The Large Diameter Slewing Bearing Rings for a broad spectrum of applications. Chaudhry Hammer Works Ltd. Manufactures Large Diameter Slewing Bearing Rings. Chaudhry Hammer Works Ltd. Is an ISO 9001:2000, 14001:2004 and OHSAS 18001:2007 certified company. The size of bearings and slewing rings ranges from 500 mm to 4500 mm outside diameter. Slewing Bearing can support axial, radial and moment loads simultaneously. The Roller can be balls of cylindrical rollers. This type of bearing is used with slewing units of construction equipment such as power shovels and track cranes, loader and carrier equipment such as deck cranes, machine tools and parabolic antennas.