Special Overrunning ClutchSpecial overrunning clutches are mainly applied in the shift of speed,Website:://.zys-bearing.com, the preventing of the reverse rotation and the intermittent motion. The operational principle is to use the friction produced by the pressing devices, such as wedge (or roller) and spring, to transmit the torque. It has a small size and a large torque. It is stable and noiseless when working. The engagement can be done at a high slip.The special overrunning clutches of our company are mainly used in the engine, decelerator and actuating device of the aero plane, and the transmission system of the helicopter. The normal rotating speed is 30,000r/m, and 40,000r/m in special situation.