The slewing bearing is composed of inner and outer rings, rolling elements, etc. It is a large bearing that can bear comprehensive loads, and can bear large axial and radial loads and overturning moments at the same time. Slewing bearing, also known as slewing bearing, is widely used in real industry. It is an important transmission component necessary for machinery that needs to perform relative rotary motion between two objects and simultaneously bear axial force, radial force and tipping moment. With the rapid development of the machinery industry, slewing bearings have been widely used in marine equipment, construction machinery, light industrial machinery, metallurgical machinery, medical machinery, industrial machinery and other industries.