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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:
DCD21-10-10-A
DCD21-10-10-A
As low as
$82.57
$121.10
Ruland DCD21-10-10-A, 5/8" x 5/8" Double Disc Coupling, Aluminum, Clamp Style, 1.313" OD, 1.770" Length
Download CAD File:
DCD21-10-5-A
DCD21-10-5-A
As low as
$82.57
$121.10
Ruland DCD21-10-5-A, 5/8" x 5/16" Double Disc Coupling, Aluminum, Clamp Style, 1.313" OD, 1.770" Length
Download CAD File:
DCD21-10-6-A
DCD21-10-6-A
As low as
$82.57
$121.10
Ruland DCD21-10-6-A, 5/8" x 3/8" Double Disc Coupling, Aluminum, Clamp Style, 1.313" OD, 1.770" Length
Download CAD File:
DCD21-10-8-A
DCD21-10-8-A
As low as
$82.57
$121.10
Ruland DCD21-10-8-A, 5/8" x 1/2" Double Disc Coupling, Aluminum, Clamp Style, 1.313" OD, 1.770" Length
Download CAD File:
DCD21-5/8\"-10MM-A
DCD21-5/8"-10MM-A
As low as
$82.57
$121.10
Ruland DCD21-5/8"-10MM-A, 5/8" x 10mm Double Disc Coupling, Aluminum, Clamp Style, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length
Download CAD File:
DCD21-5/8\"-11MM-A
DCD21-5/8"-11MM-A
As low as
$82.57
$121.10
Ruland DCD21-5/8"-11MM-A, 5/8" x 11mm Double Disc Coupling, Aluminum, Clamp Style, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length
Download CAD File:
DCD21-5/8\"-12MM-A
DCD21-5/8"-12MM-A
As low as
$82.57
$121.10
Ruland DCD21-5/8"-12MM-A, 5/8" x 12mm Double Disc Coupling, Aluminum, Clamp Style, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length
Download CAD File:
DCD21-5/8\"-13MM-A
DCD21-5/8"-13MM-A
As low as
$82.57
$121.10
Ruland DCD21-5/8"-13MM-A, 5/8" x 13mm Double Disc Coupling, Aluminum, Clamp Style, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length
Download CAD File:
DCD21-5/8\"-14MM-A
DCD21-5/8"-14MM-A
As low as
$82.57
$121.10
Ruland DCD21-5/8"-14MM-A, 5/8" x 14mm Double Disc Coupling, Aluminum, Clamp Style, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length
Download CAD File:
DCD21-5/8\"-15MM-A
DCD21-5/8"-15MM-A
As low as
$82.57
$121.10
Ruland DCD21-5/8"-15MM-A, 5/8" x 15mm Double Disc Coupling, Aluminum, Clamp Style, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length
Download CAD File:
DCD21-5/8\"-8MM-A
DCD21-5/8"-8MM-A
As low as
$82.57
$121.10
Ruland DCD21-5/8"-8MM-A, 5/8" x 8mm Double Disc Coupling, Aluminum, Clamp Style, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length
Download CAD File:
DCD21-5/8\"-9MM-A
DCD21-5/8"-9MM-A
As low as
$82.57
$121.10
Ruland DCD21-5/8"-9MM-A, 5/8" x 9mm Double Disc Coupling, Aluminum, Clamp Style, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length
Download CAD File:
DCD26-10-10-A
DCD26-10-10-A
As low as
$93.46
$137.07
Ruland DCD26-10-10-A, 5/8" x 5/8" Double Disc Coupling, Aluminum, Clamp Style, 1.625" OD, 2.165" Length
Download CAD File:
DCD26-10-6-A
DCD26-10-6-A
As low as
$93.46
$137.07
Ruland DCD26-10-6-A, 5/8" x 3/8" Double Disc Coupling, Aluminum, Clamp Style, 1.625" OD, 2.165" Length
Download CAD File:
DCD26-10-8-A
DCD26-10-8-A
As low as
$93.46
$137.07
Ruland DCD26-10-8-A, 5/8" x 1/2" Double Disc Coupling, Aluminum, Clamp Style, 1.625" OD, 2.165" Length
Download CAD File:
DCD26-5/8\"-10MM-A
DCD26-5/8"-10MM-A
As low as
$93.46
$137.07
Ruland DCD26-5/8"-10MM-A, 5/8" x 10mm Double Disc Coupling, Aluminum, Clamp Style, 1.625" (41.3mm) OD, 2.165" (55.0mm) Length
Download CAD File:
DCD26-5/8\"-11MM-A
DCD26-5/8"-11MM-A
As low as
$93.46
$137.07
Ruland DCD26-5/8"-11MM-A, 5/8" x 11mm Double Disc Coupling, Aluminum, Clamp Style, 1.625" (41.3mm) OD, 2.165" (55.0mm) Length
Download CAD File:
DCD26-5/8\"-12MM-A
DCD26-5/8"-12MM-A
As low as
$93.46
$137.07
Ruland DCD26-5/8"-12MM-A, 5/8" x 12mm Double Disc Coupling, Aluminum, Clamp Style, 1.625" (41.3mm) OD, 2.165" (55.0mm) Length
Download CAD File:
DCD26-5/8\"-13MM-A
DCD26-5/8"-13MM-A
As low as
$93.46
$137.07
Ruland DCD26-5/8"-13MM-A, 5/8" x 13mm Double Disc Coupling, Aluminum, Clamp Style, 1.625" (41.3mm) OD, 2.165" (55.0mm) Length
Download CAD File:
DCD26-5/8\"-14MM-A
DCD26-5/8"-14MM-A
As low as
$93.46
$137.07
Ruland DCD26-5/8"-14MM-A, 5/8" x 14mm Double Disc Coupling, Aluminum, Clamp Style, 1.625" (41.3mm) OD, 2.165" (55.0mm) Length
Download CAD File:
DCD26-5/8\"-15MM-A
DCD26-5/8"-15MM-A
As low as
$93.46
$137.07
Ruland DCD26-5/8"-15MM-A, 5/8" x 15mm Double Disc Coupling, Aluminum, Clamp Style, 1.625" (41.3mm) OD, 2.165" (55.0mm) Length
Download CAD File:
DCD32-10-10-A
DCD32-10-10-A
As low as
$118.46
$173.75
Ruland DCD32-10-10-A, 5/8" x 5/8" Double Disc Coupling, Aluminum, Clamp Style, 2.000" OD, 2.519" Length
Download CAD File:
DCD32-10-8-A
DCD32-10-8-A
As low as
$118.46
$173.75
Ruland DCD32-10-8-A, 5/8" x 1/2" Double Disc Coupling, Aluminum, Clamp Style, 2.000" OD, 2.519" Length
Download CAD File:
DCD32-5/8\"-12MM-A
DCD32-5/8"-12MM-A
As low as
$118.46
$173.75
Ruland DCD32-5/8"-12MM-A, 5/8" x 12mm Double Disc Coupling, Aluminum, Clamp Style, 2.000" (50.8mm) OD, 2.519" (64.0mm) Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
DCD21-10-10-A
0.6250 in
0.6250 in
1.770 in
Aluminum
1.313 in
10,000 RPM
DCD21-10-5-A
0.6250 in
0.3125 in
1.770 in
Aluminum
1.313 in
10,000 RPM
DCD21-10-6-A
0.6250 in
0.3750 in
1.770 in
Aluminum
1.313 in
10,000 RPM
DCD21-10-8-A
0.6250 in
0.5000 in
1.770 in
Aluminum
1.313 in
10,000 RPM
DCD21-5/8"-10MM-A
0.6250 in
10 mm
1.770 in (45.0 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
DCD21-5/8"-11MM-A
0.6250 in
11 mm
1.770 in (45.0 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
DCD21-5/8"-12MM-A
0.6250 in
12 mm
1.770 in (45.0 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
DCD21-5/8"-13MM-A
0.6250 in
13 mm
1.770 in (45.0 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
DCD21-5/8"-14MM-A
0.6250 in
14 mm
1.770 in (45.0 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
DCD21-5/8"-15MM-A
0.6250 in
15 mm
1.770 in (45.0 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
DCD21-5/8"-8MM-A
0.6250 in
8 mm
1.770 in (45.0 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
DCD21-5/8"-9MM-A
0.6250 in
9 mm
1.770 in (45.0 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
DCD26-10-10-A
0.6250 in
0.6250 in
2.165 in
Aluminum
1.625 in
10,000 RPM
DCD26-10-6-A
0.6250 in
0.3750 in
2.165 in
Aluminum
1.625 in
10,000 RPM
DCD26-10-8-A
0.6250 in
0.5000 in
2.165 in
Aluminum
1.625 in
10,000 RPM
DCD26-5/8"-10MM-A
0.6250 in
10 mm
2.165 in (55.0 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
DCD26-5/8"-11MM-A
0.6250 in
11 mm
2.165 in (55.0 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
DCD26-5/8"-12MM-A
0.6250 in
12 mm
2.165 in (55.0 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
DCD26-5/8"-13MM-A
0.6250 in
13 mm
2.165 in (55.0 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
DCD26-5/8"-14MM-A
0.6250 in
14 mm
2.165 in (55.0 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
DCD26-5/8"-15MM-A
0.6250 in
15 mm
2.165 in (55.0 mm)
Aluminum
1.625 in (41.3 mm)
10,000 RPM
DCD32-10-10-A
0.6250 in
0.6250 in
2.519 in
Aluminum
2.000 in
10,000 RPM
DCD32-10-8-A
0.6250 in
0.5000 in
2.519 in
Aluminum
2.000 in
10,000 RPM
DCD32-5/8"-12MM-A
0.6250 in
12 mm
2.519 in (64.0 mm)
Aluminum
2.000 in (50.8 mm)
10,000 RPM
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Bore (B1)
0.6250 in
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