... , Catepillar, Sumitomo, Kobelco etc.Guarantee2050 working hours Sprocket for Komatsu, Hitachi, Kato, Catepillar, Sumitomo, Kobelco etc.Guarantee2050 working hours ... top 11-13mm,bottom 4-6mm ProductSprocket ,sprocket wheel ,sprocket segmentModelKOMATSUPC60-7,PC130,PC200,PC300,PC360,PC400 ... R290,R305,R210.MaterialsSCSiMn2H,SCMn3B,50MnHardnessHRC45-52Depth of hardness4.5MM-5.5MMRemarksThe table is for ...