Steel 20Y-25-21200 PC210-6 swivel ring swing bearing attachment for komatsu excavator Material:42CrMo/50Mn Structure:Internal gear four point contact slewing ball bearing Hardness:55~62HRC Inner and outer ring modulation hardness:229-269HB Operating temperature:-40â??-+150â?? Outer ring diameter(OD):1300mm Inner ring diamter(ID):1000mm Total height(H):100mm Teeth no(Z).:110 Warranty:1 year Application: komatsu excavator More types komatsu excavator slewing bearing we manufacture: PC30-2, PC50-7, PC55, PC60-5, PC60-6, PC60-7, PC70, PC75, PC78, PC100-3, PC120-3, PC128, PC120-6, PC120-6E, PC100-5, PC120-5, PC130-7, PC150-5, PC150-7, PC160-7, PC200-2, PC200-3, PC220-3, PC220-5, PC200-5, PC200-6, PC220-6, PC200-7, PC200-8, PC220-7, PC220-8, PC210-7, PC240-8, PC227, PC228, PC270-7, PC300-3, PC300-5, PC300-6, PC300-7, PC350-6, PC350-7, PC360-7, PC360-7, PC400-5, PC450-5, PC400-6, PC400-8, PC450-6, PC450-7, PC400-7, PC460-7. if you have needs of excavator slewing bearing, please contact us freely.