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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:
MWC20-1/4\"-1/4\"-A
MWC20-1/4"-1/4"-A
As low as
$37.91
$55.60
Ruland MWC20-1/4"-1/4"-A, 1/4" x 1/4" Four Beam Coupling, Aluminum, Clamp Style, 0.787" (20.0mm) OD, 1.102" (28.0mm) Length
Download CAD File:
MWC20-1/4\"-1/4\"-SS
MWC20-1/4"-1/4"-SS
As low as
$87.75
$128.69
Ruland MWC20-1/4"-1/4"-SS, 1/4" x 1/4" Four Beam Coupling, Stainless Steel, Clamp Style, 0.787" (20.0mm) OD, 1.102" (28.0mm) Length
Download CAD File:
MWC20-1/4\"-4MM-A
MWC20-1/4"-4MM-A
As low as
$37.91
$55.60
Ruland MWC20-1/4"-4MM-A, 1/4" x 4mm Four Beam Coupling, Aluminum, Clamp Style, 0.787" (20.0mm) OD, 1.102" (28.0mm) Length
Download CAD File:
MWC20-1/4\"-4MM-SS
MWC20-1/4"-4MM-SS
As low as
$87.75
$128.69
Ruland MWC20-1/4"-4MM-SS, 1/4" x 4mm Four Beam Coupling, Aluminum, Clamp Style, 0.787" (20.0mm) OD, 1.102" (28.0mm) Length
Download CAD File:
MWC20-1/4\"-5MM-A
MWC20-1/4"-5MM-A
As low as
$37.91
$55.60
Ruland MWC20-1/4"-5MM-A, 1/4" x 5mm Four Beam Coupling, Aluminum, Clamp Style, 0.787" (20.0mm) OD, 1.102" (28.0mm) Length
Download CAD File:
MWC20-1/4\"-5MM-SS
MWC20-1/4"-5MM-SS
As low as
$87.75
$128.69
Ruland MWC20-1/4"-5MM-SS, 1/4" x 5mm Four Beam Coupling, Aluminum, Clamp Style, 0.787" (20.0mm) OD, 1.102" (28.0mm) Length
Download CAD File:
MWC20-1/4\"-6MM-A
MWC20-1/4"-6MM-A
As low as
$37.91
$55.60
Ruland MWC20-1/4"-6MM-A, 1/4" x 6mm Four Beam Coupling, Aluminum, Clamp Style, 0.787" (20.0mm) OD, 1.102" (28.0mm) Length
Download CAD File:
MWC20-1/4\"-6MM-SS
MWC20-1/4"-6MM-SS
As low as
$87.75
$128.69
Ruland MWC20-1/4"-6MM-SS, 1/4" x 6mm Four Beam Coupling, Aluminum, Clamp Style, 0.787" (20.0mm) OD, 1.102" (28.0mm) Length
Download CAD File:
MWC20-3/16\"-3/16\"-A
MWC20-3/16"-3/16"-A
As low as
$37.91
$55.60
Ruland MWC20-3/16"-3/16"-A, 3/16" x 3/16" Four Beam Coupling, Aluminum, Clamp Style, 0.787" (20.0mm) OD, 1.102" (28.0mm) Length
Download CAD File:
MWC20-3/16\"-3/16\"-SS
MWC20-3/16"-3/16"-SS
As low as
$87.75
$128.69
Ruland MWC20-3/16"-3/16"-SS, 3/16" x 3/16" Four Beam Coupling, Stainless Steel, Clamp Style, 0.787" (20.0mm) OD, 1.102" (28.0mm) Length
Download CAD File:
MWC20-3/16\"-4MM-A
MWC20-3/16"-4MM-A
As low as
$37.91
$55.60
Ruland MWC20-3/16"-4MM-A, 3/16" x 4mm Four Beam Coupling, Aluminum, Clamp Style, 0.787" (20.0mm) OD, 1.102" (28.0mm) Length
Download CAD File:
MWC20-3/16\"-4MM-SS
MWC20-3/16"-4MM-SS
As low as
$87.75
$128.69
Ruland MWC20-3/16"-4MM-SS, 3/16" x 4mm Four Beam Coupling, Stainless Steel, Clamp Style, 0.787" (20.0mm) OD, 1.102" (28.0mm) Length
Download CAD File:
MWC20-5MM-3/16\"-A
MWC20-5MM-3/16"-A
As low as
$37.91
$55.60
Ruland MWC20-5MM-3/16"-A, 5mm x 3/16" Four Beam Coupling, Aluminum, Clamp Style, 0.787" (20.0mm) OD, 1.102" (28.0mm) Length
Download CAD File:
MWC20-5MM-3/16\"-SS
MWC20-5MM-3/16"-SS
As low as
$87.75
$128.69
Ruland MWC20-5MM-3/16"-SS, 5mm x 3/16" Four Beam Coupling, Stainless Steel, Clamp Style, 0.787" (20.0mm) OD, 1.102" (28.0mm) Length
Download CAD File:
MWC20-6MM-3/16\"-A
MWC20-6MM-3/16"-A
As low as
$37.91
$55.60
Ruland MWC20-6MM-3/16"-A, 6mm x 3/16" Four Beam Coupling, Aluminum, Clamp Style, 0.787" (20.0mm) OD, 1.102" (28.0mm) Length
Download CAD File:
MWC20-6MM-3/16\"-SS
MWC20-6MM-3/16"-SS
As low as
$87.75
$128.69
Ruland MWC20-6MM-3/16"-SS, 6mm x 3/16" Four Beam Coupling, Stainless Steel, Clamp Style, 0.787" (20.0mm) OD, 1.102" (28.0mm) Length
MWS20-1/4"-6MM-SS
As low as
$78.92
$115.75
Ruland MWS20-1/4"-6MM-SS, 1/4" x 6mm Four Beam Coupling, Aluminum, Set Screw Style, 0.787" (20.0mm) OD, 0.787" (20.0mm) Length
Download CAD File:
MWS20-3/16\"-3/16\"-A
MWS20-3/16"-3/16"-A
As low as
$31.18
$45.72
Ruland MWS20-3/16"-3/16"-A, 3/16" x 3/16" Four Beam Coupling, Aluminum, Set Screw Style, 0.787" (20.0mm) OD, 0.787" (20.0mm) Length
Download CAD File:
MWS20-3/16\"-3/16\"-SS
MWS20-3/16"-3/16"-SS
As low as
$78.92
$115.75
Ruland MWS20-3/16"-3/16"-SS, 3/16" x 3/16" Four Beam Coupling, Stainless Steel, Set Screw Style, 0.787" (20.0mm) OD, 0.787" (20.0mm) Length
Download CAD File:
MWS20-3/16\"-4MM-A
MWS20-3/16"-4MM-A
As low as
$31.18
$45.72
Ruland MWS20-3/16"-4MM-A, 3/16" x 4mm Four Beam Coupling, Aluminum, Set Screw Style, 0.787" (20.0mm) OD, 0.787" (20.0mm) Length
Download CAD File:
MWS20-3/16\"-4MM-SS
MWS20-3/16"-4MM-SS
As low as
$78.92
$115.75
Ruland MWS20-3/16"-4MM-SS, 3/16" x 4mm Four Beam Coupling, Stainless Steel, Set Screw Style, 0.787" (20.0mm) OD, 0.787" (20.0mm) Length
Download CAD File:
MWS20-5MM-3/16\"-A
MWS20-5MM-3/16"-A
As low as
$31.18
$45.72
Ruland MWS20-5MM-3/16"-A, 5mm x 3/16" Four Beam Coupling, Aluminum, Set Screw Style, 0.787" (20.0mm) OD, 0.787" (20.0mm) Length
Download CAD File:
MWS20-5MM-3/16\"-SS
MWS20-5MM-3/16"-SS
As low as
$78.92
$115.75
Ruland MWS20-5MM-3/16"-SS, 5mm x 3/16" Four Beam Coupling, Stainless Steel, Set Screw Style, 0.787" (20.0mm) OD, 0.787" (20.0mm) Length
Download CAD File:
MWS20-6MM-3/16\"-A
MWS20-6MM-3/16"-A
As low as
$31.18
$45.72
Ruland MWS20-6MM-3/16"-A, 6mm x 3/16" Four Beam Coupling, Aluminum, Set Screw Style, 0.787" (20.0mm) OD, 0.787" (20.0mm) Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
MWC20-1/4"-1/4"-A
0.2500 in
0.2500 in
1.102 in (28.0 mm)
Aluminum
0.787 in (20.0 mm)
6,000 RPM
MWC20-1/4"-1/4"-SS
0.2500 in
0.2500 in
1.102 in (28.0 mm)
303 Stainless Steel
0.787 in (20.0 mm)
6,000 RPM
MWC20-1/4"-4MM-A
0.2500 in
4 mm
1.102 in (28.0 mm)
Aluminum
0.787 in (20.0 mm)
6,000 RPM
MWC20-1/4"-4MM-SS
0.2500 in
4 mm
1.102 in (28.0 mm)
303 Stainless Steel
0.787 in (20.0 mm)
6,000 RPM
MWC20-1/4"-5MM-A
0.2500 in
5 mm
1.102 in (28.0 mm)
Aluminum
0.787 in (20.0 mm)
6,000 RPM
MWC20-1/4"-5MM-SS
0.2500 in
5 mm
1.102 in (28.0 mm)
303 Stainless Steel
0.787 in (20.0 mm)
6,000 RPM
MWC20-1/4"-6MM-A
0.2500 in
6 mm
1.102 in (28.0 mm)
Aluminum
0.787 in (20.0 mm)
6,000 RPM
MWC20-1/4"-6MM-SS
0.2500 in
6 mm
1.102 in (28.0 mm)
303 Stainless Steel
0.787 in (20.0 mm)
6,000 RPM
MWC20-3/16"-3/16"-A
0.1875 in
0.1875 in
1.102 in (28.0 mm)
Aluminum
0.787 in (20.0 mm)
6,000 RPM
MWC20-3/16"-3/16"-SS
0.1875 in
0.1875 in
1.102 in (28.0 mm)
303 Stainless Steel
0.787 in (20.0 mm)
6,000 RPM
MWC20-3/16"-4MM-A
0.1875 in
4 mm
1.102 in (28.0 mm)
Aluminum
0.787 in (20.0 mm)
6,000 RPM
MWC20-3/16"-4MM-SS
0.1875 in
4 mm
1.102 in (28.0 mm)
303 Stainless Steel
0.787 in (20.0 mm)
6,000 RPM
MWC20-5MM-3/16"-A
5 mm
0.1875 in
1.102 in (28.0 mm)
Aluminum
0.787 in (20.0 mm)
6,000 RPM
MWC20-5MM-3/16"-SS
5 mm
0.1875 in
1.102 in (28.0 mm)
303 Stainless Steel
0.787 in (20.0 mm)
6,000 RPM
MWC20-6MM-3/16"-A
6 mm
0.1875 in
1.102 in (28.0 mm)
Aluminum
0.787 in (20.0 mm)
6,000 RPM
MWC20-6MM-3/16"-SS
6 mm
0.1875 in
1.102 in (28.0 mm)
303 Stainless Steel
0.787 in (20.0 mm)
6,000 RPM
MWS20-1/4"-6MM-SS
0.2500 in
6 mm
0.787 in (20.0 mm)
303 Stainless Steel
0.787 in (20.0 mm)
6,000 RPM
MWS20-3/16"-3/16"-A
0.1875 in
0.1875 in
0.787 in (20.0 mm)
Aluminum
0.787 in (20.0 mm)
6,000 RPM
MWS20-3/16"-3/16"-SS
0.1875 in
0.1875 in
0.787 in (20.0 mm)
303 Stainless Steel
0.787 in (20.0 mm)
6,000 RPM
MWS20-3/16"-4MM-A
0.1875 in
4 mm
0.787 in (20.0 mm)
Aluminum
0.787 in (20.0 mm)
6,000 RPM
MWS20-3/16"-4MM-SS
0.1875 in
4 mm
0.787 in (20.0 mm)
303 Stainless Steel
0.787 in (20.0 mm)
6,000 RPM
MWS20-5MM-3/16"-A
5 mm
0.1875 in
0.787 in (20.0 mm)
Aluminum
0.787 in (20.0 mm)
6,000 RPM
MWS20-5MM-3/16"-SS
5 mm
0.1875 in
0.787 in (20.0 mm)
303 Stainless Steel
0.787 in (20.0 mm)
6,000 RPM
MWS20-6MM-3/16"-A
6 mm
0.1875 in
0.787 in (20.0 mm)
Aluminum
0.787 in (20.0 mm)
6,000 RPM
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Outer Diameter (OD)
0.787 in (20.0 mm)
Outer Diameter (OD)
1.125 in
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