Self-lubricating bushings are also called oil-free bushings. They have good self-lubricating properties, can play an excellent role in wear resistance and avoid sintering. They are suitable for swinging motion, reciprocating motion, frequent start and stop motion and other sports occasions. They are used in places where oil cannot be supplied or oil pollution must be avoided. They can reduce the oil supply device, shorten the assembly time, prevent oil pollution and save maintenance costs, so as to reduce costs.