Factory supply EC300DL excavator slewing bearing size Material:42CrMo/50Mn Hardness:55~62HRC Outer ring diameter:1532mm Inner ring diamter:1235mm Total height:122mm Teeth no.:90 weight:400kgs Warranty:1 year Application: volvo excavator More types volvo excavator slewing bearing we manufacture: EC55, EC210, EC210B, EC240, EC290, EC360, EC460. if you have needs of excavator slewing bearing, please contact us freely.