Altra Industrial Motion Corp.[1] is an American manufacturer of mechanical power transmission products – brakes, clutches, couplings, and the like.

While the products sound automotive to the layman, in fact most Altra products are used on industrial machinery, such as fail-safe brakes for elevators and forklifts, gearboxes on conveyors, heavy duty brakes on mining equipment, clutches for beverage capping equipment, etc.

Which, at the time, consisted of several brands, including Ameridrives, Boston Gear, Formsprag, Marland, Nuttall/Delroyd, Stieber, Warner Electric and Wichita Clutch.

Following the foundation, Altra has made several strategic acquisitions, including TB Wood's, Hay Hall (Bibby, Matrix, Twiflex, Huco, and Inertia Dynamics), Svendborg Brakes, Bauer Gear Motor, Guardian Couplings, Lamiflex Couplings, and Bear Linear (now Warner Linear), Kollmorgen Corp, Thomson Linear, Portescap, Jacobs Vehicle Systems.

In October 2022, Altra Industrial Motion agreed to be acquired by Regal Rexnord Corp. in a deal worth around $5 billion including debt.