Slewing bearing is a comprehensive load to bear large bearing, can also bear the larger axial and radial load and overturning. Slewing ring bearing general installed with a hole in the gears and gear lubricants hole and sealing devices, which can make the mainframe design compact structure, and guide is simple, easy to maintain. Wheel bearings for using an outside and inside, using an analysis of the four contact ball bearing, double row Angle contact ball bearing crossed cylindrical roller bearing, crossed tapered roller bearing and three rows of composite cylindrical roller bearing four series, including four contact ball bearing has high static load ability, crossed cylindrical roller has taught high dynamic load ability, crossed tapered roller bearing preloaded can make the bearing has the support of large rigid and rotation accuracy, three rows of cylindrical roller bearing of carrying capacity of combination due to improve to bearing height, all sorts of power by different groove bear respectively, so the same force, its bearing diameter can be considerably reduced and thus make host more compact characteristic is a kind of high bearing capacity of wheel bearing.
