CKB type, i.e. foreign B-type 200 series, is a wedge type overrunning clutch without inner ring and bearing support. It is to install the shaft directly in the clutch. Therefore, the shaft used for clutch installation needs to be hardened after grinding * * * HRC58-62, and the taper of the shaft shall not exceed 0.01mm every 50mm. In order to ensure the concentricity of the shaft and the outer ring of the clutch and bear the radial or axial load of the outer ring and the shaft, bearings can be installed at both ends or one end of the clutch. It is applicable to the limit speed of 1000-2400r / min and the nominal torque of 60-1250n m。 It is commonly used in mechanical transmission of packaging machine, bag making machine, corrugated paper production line, reducer, elevator, electric roller and so on.