... : 50Mn , 42CrMo Focus on Customers Excavator part slewing ring Kato , Komatsu , Hitachi Excavator part slewing ringCaterpillar : CAT320B CAT320C CATE200B ... 7,R220-7,R225-7,R290-7,R280,R300,Hitachi :EX60-1,EX60,EX60-5,EX100-1,EX120 ... 1,ZX200-5,ZX200-2,ZX200-3,ZX230,ZX240,EX300-1,EX3003,EX220-1,UH083,UH063,Komatsu : PC60 ... DH10L,DH300-5,DH280,DH290 Kato , Komatsu , Hitachi Excavator part slewing ring