
12 mm
38.1 mm
303 Stainless Steel
28.6 mm
6,000 RPM
PCMR32-12-12-A
12 mm
12 mm
38.1 mm
Aluminum
31.8 mm
6,000 RPM
PCMR32-12-12-SS
12 mm
12 mm
38.1 mm
303 Stainless Steel
31.8 mm
6,000 RPM
PCR18-1/2"-12MM-A
0.5000 in
12 mm
1.500 in (38.1 mm)
Aluminum
1.125 in (28.6 mm)
6,000 RPM
PCR18-1/2"-12MM-SS
0.5000 in
12 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.125 in (28.6 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"-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
PSMR29-12-12-A
12 mm
12 mm
38.1 mm
Aluminum
28.6 mm
6,000 RPM
PSMR29-12-12-SS
12 mm
12 mm
38.1 mm
303 Stainless Steel
28.6 mm
6,000 RPM
PSMR32-12-12-A
12 mm
12 mm
38.1 mm
Aluminum
31.8 mm
6,000 RPM
PSMR32-12-12-SS
12 mm
12 mm
38.1 mm
303 Stainless Steel
31.8 mm
6,000 RPM
PSR18-1/2"-12MM-A
0.5000 in
12 mm
1.500 in (38.1 mm)
Aluminum
1.125 in (28.6 mm)
6,000 RPM
PSR18-1/2"-12MM-SS
0.5000 in
12 mm
1.500 in (38.1 mm)
303 Stainless Steel
1.125 in (28.6 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"-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
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