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Slewing bearing, we can also call it: slewing ring bearing or turntable bearing. Slewing bearing is a large-size bearing that can accommodate the radial load and axial load at the same time and still can accommodate the overturning moment. In general, slewing bearing have the installation holes, internal gear, external gear, lubricating holes and containment structure, so this make the bearing have some characters: compact structure, easy guide and maintain. The main series of slewing bearing: Three rows combined rollers slewing bearing Double-row angular contact ball slewing bearing Single row cross roller slewing bearing Single row four-point contact ball slewing bearing