Front idler for Caterpillar,Komatsu.Hitachi,etc. 1..Surface Hardness:HRC49~56 2.Depth:5~8 3.good ... group used for heavy construction machinery,such as caterpillar,komatsu,hitachi,daewoo,kobelco,sumitomo,hyundai,samsung,volvo,mitubishi. The hardness of ... 3PC150-3PC150-5PC220-3PC200-5PC210-5PC220-5PC240-6PC200-6PC200-7PC300-1/3PC250-5PC280-5PC340PC300-5/6PC350-6PC360-5 PC180PC240PC400PC400-5/ ...