The freewheel sprag one way bearings is composed of stamping outer ring and plastic cage, which can have its own plastic reed or stainless steel reed guide needle roller. The bevel raceway and needle roller on the outer ring are used as locking device. The support bearings are mounted on both sides of the needle roller clutch and bear radial load. As the support bearings are needle roller and plastic cage assemblies. Because there is no inner ring, the shaft wear is greater, so it is best to use the shaft heat treatment.