Looking for something more specific?


Page Thumb Rigid Couplings ISC CompaniesRigid Shaft Couplings

ISC Companies and affiliate Adams-ISC are distributors of mechanical power transmission parts including rigid shaft couplings. For more information about the brands we offer and/or pricing, please contact us by phone 763-559-0033, by email [email protected], or by filling out our online contact form.

Rigid couplings, the simplest type of couplings, are used to connect two shafts that are precisely aligned. They provide a fixed connection between two shafts where torsional flexibility is not required, shaft alignment is maintained, and bearing support is provided. Any amount of shaft misalignment can cause excessive wear or failure of the shaft, coupling, or bearing.

Shaft support bearings should be located close to the coupling to reduce shaft deflection (the degree to which a structural element moves under a load). To reduce vibration, balancing may be required for large couplings or those running at high speeds.

Types of Rigid Shaft Couplings


Designed for heavy loads and used to connect shafts of the same or different diameters. They have two flanged hubs that are bored and keyed to fit the shaft and are bolted together. Some have removable bushings for easy replacement. They are easy to install, remove, and require little maintenance.

Sleeve / Muff

Made from one piece of material that is factory-bored to work with a standard-sized shaft. Keyways are broached and set screws are installed. Shaft keys transmit torque from the shaft to the coupling hub and set screws keep the coupling from sliding along the shaft.

Ribbed / Clamped

Designed for heavy-duty applications, made in two pieces, and used to connect shafts of the same diameter. The two halves clamp on the shaft and held together by bolts. The coupling is keyed to both shafts.

Top Brands We Offer

Boston Gear_Altra Brand Logo

Browning_Regal Brand Logo

Climax Metal Products Brand Logo


Dodge RBC Brand Logo

Lovejoy_Timken Brand Logo

Martin Brand Logo

Ruland Brand Logo

Stafford Brand Logo

Zero-Max Brand Logo

PTDA-Handbook-CoverContent on this page was created using excerpts from the Power Transmission Handbook (5th Edition), which is written and sold by the Power Transmission Distributor’s Association (PTDA).

Order Your Copy Here

Looking to place
an order?

ISC Companies and affiliate Adams-ISC are industrial distributors of bearings and mechanical power transmission parts. We have many different models and brands in stock for fast delivery. Our sales professionals are happy to assist you in the selection process to ensure the correct part is specified for your application. Get a quote by clicking below on “Request Pricing” and filling out the contact form or give us a call at 1-800-627-9434.

Request Pricing