Disc Couplings: Flexible, Small Sizes

JUMP TO: About Why Ruland Custom Designs Products

About

Double Disc

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.

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Single Disc

Ruland single disc couplings are comprised of two anodized aluminum hubs and one set of stainless steel disc springs. This design allows them to be used in confined spaces where other styles of coupling may not be able to fit. The single set of disc springs does not allow for any parallel misalignment. 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.

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Electrically Isolating

Ruland electrically isolating double disc couplings are comprised of two anodized aluminum hubs, two sets of stainless steel disc springs, and an acetal center spacer. This design allows the sets of disc springs to bend independent of each other to accommodate all forms of misalignment, including parallel. 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 30mm.

EXPLORE >>

Why Ruland?

High torque and torsional stiffness with industry-leading misalignment capabilities due to Ruland’s proprietary disc spring design.
No contaminants will transfer from the coupling to the system because of machining processes that leave a fine, burr-free finish.
Speeds up to 10,000 RPMs with reduced vibrations due to our standard balanced design.
Suitable for a wide variety of precise positioning applications because of the three styles offered:

Single disc for compact installations.
Double disc with an aluminum center spacer for the best balance of torque, stiffness, and misalignment.
Double disc with an acetal center spacer for electrical isolation.

CUSTOM DESIGNS

As a service to our customers, we offer our vast manufacturing experience and talents to meet special needs with custom parts. Our in-house engineering team has extensive experience designing and custom engineering solutions to meet your requirements. If you do not see what you are looking for in our standard line, please inquire about custom options.

Examples of Custom Work

Stainless steel disc coupling
Extra disc springs for stiffness
Extended length of center spacer
Clamp to set screw hubs
Special bore sizes and geometry
Special lengths, widths and outside diameters
Different materials, finishes, or colors
Custom hardware requests
And Many Others... Please Contact Us for More Information

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Download CAD File:
DCD50-42MM-1 1/2\"-A

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DCD50-42MM-1 1/2"-A

As low as $204.90 $300.52

Ruland DCD50-42MM-1 1/2"-A, 42mm x 1 1/2" Double Disc Coupling, Aluminum, Clamp Style, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length

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DCD50-42MM-1 1/4\"-A

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DCD50-42MM-1 1/4"-A

As low as $204.90 $300.52

Ruland DCD50-42MM-1 1/4"-A, 42mm x 1 1/4" Double Disc Coupling, Aluminum, Clamp Style, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length

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DCD50-42MM-1 1/8\"-A

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DCD50-42MM-1 1/8"-A

As low as $204.90 $300.52

Ruland DCD50-42MM-1 1/8"-A, 42mm x 1 1/8" Double Disc Coupling, Aluminum, Clamp Style, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length

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DCD50-42MM-1 3/8\"-A

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DCD50-42MM-1 3/8"-A

As low as $204.90 $300.52

Ruland DCD50-42MM-1 3/8"-A, 42mm x 1 3/8" Double Disc Coupling, Aluminum, Clamp Style, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length

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DCD50-42MM-1 5/8\"-A

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DCD50-42MM-1 5/8"-A

As low as $204.90 $300.52

Ruland DCD50-42MM-1 5/8"-A, 42mm x 1 5/8" Double Disc Coupling, Aluminum, Clamp Style, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length

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DCD50-42MM-1\"-A

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DCD50-42MM-1"-A

As low as $204.90 $300.52

Ruland DCD50-42MM-1"-A, 42mm x 1" Double Disc Coupling, Aluminum, Clamp Style, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length

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DCDK50-42MM-1 1/2\"-A

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DCDK50-42MM-1 1/2"-A

As low as $237.69 $348.61

Ruland DCDK50-42MM-1 1/2"-A, 42MM x 1 1/2" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length

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DCDK50-42MM-1 1/4\"-A

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DCDK50-42MM-1 1/4"-A

As low as $237.69 $348.61

Ruland DCDK50-42MM-1 1/4"-A, 42MM x 1 1/4" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length

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DCDK50-42MM-1 1/8\"-A

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DCDK50-42MM-1 1/8"-A

As low as $237.69 $348.61

Ruland DCDK50-42MM-1 1/8"-A, 42MM x 1 1/8" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length

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DCDK50-42MM-1 3/8\"-A

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DCDK50-42MM-1 3/8"-A

As low as $237.69 $348.61

Ruland DCDK50-42MM-1 3/8"-A, 42MM x 1 3/8" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length

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DCDK50-42MM-1 5/8\"-A

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DCDK50-42MM-1 5/8"-A

As low as $237.69 $348.61

Ruland DCDK50-42MM-1 5/8"-A, 42MM x 1 5/8" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length

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DCDK50-42MM-1\"-A

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DCDK50-42MM-1"-A

As low as $237.69 $348.61

Ruland DCDK50-42MM-1"-A, 42MM x 1" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 3.125" (79.4mm) OD, 3.938" (100.0mm) Length

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MDCD80-42-25-A

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MDCD80-42-25-A

As low as $204.90 $300.52

Ruland MDCD80-42-25-A, 42mm x 25mm Double Disc Coupling, Aluminum, Clamp Style, 79.4mm OD, 100.00 mm Length

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MDCD80-42-28-A

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MDCD80-42-28-A

As low as $204.90 $300.52

Ruland MDCD80-42-28-A, 42mm x 28mm Double Disc Coupling, Aluminum, Clamp Style, 79.4mm OD, 100.00 mm Length

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MDCD80-42-30-A

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MDCD80-42-30-A

As low as $204.90 $300.52

Ruland MDCD80-42-30-A, 42mm x 30mm Double Disc Coupling, Aluminum, Clamp Style, 79.4mm OD, 100.00 mm Length

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MDCD80-42-32-A

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MDCD80-42-32-A

As low as $204.90 $300.52

Ruland MDCD80-42-32-A, 42mm x 32mm Double Disc Coupling, Aluminum, Clamp Style, 79.4mm OD, 100.00 mm Length

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MDCD80-42-35-A

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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

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MDCD80-42-38-A

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MDCD80-42-38-A

As low as $204.90 $300.52

Ruland MDCD80-42-38-A, 42mm x 38mm Double Disc Coupling, Aluminum, Clamp Style, 79.4mm OD, 100.00 mm Length

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MDCD80-42-40-A

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MDCD80-42-40-A

As low as $204.90 $300.52

Ruland MDCD80-42-40-A, 42mm x 40mm Double Disc Coupling, Aluminum, Clamp Style, 79.4mm OD, 100.00 mm Length

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MDCD80-42-42-A

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MDCD80-42-42-A

As low as $204.90 $300.52

Ruland MDCD80-42-42-A, 42mm x 42mm Double Disc Coupling, Aluminum, Clamp Style, 79.4mm OD, 100.00 mm Length

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MDCDK80-42-25-A

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MDCDK80-42-25-A

As low as $237.69 $348.61

Ruland MDCDK80-42-25-A, 42mm x 25mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 79.4mm OD, 100.00 mm Length

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MDCDK80-42-28-A

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MDCDK80-42-28-A

As low as $237.69 $348.61

Ruland MDCDK80-42-28-A, 42mm x 28mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 79.4mm OD, 100.00 mm Length

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Download CAD File:
MDCDK80-42-30-A

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MDCDK80-42-30-A

As low as $237.69 $348.61

Ruland MDCDK80-42-30-A, 42mm x 30mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 79.4mm OD, 100.00 mm Length

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MDCDK80-42-32-A

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MDCDK80-42-32-A

As low as $237.69 $348.61

Ruland MDCDK80-42-32-A, 42mm x 32mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 79.4mm OD, 100.00 mm Length

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Part number	Bore (B1)	Small Bore (B2)	Length (L)	Material	Outer Diameter (OD)	Maximum Speed
DCD50-42MM-1 1/2"-A	42 mm	1.5000 in	3.938 in (100.0 mm)	Aluminum	3.125 in (79.4 mm)	10,000 RPM
DCD50-42MM-1 1/4"-A	42 mm	1.2500 in	3.938 in (100.0 mm)	Aluminum	3.125 in (79.4 mm)	10,000 RPM
DCD50-42MM-1 1/8"-A	42 mm	1.1250 in	3.938 in (100.0 mm)	Aluminum	3.125 in (79.4 mm)	10,000 RPM
DCD50-42MM-1 3/8"-A	42 mm	1.3750 in	3.938 in (100.0 mm)	Aluminum	3.125 in (79.4 mm)	10,000 RPM
DCD50-42MM-1 5/8"-A	42 mm	1.6250 in	3.938 in (100.0 mm)	Aluminum	3.125 in (79.4 mm)	10,000 RPM
DCD50-42MM-1"-A	42 mm	1.0000 in	3.938 in (100.0 mm)	Aluminum	3.125 in (79.4 mm)	10,000 RPM
DCDK50-42MM-1 1/2"-A	42 mm	1.5000 in	3.938 in (100.0 mm)	Aluminum	3.125 in (79.4 mm)	10,000 RPM
DCDK50-42MM-1 1/4"-A	42 mm	1.2500 in	3.938 in (100.0 mm)	Aluminum	3.125 in (79.4 mm)	10,000 RPM
DCDK50-42MM-1 1/8"-A	42 mm	1.1250 in	3.938 in (100.0 mm)	Aluminum	3.125 in (79.4 mm)	10,000 RPM
DCDK50-42MM-1 3/8"-A	42 mm	1.3750 in	3.938 in (100.0 mm)	Aluminum	3.125 in (79.4 mm)	10,000 RPM
DCDK50-42MM-1 5/8"-A	42 mm	1.6250 in	3.938 in (100.0 mm)	Aluminum	3.125 in (79.4 mm)	10,000 RPM
DCDK50-42MM-1"-A	42 mm	1.0000 in	3.938 in (100.0 mm)	Aluminum	3.125 in (79.4 mm)	10,000 RPM
MDCD80-42-25-A	42 mm	25 mm	100.0 mm	Aluminum	79.4 mm	10,000 RPM
MDCD80-42-28-A	42 mm	28 mm	100.0 mm	Aluminum	79.4 mm	10,000 RPM
MDCD80-42-30-A	42 mm	30 mm	100.0 mm	Aluminum	79.4 mm	10,000 RPM
MDCD80-42-32-A	42 mm	32 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
MDCD80-42-38-A	42 mm	38 mm	100.0 mm	Aluminum	79.4 mm	10,000 RPM
MDCD80-42-40-A	42 mm	40 mm	100.0 mm	Aluminum	79.4 mm	10,000 RPM
MDCD80-42-42-A	42 mm	42 mm	100.0 mm	Aluminum	79.4 mm	10,000 RPM
MDCDK80-42-25-A	42 mm	25 mm	100.0 mm	Aluminum	79.4 mm	10,000 RPM
MDCDK80-42-28-A	42 mm	28 mm	100.0 mm	Aluminum	79.4 mm	10,000 RPM
MDCDK80-42-30-A	42 mm	30 mm	100.0 mm	Aluminum	79.4 mm	10,000 RPM
MDCDK80-42-32-A	42 mm	32 mm	100.0 mm	Aluminum	79.4 mm	10,000 RPM

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