Taper sleeve is a new type of mechanical transmission connecting parts widely used in Europe and the United States. It is also called taper connecting sleeve, pulley taper sleeve, coupling taper sleeve, tightening sleeve, tightening taper sleeve, locking sleeve, locking sleeve. It has the characteristics of high standardization, high precision, compact structure and convenient installation and disassembly. Through the 8 degree outer conical surface and pulley, sprocket and other transmission parts of the inner conical surface compression connection, so that all kinds of transmission parts of the centering accuracy is greatly improved.