Excavator parts EX40-2 Track roller

The Hitachi track roller EX40-2 is an undercarriage accessory specially adapted to the Hitachi EX40-2 model excavator. Its main function is to support the weight of the excavator’s body, enabling the excavator to travel smoothly in various terrain conditions. The wheel body material is generally 50Mn, 40Mn2, etc. After forging, machining and heat treatment, the hardness of the wheel surface quenching needs to reach HRC45~52 to ensure good abrasion resistance and load bearing capacity.