Slewing Ring BearingsSlewing ring bearings, or turntable bearings, are ball or roller style bearings composed of two concentric rings either of which may include a gear. This type Slewing bearings | SKFSlewing bearings comprise an inner ring and an outer ring, one of which usually incorporates a gear. Together with attachment holes in both rings, 
Slewing ring bearings, turntable bearings | Kaydon BearingsHS series pre-engineered, light profile slewing rings feature rectangular cross sections, which allow for alternate hole patterns, improved stiffness, and the Slewing Rings (Turntable Bearings) Components - SilverthinSlewing ring bearings are comprised of two rings, each of which contains a precision raceway that is induction hardened on the surface to a specified depth.