Centrifugally Lift Off Sprags Freewheels
The Centrifugally Lift Off Sprags Freewheel is a Freewheel with the inner race rotating, where only the inner race is designed for freewheeling.
Originally these Freewheels were designed as a backstop, but these Freewheels can be also used as an overrunning clutch in crawl drive applications, where the overrunning speed is high yet the driving speed is low.
The basic function, that separates this category of freewheel from the others is that it’s cam/sprag cage centrifugally disengages itself from the inner race and outer race. This results in there being no friction caused by the cam/sprag cage. It promotes longevity of the unit as well as little to no maintenance.