China factory supply CX290B excavator parts slewing bearing replacement 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):1600mm Inner ring diamter(ID):1500mm Total height(H):200mm Teeth no(Z).:92 Warranty:1 year Application: case excavator More types case excavator slewing bearing we manufacture: CX130, CX210, CX210B, CX240, CX240B, CX460. if you have needs of excavator slewing bearing, please contact us freely.