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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:
DCD10-1/4\"-6MM-A
DCD10-1/4"-6MM-A
As low as
$72.73
$106.67
Ruland DCD10-1/4"-6MM-A, 1/4" x 6mm Double Disc Coupling, Aluminum, Clamp Style, 0.590" (15.0mm) OD, 0.937" (23.8mm) Length
Download CAD File:
DCD12-1/4\"-6MM-A
DCD12-1/4"-6MM-A
As low as
$68.17
$99.98
Ruland DCD12-1/4"-6MM-A, 1/4" x 6mm Double Disc Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.189" (30.2mm) Length
Download CAD File:
DCD12-5/16\"-6MM-A
DCD12-5/16"-6MM-A
As low as
$68.17
$99.98
Ruland DCD12-5/16"-6MM-A, 5/16" x 6mm Double Disc Coupling, Aluminum, Clamp Style, 0.750" (19.1mm) OD, 1.189" (30.2mm) Length
Download CAD File:
DCD16-1/2\"-6MM-A
DCD16-1/2"-6MM-A
As low as
$75.74
$111.08
Ruland DCD16-1/2"-6MM-A, 1/2" x 6mm Double Disc Coupling, Aluminum, Clamp Style, 1.000" (25.4mm) OD, 1.374" (34.9mm) Length
Download CAD File:
DCD16-1/4\"-6MM-A
DCD16-1/4"-6MM-A
As low as
$75.74
$111.08
Ruland DCD16-1/4"-6MM-A, 1/4" x 6mm Double Disc Coupling, Aluminum, Clamp Style, 1.000" (25.4mm) OD, 1.374" (34.9mm) Length
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:
DCD16-5/16\"-6MM-A
DCD16-5/16"-6MM-A
As low as
$75.74
$111.08
Ruland DCD16-5/16"-6MM-A, 5/16" x 6mm Double Disc Coupling, Aluminum, Clamp Style, 1.000" (25.4mm) OD, 1.374" (34.9mm) Length
Download CAD File:
DCDK16-1/2\"-6MM-A
DCDK16-1/2"-6MM-A
As low as
$87.59
$128.47
Ruland DCDK16-1/2"-6MM-A, 1/2" 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\"-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:
MDCD15-6-6-A
MDCD15-6-6-A
As low as
$72.73
$106.67
Ruland MDCD15-6-6-A, 6mm x 6mm Double Disc Coupling, Aluminum, Clamp Style, 15.0mm OD, 23.8mm Length
Download CAD File:
MDCD19-6-6-A
MDCD19-6-6-A
As low as
$68.17
$99.98
Ruland MDCD19-6-6-A, 6mm x 6mm Double Disc Coupling, Aluminum, Clamp Style, 19.1mm OD, 30.2mm Length
Download CAD File:
MDCD19-7-6-A
MDCD19-7-6-A
As low as
$68.17
$99.98
Ruland MDCD19-7-6-A, 7mm x 6mm Double Disc Coupling, Aluminum, Clamp Style, 19.1mm OD, 30.2mm Length
Download CAD File:
MDCD19-8-6-A
MDCD19-8-6-A
As low as
$68.17
$99.98
Ruland MDCD19-8-6-A, 8mm x 6mm Double Disc Coupling, Aluminum, Clamp Style, 19.1mm OD, 30.2mm Length
Download CAD File:
MDCD25-10-6-A
MDCD25-10-6-A
As low as
$75.74
$111.08
Ruland MDCD25-10-6-A, 10mm x 6mm Double Disc Coupling, Aluminum, Clamp Style, 25.4mm OD, 34.9mm Length
Download CAD File:
MDCD25-11-6-A
MDCD25-11-6-A
As low as
$75.74
$111.08
Ruland MDCD25-11-6-A, 11mm x 6mm Double Disc Coupling, Aluminum, Clamp Style, 25.4mm OD, 34.9mm Length
Download CAD File:
MDCD25-12-6-A
MDCD25-12-6-A
As low as
$75.74
$111.08
Ruland MDCD25-12-6-A, 12mm x 6mm Double Disc Coupling, Aluminum, Clamp Style, 25.4mm OD, 34.9mm Length
Download CAD File:
MDCD25-6-6-A
MDCD25-6-6-A
As low as
$75.74
$111.08
Ruland MDCD25-6-6-A, 6mm x 6mm Double Disc Coupling, Aluminum, Clamp Style, 25.4mm OD, 34.9mm Length
Download CAD File:
MDCD25-7-6-A
MDCD25-7-6-A
As low as
$75.74
$111.08
Ruland MDCD25-7-6-A, 7mm x 6mm Double Disc Coupling, Aluminum, Clamp Style, 25.4mm OD, 34.9mm Length
Download CAD File:
MDCD25-8-6-A
MDCD25-8-6-A
As low as
$75.74
$111.08
Ruland MDCD25-8-6-A, 8mm x 6mm Double Disc Coupling, Aluminum, Clamp Style, 25.4mm OD, 34.9mm Length
Download CAD File:
MDCD25-9-6-A
MDCD25-9-6-A
As low as
$75.74
$111.08
Ruland MDCD25-9-6-A, 9mm x 6mm Double Disc Coupling, Aluminum, Clamp Style, 25.4mm OD, 34.9mm Length
Download CAD File:
MDCDK25-10-6-A
MDCDK25-10-6-A
As low as
$87.59
$128.47
Ruland MDCDK25-10-6-A, 10mm x 6mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 25.4mm OD, 34.9mm Length
Download CAD File:
MDCDK25-11-6-A
MDCDK25-11-6-A
As low as
$87.59
$128.47
Ruland MDCDK25-11-6-A, 11mm x 6mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 25.4mm OD, 34.9mm Length
Download CAD File:
MDCDK25-12-6-A
MDCDK25-12-6-A
As low as
$87.59
$128.47
Ruland MDCDK25-12-6-A, 12mm x 6mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 25.4mm OD, 34.9mm Length
Download CAD File:
MDCDK25-7-6-A
MDCDK25-7-6-A
As low as
$87.59
$128.47
Ruland MDCDK25-7-6-A, 7mm x 6mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 25.4mm OD, 34.9mm Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
DCD10-1/4"-6MM-A
0.2500 in
6 mm
0.937 in (23.8 mm)
Aluminum
0.590 in (15.0 mm)
10,000 RPM
DCD12-1/4"-6MM-A
0.2500 in
6 mm
1.189 in (30.2 mm)
Aluminum
0.750 in (19.1 mm)
10,000 RPM
DCD12-5/16"-6MM-A
0.3125 in
6 mm
1.189 in (30.2 mm)
Aluminum
0.750 in (19.1 mm)
10,000 RPM
DCD16-1/2"-6MM-A
0.5000 in
6 mm
1.374 in (34.9 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
DCD16-1/4"-6MM-A
0.2500 in
6 mm
1.374 in (34.9 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
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
DCD16-5/16"-6MM-A
0.3125 in
6 mm
1.374 in (34.9 mm)
Aluminum
1.000 in (25.4 mm)
10,000 RPM
DCDK16-1/2"-6MM-A
0.5000 in
6 mm
1.374 in (34.9 mm)
Aluminum
1.000 in (25.4 mm)
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
MDCD15-6-6-A
6 mm
6 mm
23.8 mm
Aluminum
15.0 mm
10,000 RPM
MDCD19-6-6-A
6 mm
6 mm
30.2 mm
Aluminum
19.1 mm
10,000 RPM
MDCD19-7-6-A
7 mm
6 mm
30.2 mm
Aluminum
19.1 mm
10,000 RPM
MDCD19-8-6-A
8 mm
6 mm
30.2 mm
Aluminum
19.1 mm
10,000 RPM
MDCD25-10-6-A
10 mm
6 mm
34.9 mm
Aluminum
25.4 mm
10,000 RPM
MDCD25-11-6-A
11 mm
6 mm
34.9 mm
Aluminum
25.4 mm
10,000 RPM
MDCD25-12-6-A
12 mm
6 mm
34.9 mm
Aluminum
25.4 mm
10,000 RPM
MDCD25-6-6-A
6 mm
6 mm
34.9 mm
Aluminum
25.4 mm
10,000 RPM
MDCD25-7-6-A
7 mm
6 mm
34.9 mm
Aluminum
25.4 mm
10,000 RPM
MDCD25-8-6-A
8 mm
6 mm
34.9 mm
Aluminum
25.4 mm
10,000 RPM
MDCD25-9-6-A
9 mm
6 mm
34.9 mm
Aluminum
25.4 mm
10,000 RPM
MDCDK25-10-6-A
10 mm
6 mm
34.9 mm
Aluminum
25.4 mm
10,000 RPM
MDCDK25-11-6-A
11 mm
6 mm
34.9 mm
Aluminum
25.4 mm
10,000 RPM
MDCDK25-12-6-A
12 mm
6 mm
34.9 mm
Aluminum
25.4 mm
10,000 RPM
MDCDK25-7-6-A
7 mm
6 mm
34.9 mm
Aluminum
25.4 mm
10,000 RPM
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Small Bore (B2)
6 mm
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