Slewing bearing is a new type of mechanical parts, it is composed of inner and outer rings, rolling elements, etc. Slewing bearing also called slewing ring bearing, turntable bearing, slewing ring, is a large bearing that can withstand comprehensive loads, and can withstand large axial and radial loads and overturning moments at the same time.

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​Slewing bearings are widely used in actual industry and are known as "machine joints". Engineering machinery is the original application of slewing bearing, is also the most widely used place, such as earthmoving machinery, excavator, disintegrator, stacker reclaimer, grader, roller, dynamic compaction machine, rock drilling machinery, boring machine and so on. With the rapid development of machinery industry, widely used in Marine equipment, lifting machinery, light industrial machinery, metallurgical machinery, medical machinery, industrial machinery and other industries.

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​A slewing drive is a ready-to-use system component consisting of a ball or cylindrical roller slewing support that carries both axial and radial forces as well as the overturning moment of a hydraulic or electric drive in a fully enclosed housing.