Overrunning Clutch The free-wheeling clutch also called unidirectional bearing ，is a kind of junction box which only can the sole direction conducts. The driving units conduct the driven units only from one way. When the direction changes, the driven units will automatically overrun without producing any forces. The PRS free-wheeling clutches products series including the following six series: CSK series sprag types overrunning clutch, B200 sprag types(without inner rim) overrunning clutch ,DC series sprag types (without outer rim ) overrunning clutch ,CKA series sprag type overrunning clutch ,CKZ series Sprag types overrunning clutch ,and ASNU series cam overrunning clutch .They are commonly used in packing machinery, printing mechanism, textile machinery, food machinery, plastic machinery, metallurgy ,cement, mine, petroleum, transport machinery and so on .We are also designing and developing kinds of overrunning clutch with specific structure according to customers’ requirement