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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:
MDCDK51-18-13-A
MDCDK51-18-13-A
As low as
$139.80
$205.04
Ruland MDCDK51-18-13-A, 18mm x 13mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-18-14-A
MDCDK51-18-14-A
As low as
$139.80
$205.04
Ruland MDCDK51-18-14-A, 18mm x 14mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-18-15-A
MDCDK51-18-15-A
As low as
$139.80
$205.04
Ruland MDCDK51-18-15-A, 18mm x 15mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-18-16-A
MDCDK51-18-16-A
As low as
$139.80
$205.04
Ruland MDCDK51-18-16-A, 18mm x 16mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-18-17-A
MDCDK51-18-17-A
As low as
$139.80
$205.04
Ruland MDCDK51-18-17-A, 18mm x 17mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-18-18-A
MDCDK51-18-18-A
As low as
$139.80
$205.04
Ruland MDCDK51-18-18-A, 18mm x 18mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-19-12-A
MDCDK51-19-12-A
As low as
$139.80
$205.04
Ruland MDCDK51-19-12-A, 19mm x 12mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-19-13-A
MDCDK51-19-13-A
As low as
$139.80
$205.04
Ruland MDCDK51-19-13-A, 19mm x 13mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-19-14-A
MDCDK51-19-14-A
As low as
$139.80
$205.04
Ruland MDCDK51-19-14-A, 19mm x 14mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-19-15-A
MDCDK51-19-15-A
As low as
$139.80
$205.04
Ruland MDCDK51-19-15-A, 19mm x 15mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-19-16-A
MDCDK51-19-16-A
As low as
$139.80
$205.04
Ruland MDCDK51-19-16-A, 19mm x 16mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-19-17-A
MDCDK51-19-17-A
As low as
$139.80
$205.04
Ruland MDCDK51-19-17-A, 19mm x 17mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-19-18-A
MDCDK51-19-18-A
As low as
$139.80
$205.04
Ruland MDCDK51-19-18-A, 19mm x 18mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-19-19-A
MDCDK51-19-19-A
As low as
$139.80
$205.04
Ruland MDCDK51-19-19-A, 19mm x 19mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-20-12-A
MDCDK51-20-12-A
As low as
$139.80
$205.04
Ruland MDCDK51-20-12-A, 20mm x 12mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-20-13-A
MDCDK51-20-13-A
As low as
$139.80
$205.04
Ruland MDCDK51-20-13-A, 20mm x 13mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-20-14-A
MDCDK51-20-14-A
As low as
$139.80
$205.04
Ruland MDCDK51-20-14-A, 20mm x 14mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-20-15-A
MDCDK51-20-15-A
As low as
$139.80
$205.04
Ruland MDCDK51-20-15-A, 20mm x 15mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-20-16-A
MDCDK51-20-16-A
As low as
$139.80
$205.04
Ruland MDCDK51-20-16-A, 20mm x 16mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-20-17-A
MDCDK51-20-17-A
As low as
$139.80
$205.04
Ruland MDCDK51-20-17-A, 20mm x 17mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-20-18-A
MDCDK51-20-18-A
As low as
$139.80
$205.04
Ruland MDCDK51-20-18-A, 20mm x 18mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-20-19-A
MDCDK51-20-19-A
As low as
$139.80
$205.04
Ruland MDCDK51-20-19-A, 20mm x 19mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-20-20-A
MDCDK51-20-20-A
As low as
$139.80
$205.04
Ruland MDCDK51-20-20-A, 20mm x 20mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Download CAD File:
MDCDK51-22-12-A
MDCDK51-22-12-A
As low as
$139.80
$205.04
Ruland MDCDK51-22-12-A, 22mm x 12mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 50.8mm OD, 64.0mm Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
MDCDK51-18-13-A
18 mm
13 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-18-14-A
18 mm
14 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-18-15-A
18 mm
15 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-18-16-A
18 mm
16 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-18-17-A
18 mm
17 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-18-18-A
18 mm
18 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-19-12-A
19 mm
12 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-19-13-A
19 mm
13 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-19-14-A
19 mm
14 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-19-15-A
19 mm
15 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-19-16-A
19 mm
16 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-19-17-A
19 mm
17 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-19-18-A
19 mm
18 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-19-19-A
19 mm
19 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-20-12-A
20 mm
12 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-20-13-A
20 mm
13 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-20-14-A
20 mm
14 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-20-15-A
20 mm
15 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-20-16-A
20 mm
16 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-20-17-A
20 mm
17 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-20-18-A
20 mm
18 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-20-19-A
20 mm
19 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-20-20-A
20 mm
20 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
MDCDK51-22-12-A
22 mm
12 mm
64.0 mm
Aluminum
50.8 mm
10,000 RPM
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Static Torque
39.6 Nm
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