Looking for something more specific?

Couplings & U-Joints

Know what you need? Browse our new eStore


Shaft Couplings Page Small ThumbCouplings & U-Joints

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


A shaft coupling is used to connect two shafts that turn in the same direction on the same centerline. The major types of shaft couplings are rigid, flexible, and U-joints (universal joints). Rigid couplings are used to connect shafts that are precisely aligned. Flexible couplings, which make up 90% of couplings sold, are designed to transmit torque while permitting some radial, axial, and angular misalignment. They can accommodate angular misalignment up to a few degrees and some parallel misalignment. U-Joints are used to connect shafts that intersect at angles greater than what a flexible coupling can handle.

Functions of Shaft Couplings

  • Connect or extend the driving or driven shafts
  • Manage misalignment between shafts
  • Transmit rotary power from one shaft to another
  • Protect expensive equipment
  • No efficiency loss
  • Cushion shock loads
  • Electrically insulate drive
  • Limit end float
  • Provide a place for clutching components
  • Provide torsional tuning by varying stiffness

Coupings Line CardView Couplings Line Card  |  View All Line Cards


Top Brands of Shaft Couplings & U-Joints We Offer

Atra-Flex Brand Logo

Boston Gear Brand Logo

Browning_Regal Brand Logo

Climax Metal Products Brand Logo

Dodge Brand Logo

Fenner Drives Brand Logo

Formsprag Clutch_Altra Brand Logo

G and G Manufacturing Brand Logo

Huco_Altra Brand Logo

IDC Select Brand Logo

Kop-Flex_Regal Brand Logo

Lovejoy_Timken Brand Logo

Martin Brand Logo

Maurey Manufacturing Brand Logo

Regal Beloit Brand Logo

Rexnord Power Transmission Brand Logo

Ringfeder Brand Logo

Ruland Brand Logo

SKF Brand Logo

Stafford Brand Logo

TB Woods_Altra Brand Logo

Timken Brand Logo

US Tsubaki 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