Undercarriage parts for excavator and bulldozer Mainly 20 tons, 30 tons, 40 tons Pc200, pc300, pc400 etc Ex200, ex300, ex400 etc Cat320, cat325, cat330 etc Track roller Material:50mn Hardness:hrc55-60 Hardness depth:5-6mm Carrier roller Material:50mn Hardness:hrc55-58 Hardness depth:5-6mm Idler assy Material:zg40mn Hardness:hrc55-58 Hardness depth:5-6mm Sprocket Material:zg40mn Hardness:hrc50-56 Hardness depth:2.5-5mm Material:40mn2 Pitch:101, 135, 154, 171, 175, 190, 203, 216, 228.
