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Double Disc Couplings
Ruland double disc couplings are comprised of two anodized aluminum hubs, two sets of stainless steel disc springs, and a center spacer. This design allows the sets of disc springs to bend independent of each other to accommodate all forms of misalignment, including parallel. Center spacers are available in anodized aluminum or acetal for electrical isolation. Ruland disc couplings are zero-backlash and have a balanced design for reduced vibration at speeds up to 10,000 RPM. They are a simple assembly with few moving parts, reducing the risk of backlash and premature failure. Clamp and set screw hubs are available in bore sizes from 1/8” to 1-1/4” and 3mm to 32mm.
Features High torque
Balanced design for high RPM
Low inertia
No maintenance
High torsional stiffness
Constant velocity
Long life
Zero backlash
RoHS3 and REACH Compliant
Maximum speed: 10,000 RPM
Temperature Range: -10°F to 200°F
How to Specify Part numbers are in the following format with numbers representing sixteenths of an inch or millimeters:
Products
Download CAD File:
DCD26-20MM-1/2\"-A
DCD26-20MM-1/2"-A
As low as
$93.46
$137.07
Ruland DCD26-20MM-1/2"-A, 20mm x 1/2" Double Disc Coupling, Aluminum, Clamp Style, 1.625" (41.3mm) OD, 2.165" (55.0mm) Length
Download CAD File:
DCD26-20MM-3/4\"-A
DCD26-20MM-3/4"-A
As low as
$93.46
$137.07
Ruland DCD26-20MM-3/4"-A, 20mm x 3/4" Double Disc Coupling, Aluminum, Clamp Style, 1.625" (41.3mm) OD, 2.165" (55.0mm) Length
Download CAD File:
DCD26-20MM-3/8\"-A
DCD26-20MM-3/8"-A
As low as
$93.46
$137.07
Ruland DCD26-20MM-3/8"-A, 20mm x 3/8" Double Disc Coupling, Aluminum, Clamp Style, 1.625" (41.3mm) OD, 2.165" (55.0mm) Length
Download CAD File:
DCD26-20MM-5/8\"-A
DCD26-20MM-5/8"-A
As low as
$93.46
$137.07
Ruland DCD26-20MM-5/8"-A, 20mm x 5/8" Double Disc Coupling, Aluminum, Clamp Style, 1.625" (41.3mm) OD, 2.165" (55.0mm) Length
Download CAD File:
DCD32-20MM-1/2\"-A
DCD32-20MM-1/2"-A
As low as
$118.46
$173.75
Ruland DCD32-20MM-1/2"-A, 20mm x 1/2" Double Disc Coupling, Aluminum, Clamp Style, 2.000" (50.8mm) OD, 2.519" (64.0mm) Length
Download CAD File:
DCD32-20MM-3/4\"-A
DCD32-20MM-3/4"-A
As low as
$118.46
$173.75
Ruland DCD32-20MM-3/4"-A, 20mm x 3/4" Double Disc Coupling, Aluminum, Clamp Style, 2.000" (50.8mm) OD, 2.519" (64.0mm) Length
Download CAD File:
DCD32-20MM-5/8\"-A
DCD32-20MM-5/8"-A
As low as
$118.46
$173.75
Ruland DCD32-20MM-5/8"-A, 20mm x 5/8" Double Disc Coupling, Aluminum, Clamp Style, 2.000" (50.8mm) OD, 2.519" (64.0mm) Length
Download CAD File:
DCD36-20MM-1/2\"-A
DCD36-20MM-1/2"-A
As low as
$159.58
$234.06
Ruland DCD36-20MM-1/2"-A, 20mm x 1/2" Double Disc Coupling, Aluminum, Clamp Style, 2.250" (57.2mm) OD, 3.080" (78.2mm) Length
Download CAD File:
DCD36-20MM-3/4\"-A
DCD36-20MM-3/4"-A
As low as
$159.58
$234.06
Ruland DCD36-20MM-3/4"-A, 20mm x 3/4" Double Disc Coupling, Aluminum, Clamp Style, 2.250" (57.2mm) OD, 3.080" (78.2mm) Length
Download CAD File:
DCD36-20MM-5/8\"-A
DCD36-20MM-5/8"-A
As low as
$159.58
$234.06
Ruland DCD36-20MM-5/8"-A, 20mm x 5/8" Double Disc Coupling, Aluminum, Clamp Style, 2.250" (57.2mm) OD, 3.080" (78.2mm) Length
Download CAD File:
DCD44-20MM-3/4\"-A
DCD44-20MM-3/4"-A
As low as
$178.18
$261.33
Ruland DCD44-20MM-3/4"-A, 20mm x 3/4" Double Disc Coupling, Aluminum, Clamp Style, 2.750" (69.9mm) OD, 3.531" (89.7mm) Length
Download CAD File:
DCDK26-20MM-1/2\"-A
DCDK26-20MM-1/2"-A
As low as
$110.92
$162.68
Ruland DCDK26-20MM-1/2"-A, 20mm x 1/2" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.625" (41.3mm) OD, 2.165" (55.0mm) Length
Download CAD File:
DCDK26-20MM-3/4\"-A
DCDK26-20MM-3/4"-A
As low as
$110.92
$162.68
Ruland DCDK26-20MM-3/4"-A, 20mm x 3/4" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.625" (41.3mm) OD, 2.165" (55.0mm) Length
Download CAD File:
DCDK26-20MM-3/8\"-A
DCDK26-20MM-3/8"-A
As low as
$110.92
$162.68
Ruland DCDK26-20MM-3/8"-A, 20mm x 3/8" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.625" (41.3mm) OD, 2.165" (55.0mm) Length
Download CAD File:
DCDK26-20MM-5/8\"-A
DCDK26-20MM-5/8"-A
As low as
$110.92
$162.68
Ruland DCDK26-20MM-5/8"-A, 20mm x 5/8" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.625" (41.3mm) OD, 2.165" (55.0mm) Length
Download CAD File:
DCDK32-20MM-1/2\"-A
DCDK32-20MM-1/2"-A
As low as
$139.80
$205.04
Ruland DCDK32-20MM-1/2"-A, 20mm x 1/2" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 2.000" (50.8mm) OD, 2.519" (64.0mm) Length
Download CAD File:
DCDK32-20MM-3/4\"-A
DCDK32-20MM-3/4"-A
As low as
$139.80
$205.04
Ruland DCDK32-20MM-3/4"-A, 20mm x 3/4" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 2.000" (50.8mm) OD, 2.519" (64.0mm) Length
Download CAD File:
DCDK32-20MM-5/8\"-A
DCDK32-20MM-5/8"-A
As low as
$139.80
$205.04
Ruland DCDK32-20MM-5/8"-A, 20mm x 5/8" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 2.000" (50.8mm) OD, 2.519" (64.0mm) Length
Download CAD File:
DCDK36-20MM-1/2\"-A
DCDK36-20MM-1/2"-A
As low as
$185.23
$271.67
Ruland DCDK36-20MM-1/2"-A, 20mm x 1/2" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 2.250" (57.2mm) OD, 3.080" (78.2mm) Length
Download CAD File:
DCDK36-20MM-3/4\"-A
DCDK36-20MM-3/4"-A
As low as
$185.23
$271.67
Ruland DCDK36-20MM-3/4"-A, 20mm x 3/4" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 2.250" (57.2mm) OD, 3.080" (78.2mm) Length
Download CAD File:
DCDK36-20MM-5/8\"-A
DCDK36-20MM-5/8"-A
As low as
$185.23
$271.67
Ruland DCDK36-20MM-5/8"-A, 20mm x 5/8" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 2.250" (57.2mm) OD, 3.080" (78.2mm) Length
Download CAD File:
DCDK44-20MM-3/4\"-A
DCDK44-20MM-3/4"-A
As low as
$206.68
$303.13
Ruland DCDK44-20MM-3/4"-A, 20MM x 3/4" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 2.750" (69.9mm) OD, 3.531" (89.7 mm) Length
Download CAD File:
MDCD41-20-10-A
MDCD41-20-10-A
As low as
$93.46
$137.07
Ruland MDCD41-20-10-A, 20mm x 10mm Double Disc Coupling, Aluminum, Clamp Style, 41.3mm OD, 55.0mm Length
Download CAD File:
MDCD41-20-11-A
MDCD41-20-11-A
As low as
$93.46
$137.07
Ruland MDCD41-20-11-A, 20mm x 11mm Double Disc Coupling, Aluminum, Clamp Style, 41.3mm OD, 55.0mm Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
DCD26-20MM-1/2"-A
20 mm
0.5000 in
2.165 in (55.0 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
DCD26-20MM-3/4"-A
20 mm
0.7500 in
2.165 in (55.0 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
DCD26-20MM-3/8"-A
20 mm
0.3750 in
2.165 in (55.0 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
DCD26-20MM-5/8"-A
20 mm
0.6250 in
2.165 in (55.0 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
DCD32-20MM-1/2"-A
20 mm
0.5000 in
2.519 in (64.0 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
DCD32-20MM-3/4"-A
20 mm
0.7500 in
2.519 in (64.0 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
DCD32-20MM-5/8"-A
20 mm
0.6250 in
2.519 in (64.0 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
DCD36-20MM-1/2"-A
20 mm
0.5000 in
3.080 in (78.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
DCD36-20MM-3/4"-A
20 mm
0.7500 in
3.080 in (78.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
DCD36-20MM-5/8"-A
20 mm
0.6250 in
3.080 in (78.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
DCD44-20MM-3/4"-A
20 mm
0.7500 in
3.531 in (89.7 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
DCDK26-20MM-1/2"-A
20 mm
0.5000 in
2.165 in (55.0 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
DCDK26-20MM-3/4"-A
20 mm
0.7500 in
2.165 in (55.0 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
DCDK26-20MM-3/8"-A
20 mm
0.3750 in
2.165 in (55.0 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
DCDK26-20MM-5/8"-A
20 mm
0.6250 in
2.165 in (55.0 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
DCDK32-20MM-1/2"-A
20 mm
0.5000 in
2.519 in (64.0 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
DCDK32-20MM-3/4"-A
20 mm
0.7500 in
2.519 in (64.0 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
DCDK32-20MM-5/8"-A
20 mm
0.6250 in
2.519 in (64.0 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
DCDK36-20MM-1/2"-A
20 mm
0.5000 in
3.080 in (78.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
DCDK36-20MM-3/4"-A
20 mm
0.7500 in
3.080 in (78.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
DCDK36-20MM-5/8"-A
20 mm
0.6250 in
3.080 in (78.2 mm)
Aluminum
2.250 in (57.2 mm)
10,000 RPM
DCDK44-20MM-3/4"-A
20 mm
0.7500 in
3.531 in (89.7 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
MDCD41-20-10-A
20 mm
10 mm
55.0 mm
Aluminum
41.3 mm
10,000 RPM
MDCD41-20-11-A
20 mm
11 mm
55.0 mm
Aluminum
41.3 mm
10,000 RPM
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