Formsprag Clutch, Warren, MI, offers the world’s most advanced sprag clutch and sprag assembly technology used in drive trains of the aerospace industry. While Formsprag has been engineering and building sprag assemblies for more than 50 years, each sprag clutch or assembly is custom-designed and custom-built for its specific application.

On helicopters, Formsprag clutches are used to provide autorotation that is essential to allow safe landing in emergency situations. They are also used in the driveline gearboxes of multi-engine helicopters to allow twinning of the engines, among other functions. Read Article