... Various size and type, Sprag Clutch BearingsSprag Clutch is a one-way freewheel clutch. It resembles a roller bearing, but instead ... friction. The sprags are spring-loaded so that they lock with very little backlash.Applications: Automatic transmissions, Helicopters, Motorcycle, Starters, ... Conveyors, Overrunning, Indexing, Backstopping, Hoist load brake. Sprag Clutch bearing one-way freewheel clutch