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:
DCDK21-13MM-3/8\"-A

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DCDK21-13MM-3/8"-A

As low as $96.39 $141.37

Ruland DCDK21-13MM-3/8"-A, 13mm x 3/8" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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DCDK21-13MM-5/16\"-A

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DCDK21-13MM-5/16"-A

As low as $96.39 $141.37

Ruland DCDK21-13MM-5/16"-A, 13mm x 5/16" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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DCDK21-14MM-1/2\"-A

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DCDK21-14MM-1/2"-A

As low as $96.39 $141.37

Ruland DCDK21-14MM-1/2"-A, 14mm x 1/2" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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DCDK21-14MM-3/8\"-A

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DCDK21-14MM-3/8"-A

As low as $96.39 $141.37

Ruland DCDK21-14MM-3/8"-A, 14mm x 3/8" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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DCDK21-14MM-5/16\"-A

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DCDK21-14MM-5/16"-A

As low as $96.39 $141.37

Ruland DCDK21-14MM-5/16"-A, 14mm x 5/16" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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Download CAD File:
DCDK21-15MM-1/2\"-A

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DCDK21-15MM-1/2"-A

As low as $96.39 $141.37

Ruland DCDK21-15MM-1/2"-A, 15mm x 1/2" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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Download CAD File:
DCDK21-15MM-3/8\"-A

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DCDK21-15MM-3/8"-A

As low as $96.39 $141.37

Ruland DCDK21-15MM-3/8"-A, 15mm x 3/8" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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Download CAD File:
DCDK21-15MM-5/16\"-A

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DCDK21-15MM-5/16"-A

As low as $96.39 $141.37

Ruland DCDK21-15MM-5/16"-A, 15mm x 5/16" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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DCDK21-16MM-1/2\"-A

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DCDK21-16MM-1/2"-A

As low as $96.39 $141.37

Ruland DCDK21-16MM-1/2"-A, 16mm x 1/2" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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DCDK21-16MM-3/8\"-A

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DCDK21-16MM-3/8"-A

As low as $96.39 $141.37

Ruland DCDK21-16MM-3/8"-A, 16mm x 3/8" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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DCDK21-16MM-5/16\"-A

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DCDK21-16MM-5/16"-A

As low as $96.39 $141.37

Ruland DCDK21-16MM-5/16"-A, 16mm x 5/16" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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Download CAD File:
DCDK21-16MM-5/8\"-A

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DCDK21-16MM-5/8"-A

As low as $96.39 $141.37

Ruland DCDK21-16MM-5/8"-A, 16mm x 5/8" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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Download CAD File:
DCDK21-3/8\"-8MM-A

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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

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DCDK21-3/8\"-9MM-A

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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

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DCDK21-5/8\"-10MM-A

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DCDK21-5/8"-10MM-A

As low as $96.39 $141.37

Ruland DCDK21-5/8"-10MM-A, 5/8" x 10mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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DCDK21-5/8\"-11MM-A

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DCDK21-5/8"-11MM-A

As low as $96.39 $141.37

Ruland DCDK21-5/8"-11MM-A, 5/8" x 11mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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DCDK21-5/8\"-12MM-A

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DCDK21-5/8"-12MM-A

As low as $96.39 $141.37

Ruland DCDK21-5/8"-12MM-A, 5/8" x 12mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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Download CAD File:
DCDK21-5/8\"-13MM-A

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DCDK21-5/8"-13MM-A

As low as $96.39 $141.37

Ruland DCDK21-5/8"-13MM-A, 5/8" x 13mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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DCDK21-5/8\"-14MM-A

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DCDK21-5/8"-14MM-A

As low as $96.39 $141.37

Ruland DCDK21-5/8"-14MM-A, 5/8" x 14mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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DCDK21-5/8\"-15MM-A

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DCDK21-5/8"-15MM-A

As low as $96.39 $141.37

Ruland DCDK21-5/8"-15MM-A, 5/8" x 15mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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Download CAD File:
DCDK21-5/8\"-8MM-A

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DCDK21-5/8"-8MM-A

As low as $96.39 $141.37

Ruland DCDK21-5/8"-8MM-A, 5/8" x 8mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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DCDK21-5/8\"-9MM-A

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DCDK21-5/8"-9MM-A

As low as $96.39 $141.37

Ruland DCDK21-5/8"-9MM-A, 5/8" x 9mm Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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DCDK21-8MM-5/16\"-A

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DCDK21-8MM-5/16"-A

As low as $96.39 $141.37

Ruland DCDK21-8MM-5/16"-A, 8mm x 5/16" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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Download CAD File:
DCDK21-9MM-5/16\"-A

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DCDK21-9MM-5/16"-A

As low as $96.39 $141.37

Ruland DCDK21-9MM-5/16"-A, 9mm x 5/16" Double Disc Coupling, Aluminum, Clamp Style With Keyway, 1.313" (33.3mm) OD, 1.770" (45.0mm) Length

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Part number	Bore (B1)	Small Bore (B2)	Length (L)	Material	Outer Diameter (OD)	Maximum Speed
DCDK21-13MM-3/8"-A	13 mm	0.3750 in	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-13MM-5/16"-A	13 mm	0.3125 in	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-14MM-1/2"-A	14 mm	0.5000 in	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-14MM-3/8"-A	14 mm	0.3750 in	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-14MM-5/16"-A	14 mm	0.3125 in	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-15MM-1/2"-A	15 mm	0.5000 in	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-15MM-3/8"-A	15 mm	0.3750 in	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-15MM-5/16"-A	15 mm	0.3125 in	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-16MM-1/2"-A	16 mm	0.5000 in	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-16MM-3/8"-A	16 mm	0.3750 in	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-16MM-5/16"-A	16 mm	0.3125 in	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-16MM-5/8"-A	16 mm	0.6250 in	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	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
DCDK21-5/8"-10MM-A	0.6250 in	10 mm	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-5/8"-11MM-A	0.6250 in	11 mm	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-5/8"-12MM-A	0.6250 in	12 mm	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-5/8"-13MM-A	0.6250 in	13 mm	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-5/8"-14MM-A	0.6250 in	14 mm	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-5/8"-15MM-A	0.6250 in	15 mm	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-5/8"-8MM-A	0.6250 in	8 mm	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-5/8"-9MM-A	0.6250 in	9 mm	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-8MM-5/16"-A	8 mm	0.3125 in	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM
DCDK21-9MM-5/16"-A	9 mm	0.3125 in	1.770 in (45.0 mm)	Aluminum	1.313 in (33.3 mm)	10,000 RPM

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