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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:
DCD44-1 1/2\"-35MM-A
DCD44-1 1/2"-35MM-A
As low as
$178.18
$261.33
Ruland DCD44-1 1/2"-35MM-A, 1 1/2" x 35mm Double Disc Coupling, Aluminum, Clamp Style, 2.750" (69.9mm) OD, 3.531" (89.7mm) Length
Download CAD File:
DCD50-1 1/2\"-35MM-A
DCD50-1 1/2"-35MM-A
As low as
$204.90
$300.52
Ruland DCD50-1 1/2"-35MM-A, 1 1/2" x 35mm Double Disc Coupling, Aluminum, Clamp Style, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length
Download CAD File:
DCD50-1 3/4\"-35MM-A
DCD50-1 3/4"-35MM-A
As low as
$204.90
$300.52
Ruland DCD50-1 3/4"-35MM-A, 1 3/4" x 35mm Double Disc Coupling, Aluminum, Clamp Style, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length
Download CAD File:
DCD50-1 5/8\"-35MM-A
DCD50-1 5/8"-35MM-A
As low as
$204.90
$300.52
Ruland DCD50-1 5/8"-35MM-A, 1 5/8" x 35mm Double Disc Coupling, Aluminum, Clamp Style, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length
Download CAD File:
DCDK44-1 1/2\"-35MM-A
DCDK44-1 1/2"-35MM-A
As low as
$206.68
$303.13
Ruland DCDK44-1 1/2"-35MM-A, 1 1/2" x 35MM Double Disc Coupling, Aluminum, Clamp Style With Keyway, 2.750" (69.9mm) OD, 3.531" (89.7 mm) Length
Download CAD File:
DCDK50-1 1/2\"-35MM-A
DCDK50-1 1/2"-35MM-A
As low as
$237.69
$348.61
Ruland DCDK50-1 1/2"-35MM-A, 1 1/2" x 35MM Double Disc Coupling, Aluminum, Clamp Style With Keyway, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length
Download CAD File:
DCDK50-1 3/4\"-35MM-A
DCDK50-1 3/4"-35MM-A
As low as
$237.69
$348.61
Ruland DCDK50-1 3/4"-35MM-A, 1 3/4" x 35MM Double Disc Coupling, Aluminum, Clamp Style With Keyway, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length
Download CAD File:
DCDK50-1 5/8\"-35MM-A
DCDK50-1 5/8"-35MM-A
As low as
$237.69
$348.61
Ruland DCDK50-1 5/8"-35MM-A, 1 5/8" x 35MM Double Disc Coupling, Aluminum, Clamp Style With Keyway, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length
Download CAD File:
MDCD70-35-35-A
MDCD70-35-35-A
As low as
$178.18
$261.33
Ruland MDCD70-35-35-A, 35mm x 35mm Double Disc Coupling, Aluminum, Clamp Style, 69.9mm OD, 89.7 mm Length
Download CAD File:
MDCD70-38-35-A
MDCD70-38-35-A
As low as
$178.18
$261.33
Ruland MDCD70-38-35-A, 38mm x 35mm Double Disc Coupling, Aluminum, Clamp Style, 69.9mm OD, 89.7 mm Length
Download CAD File:
MDCD80-35-35-A
MDCD80-35-35-A
As low as
$204.90
$300.52
Ruland MDCD80-35-35-A, 35mm x 35mm Double Disc Coupling, Aluminum, Clamp Style, 79.4mm OD, 100.00 mm Length
Download CAD File:
MDCD80-38-35-A
MDCD80-38-35-A
As low as
$204.90
$300.52
Ruland MDCD80-38-35-A, 38mm x 35mm Double Disc Coupling, Aluminum, Clamp Style, 79.4mm OD, 100.00 mm Length
Download CAD File:
MDCD80-40-35-A
MDCD80-40-35-A
As low as
$204.90
$300.52
Ruland MDCD80-40-35-A, 40mm x 35mm Double Disc Coupling, Aluminum, Clamp Style, 79.4mm OD, 100.00 mm Length
Download CAD File:
MDCD80-42-35-A
MDCD80-42-35-A
As low as
$204.90
$300.52
Ruland MDCD80-42-35-A, 42mm x 35mm Double Disc Coupling, Aluminum, Clamp Style, 79.4mm OD, 100.00 mm Length
Download CAD File:
MDCD80-45-35-A
MDCD80-45-35-A
As low as
$204.90
$300.52
Ruland MDCD80-45-35-A, 45mm x 35mm Double Disc Coupling, Aluminum, Clamp Style, 79.4mm OD, 100.00 mm Length
Download CAD File:
MDCDK70-35-35-A
MDCDK70-35-35-A
As low as
$206.68
$303.13
Ruland MDCDK70-35-35-A, 35mm x 35mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 69.9mm OD, 89.7mm Length
Download CAD File:
MDCDK70-38-35-A
MDCDK70-38-35-A
As low as
$206.68
$303.13
Ruland MDCDK70-38-35-A, 38mm x 35mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 69.9mm OD, 89.7mm Length
Download CAD File:
MDCDK80-35-35-A
MDCDK80-35-35-A
As low as
$237.69
$348.61
Ruland MDCDK80-35-35-A, 35mm x 35mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 79.4mm OD, 100.00 mm Length
Download CAD File:
MDCDK80-38-35-A
MDCDK80-38-35-A
As low as
$237.69
$348.61
Ruland MDCDK80-38-35-A, 38mm x 35mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 79.4mm OD, 100.00 mm Length
Download CAD File:
MDCDK80-40-35-A
MDCDK80-40-35-A
As low as
$237.69
$348.61
Ruland MDCDK80-40-35-A, 40mm x 35mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 79.4mm OD, 100.00 mm Length
Download CAD File:
MDCDK80-42-35-A
MDCDK80-42-35-A
As low as
$237.69
$348.61
Ruland MDCDK80-42-35-A, 42mm x 35mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 79.4mm OD, 100.00 mm Length
Download CAD File:
MDCDK80-45-35-A
MDCDK80-45-35-A
As low as
$237.69
$348.61
Ruland MDCDK80-45-35-A, 45mm x 35mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 79.4mm OD, 100.00 mm Length
Part number
Bore (B1)
Small Bore (B2)
Length (L)
Material
Outer Diameter (OD)
Maximum Speed
DCD44-1 1/2"-35MM-A
1.5000 in
35 mm
3.531 in (89.7 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
DCD50-1 1/2"-35MM-A
1.5000 in
35 mm
3.938 in (100.0 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
DCD50-1 3/4"-35MM-A
1.7500 in
35 mm
3.938 in (100.0 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
DCD50-1 5/8"-35MM-A
1.6250 in
35 mm
3.938 in (100.0 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
DCDK44-1 1/2"-35MM-A
1.5000 in
35 mm
3.531 in (89.7 mm)
Aluminum
2.750 in (69.9 mm)
10,000 RPM
DCDK50-1 1/2"-35MM-A
1.5000 in
35 mm
3.938 in (100.0 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
DCDK50-1 3/4"-35MM-A
1.7500 in
35 mm
3.938 in (100.0 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
DCDK50-1 5/8"-35MM-A
1.6250 in
35 mm
3.938 in (100.0 mm)
Aluminum
3.125 in (79.4 mm)
10,000 RPM
MDCD70-35-35-A
35 mm
35 mm
89.7 mm
Aluminum
69.9 mm
10,000 RPM
MDCD70-38-35-A
38 mm
35 mm
89.7 mm
Aluminum
69.9 mm
10,000 RPM
MDCD80-35-35-A
35 mm
35 mm
100.0 mm
Aluminum
79.4 mm
10,000 RPM
MDCD80-38-35-A
38 mm
35 mm
100.0 mm
Aluminum
79.4 mm
10,000 RPM
MDCD80-40-35-A
40 mm
35 mm
100.0 mm
Aluminum
79.4 mm
10,000 RPM
MDCD80-42-35-A
42 mm
35 mm
100.0 mm
Aluminum
79.4 mm
10,000 RPM
MDCD80-45-35-A
45 mm
35 mm
100.0 mm
Aluminum
79.4 mm
10,000 RPM
MDCDK70-35-35-A
35 mm
35 mm
89.7 mm
Aluminum
69.9 mm
10,000 RPM
MDCDK70-38-35-A
38 mm
35 mm
89.7 mm
Aluminum
69.9 mm
10,000 RPM
MDCDK80-35-35-A
35 mm
35 mm
100.0 mm
Aluminum
79.4 mm
10,000 RPM
MDCDK80-38-35-A
38 mm
35 mm
100.0 mm
Aluminum
79.4 mm
10,000 RPM
MDCDK80-40-35-A
40 mm
35 mm
100.0 mm
Aluminum
79.4 mm
10,000 RPM
MDCDK80-42-35-A
42 mm
35 mm
100.0 mm
Aluminum
79.4 mm
10,000 RPM
MDCDK80-45-35-A
45 mm
35 mm
100.0 mm
Aluminum
79.4 mm
10,000 RPM
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Small Bore (B2)
35 mm
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