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 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 
iglide® PRT rotary joint & slewing ring bearing from igus®iglide® PRT slewing ring bearings are ready-to-install rotary joints for self-lubricating, dry operation. The design is based on maintenance-free sliding 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