Bearings , ONLY Bearing is a Chinese bearing supplier specializing in the manufacturing and marketing of our own TGU Brand of Bearings worldwide. We are able to provide wide range of bearings used in many industries worldwide. The bore diameter for our TGU-Brand B, Single row ball slewing bearing is composed of internal and external seats and, The single row four point contact ball slewing bearing is composed of two seat rings, which design in compact structure and light weight, steel ball contact with the circular raceway at four point, it can bear the axial force, radial force and the tilting