How does a slewing bearing work？

A slewing bearing is a large-sized bearing that consists of an inner and outer ring. The outer ring is mounted to the machine’s structure, while the inner ring is attached to the rotating component. The bearing has a set of gears on its outer ring that mesh with a smaller set of gears on the inner ring, enabling the rotational motion of the component. The slewing bearing also has mounting holes that allow it to be bolted into place. In heavy construction equipment, the slewing bearing is a vital component of the excavator’s slewing system, serving as a transmission element that enables the machine’s movement. Slewing bearings are used across many industries and machines for both radial and axial motion.