... offered Material : 50Mn , 42CrMo Focus on Customers Excavator part slewing ring Kato , Komatsu , Hitachi Excavator part slewing ringCaterpillar : CAT320B CAT320C CATE200B CAT320 ... ,LG6T,LG7T,LG20T,R55-7,R60-7,R210-5,R190-5,R200-5,R220-5,R205-7,R215-7,R220-7,R225-7,R290 ... -2,PC40,DH55-7,DH220-3,DH220-7,DH220-5,DH320,DH10L,DH300-5,DH280,DH290 Kato , Komatsu , Hitachi Excavator part slewing ring