Shaft Collars

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2012 Shaft Collar Stock List

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Shaft Couplings

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Product Tables

Shaft Collars
Shaft Couplings
Flexible Beam


Fastening Hardware
Stick Slip
Torque Charts (Metal)
Torque Charts (Plastic)
Wrench Sizes
REACH Compliance
RoHS Compliance


Avoiding Coupling Failure
Getting a Hold on Shaft Collars
Rigid Collars for Motion Control
Shaft Couplings

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Ruland Website
CAD Drawings

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Disc Couplings

Ruland disc couplings are an assembly of two anodized aluminum hubs and multiple thin, flat stainless steel disc springs.

Single and double disc styles are available with bore sizes ranging from 1/8” to 1 1/4” in the inch series and 3mm to 30mm in the metric series. The double disc styles include a center spacer offered in either anodized aluminum or insulating acetal for electrical isolation.

The discs between the hubs allow for a substantial amount of angular and parallel misalignment between shafts, while remaining rigid under high torque loads. Disc couplings are high performance motion control couplings ideal for high speed applications of up to 10,000 rpm. 

All disc couplings now feature a black anodized finish.


• High torque
• Balanced for high RPM
• Low Inertia
• No maintenance
• High torsional stiffness
• Constant velocity
• Long life
• Zero backlash

Product Specifications (Click a row for detailed specifications)

Product Range
DCS (Clamp) and DSS (Set Screw) Series
Single Disc Coupling - Inch
MDCS (Clamp) and MDSS (Set Screw) Series
Single Disc Coupling - Metric
DCD (Clamp) and DSD (Set Screw) Series
Double Disc Coupling - Inch
MDCD (Clamp) and MDSD (Set Screw) Series
Double Disc Coupling - Metric
MDCDE (Clamp) and MDSDE (Set Screw) Series
Double Disc Coupling - Electrically Isolating - Metric
Disc Couplings
Technical Information and Part Nomenclature

For additional information on shaft couplings, please see the following technical article entitled "What to Look For in Shaft Couplings" made available on the RotoPrecision website courtesy of Ruland.

For additional technical product and ordering information,
please contact Application Support.


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