The store will not work correctly in the case when cookies are disabled.
JavaScript seems to be disabled in your browser.
For the best experience on our site, be sure to turn on Javascript in your browser.
Due to Microsoft's discontinuation of updates, including security, certain functionality such as checkout and CAD may not work for you. We recommend using Google Chrome, Microsoft Edge, Firefox, or Safari to ensure full functionality.Thank you - the Ruland team
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:
DCD16-3/8\"-6MM-A
DCD16-3/8"-6MM-A
As low as
$75.74
$111.08
Ruland DCD16-3/8"-6MM-A, 3/8" x 6mm Double Disc Coupling, Aluminum, Clamp Style, 1.000" (25.4mm) OD, 1.374" (34.9mm) Length
Download CAD File:
DCD16-3/8\"-7MM-A
DCD16-3/8"-7MM-A
As low as
$75.74
$111.08
Ruland DCD16-3/8"-7MM-A, 3/8" x 7mm Double Disc Coupling, Aluminum, Clamp Style, 1.000" (25.4mm) OD, 1.374" (34.9mm) Length
Download CAD File:
DCD16-3/8\"-8MM-A
DCD16-3/8"-8MM-A
As low as
$75.74
$111.08
Ruland DCD16-3/8"-8MM-A, 3/8" x 8mm Double Disc Coupling, Aluminum, Clamp Style, 1.000" (25.4mm) OD, 1.374" (34.9mm) Length
Download CAD File:
DCD16-3/8\"-9MM-A
DCD16-3/8"-9MM-A
As low as
$75.74
$111.08
Ruland DCD16-3/8"-9MM-A, 3/8" x 9mm Double Disc Coupling, Aluminum, Clamp Style, 1.000" (25.4mm) OD, 1.374" (34.9mm) Length
Download CAD File:
DCD16-6-4-A
DCD16-6-4-A
As low as
$75.74
$111.08
Ruland DCD16-6-4-A, 3/8" x 1/4" Double Disc Coupling, Aluminum, Clamp Style, 1.000" OD, 1.374" Length
Download CAD File:
DCD16-6-5-A
DCD16-6-5-A
As low as
$75.74
$111.08
Ruland DCD16-6-5-A, 3/8" x 5/16" Double Disc Coupling, Aluminum, Clamp Style, 1.000" OD, 1.374" Length
Download CAD File:
DCD16-6-6-A
DCD16-6-6-A
As low as
$75.74
$111.08
Ruland DCD16-6-6-A, 3/8" x 3/8" Double Disc Coupling, Aluminum, Clamp Style, 1.000" OD, 1.374" Length
Download CAD File:
DCD21-3/8\"-8MM-A
DCD21-3/8"-8MM-A
As low as
$82.57
$121.10
Ruland DCD21-3/8"-8MM-A, 3/8" x 8mm Double Disc Coupling, Aluminum, Clamp Style, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length
Download CAD File:
DCD21-3/8\"-9MM-A
DCD21-3/8"-9MM-A
As low as
$82.57
$121.10
Ruland DCD21-3/8"-9MM-A, 3/8" x 9mm Double Disc Coupling, Aluminum, Clamp Style, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length
Download CAD File:
DCD21-6-5-A
DCD21-6-5-A
As low as
$82.57
$121.10
Ruland DCD21-6-5-A, 3/8" x 5/16" Double Disc Coupling, Aluminum, Clamp Style, 1.313" OD, 1.770" Length
Download CAD File:
DCD21-6-6-A
DCD21-6-6-A
As low as
$82.57
$121.10
Ruland DCD21-6-6-A, 3/8" x 3/8" Double Disc Coupling, Aluminum, Clamp Style, 1.313" OD, 1.770" Length
Download CAD File:
DCD26-6-6-A
DCD26-6-6-A
As low as
$93.46
$137.07
Ruland DCD26-6-6-A, 3/8" x 3/8" Double Disc Coupling, Aluminum, Clamp Style, 1.625" OD, 2.165" Length
Download CAD File:
DCDK16-3/8\"-6MM-A
DCDK16-3/8"-6MM-A
As low as
$87.59
$128.47
Ruland DCDK16-3/8"-6MM-A, 3/8" x 6mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.000" (25.4mm) OD, 1.374" (34.9mm) Length
Download CAD File:
DCDK16-3/8\"-7MM-A
DCDK16-3/8"-7MM-A
As low as
$87.59
$128.47
Ruland DCDK16-3/8"-7MM-A, 3/8" x 7mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.000" (25.4mm) OD, 1.374" (34.9mm) Length
Download CAD File:
DCDK16-3/8\"-8MM-A
DCDK16-3/8"-8MM-A
As low as
$87.59
$128.47
Ruland DCDK16-3/8"-8MM-A, 3/8" x 8mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.000" (25.4mm) OD, 1.374" (34.9mm) Length
Download CAD File:
DCDK16-3/8\"-9MM-A
DCDK16-3/8"-9MM-A
As low as
$87.59
$128.47
Ruland DCDK16-3/8"-9MM-A, 3/8" x 9mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.000" (25.4mm) OD, 1.374" (34.9mm) Length
Download CAD File:
DCDK16-6-4-A
DCDK16-6-4-A
As low as
$87.59
$128.47
Ruland DCDK16-6-4-A, 3/8" x 1/4" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.000" OD, 1.374" Length
Download CAD File:
DCDK16-6-5-A
DCDK16-6-5-A
As low as
$87.59
$128.47
Ruland DCDK16-6-5-A, 3/8" x 5/16" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.000" OD, 1.374" Length
Download CAD File:
DCDK16-6-6-A
DCDK16-6-6-A
As low as
$87.59
$128.47
Ruland DCDK16-6-6-A, 3/8" x 3/8" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.000" OD, 1.374" Length
Download CAD File:
DCDK21-3/8\"-8MM-A
DCDK21-3/8"-8MM-A
As low as
$96.39
$141.37
Ruland DCDK21-3/8"-8MM-A, 3/8" x 8mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length
Download CAD File:
DCDK21-3/8\"-9MM-A
DCDK21-3/8"-9MM-A
As low as
$96.39
$141.37
Ruland DCDK21-3/8"-9MM-A, 3/8" x 9mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length
Download CAD File:
DCDK21-6-5-A
DCDK21-6-5-A
As low as
$96.39
$141.37
Ruland DCDK21-6-5-A, 3/8" x 5/16" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" OD, 1.770" Length
Download CAD File:
DCDK21-6-6-A
DCDK21-6-6-A
As low as
$96.39
$141.37
Ruland DCDK21-6-6-A, 3/8" x 3/8" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" OD, 1.770" Length
Download CAD File:
DCDK26-6-6-A
DCDK26-6-6-A
As low as
$110.92
$162.68
Ruland DCDK26-6-6-A, 3/8" x 3/8" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.625" OD, 2.165" Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
DCD16-3/8"-6MM-A
0.3750 in
6 mm
1.374 in (34.9 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
DCD16-3/8"-7MM-A
0.3750 in
7 mm
1.374 in (34.9 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
DCD16-3/8"-8MM-A
0.3750 in
8 mm
1.374 in (34.9 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
DCD16-3/8"-9MM-A
0.3750 in
9 mm
1.374 in (34.9 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
DCD16-6-4-A
0.3750 in
0.2500 in
1.374 in
Aluminum
1.000 in
10,000 RPM
DCD16-6-5-A
0.3750 in
0.3125 in
1.374 in
Aluminum
1.000 in
10,000 RPM
DCD16-6-6-A
0.3750 in
0.3750 in
1.374 in
Aluminum
1.000 in
10,000 RPM
DCD21-3/8"-8MM-A
0.3750 in
8 mm
1.770 in (45.0 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
DCD21-3/8"-9MM-A
0.3750 in
9 mm
1.770 in (45.0 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
DCD21-6-5-A
0.3750 in
0.3125 in
1.770 in
Aluminum
1.313 in
10,000 RPM
DCD21-6-6-A
0.3750 in
0.3750 in
1.770 in
Aluminum
1.313 in
10,000 RPM
DCD26-6-6-A
0.3750 in
0.3750 in
2.165 in
Aluminum
1.625 in
10,000 RPM
DCDK16-3/8"-6MM-A
0.3750 in
6 mm
1.374 in (34.9 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
DCDK16-3/8"-7MM-A
0.3750 in
7 mm
1.374 in (34.9 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
DCDK16-3/8"-8MM-A
0.3750 in
8 mm
1.374 in (34.9 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
DCDK16-3/8"-9MM-A
0.3750 in
9 mm
1.374 in (34.9 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
DCDK16-6-4-A
0.3750 in
0.2500 in
1.374 in
Aluminum
1.000 in
10,000 RPM
DCDK16-6-5-A
0.3750 in
0.3125 in
1.374 in
Aluminum
1.000 in
10,000 RPM
DCDK16-6-6-A
0.3750 in
0.3750 in
1.374 in
Aluminum
1.000 in
10,000 RPM
DCDK21-3/8"-8MM-A
0.3750 in
8 mm
1.770 in (45.0 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
DCDK21-3/8"-9MM-A
0.3750 in
9 mm
1.770 in (45.0 mm)
Aluminum
1.313 in (33.3 mm)
10,000 RPM
DCDK21-6-5-A
0.3750 in
0.3125 in
1.770 in
Aluminum
1.313 in
10,000 RPM
DCDK21-6-6-A
0.3750 in
0.3750 in
1.770 in
Aluminum
1.313 in
10,000 RPM
DCDK26-6-6-A
0.3750 in
0.3750 in
2.165 in
Aluminum
1.625 in
10,000 RPM
Filter
Now Shopping by
Bore (B1)
0.3750 in
Shopping Options
© 2024 Ruland Manufacturing Co., Inc. All rights reserved
Top 
