... ISO and SGS Certificate Good reputation Material : 50Mn , 42CrMo Excavator Slewing Rings Bearing Volvo: EC210, EC210B, EC330B, EC360B, EC460BDeere ... , 370LC, 992D, 992E, 450LC, 450CHitachi: ZX160, ZX200, EX200-1, EX200-2, EX200-3, EX200-5, EX220-1, EX220-3, EX220-5, EX230-5, EX270 ... , PC300HD-6, PC300LC-6LC, PC300LC-7PC300LC-7EO, Excavator Slewing Rings Bearing , slew bearing for Cranes and Excavators