Profile: Xuzhou Xinda Slewing Bearing Co.,Ltd. is specializing in producing slewing rings, turntable bearings and slewing bearings. We are an ISO 9001:2000 certified company. Our products include single row ball structures, single row crossed roller structures, double row ball structures, three row roller structure, roller & ball combination structures, and light type profile structures. Our products are widely used in many fields, such as construction machinery like cranes, excavators, mining/heavy equipments & port/marine machinery, light industry like food machinery, packing machinery, metallurgical machinery & steel works equipment, sewage treatment plant, wind power fields, agricultural machinery and military products. Our contact ball slewing bearing is composed of two seat-rings. It is compact in design and light in weight. The balls are in contact with the circular raceway at four points, via which the axial force, radial force and resultant moment. It may be used for slewing conveyers, welding operating consoles, light & medium duty cranes, excavators and other engineering machines.