1.freewheel sprocket 2.Certificate ISO9001.2008, 3.Material: Bearing steel, 4. ... and type Sprag Clutch BearingsSprag Clutch is a one-way freewheel clutch. It resembles a roller bearing, but instead of cylindrical ... , Starters, Primary drive, Conveyors, Overrunning, Indexing, Backstopping, Hoist load brake. High quality freewheel sprocket of sprag ...