Sprocket for Komatsu, Hitachi, Kato, Catepillar, Sumitomo, Kobelco etc.Guarantee2050 working hours Sprocket for Komatsu, Hitachi, Kato, Catepillar, Sumitomo, Kobelco etc.Guarantee2050 working hours.Certificate:ISO9001, Japan KCXMaterial:45Mn SCSiMn2H,SCMn3B,50Mn surface quenching:HRC 47-52 hardening depth:top 11-13mm,bottom 4-6mm ProductSprocket ,sprocket wheel ,sprocket segmentModelKOMATSUPC60-7 ...