Excavator Undercarriage Parts EX200 Track Roller For HITACHI?>
Product origin :Quanzhou Fujian China
Delivery time :30 days
Supply capacity :20000 pcs
The EX200 track track roller is one of the four wheels and one belt of the mechanical chassis. Its main function is to support the weight of the HITACHI excavator and let the track advance along the wheels.
The material of EX200 track roller is 50Mn high quality carbon structural steel, which has high strength and hardness, excellent hardenability, deep hardened layer, fine pearlite structure and good mechanical properties.
|Products Type||EX200 Track roller|
|Place of Production||Quanzhou Fujian China|
|Use||Excavator, Bulldozer, ect|
|Technology||Forging Casting/Smooth Finish|
|Color||Commonly use color, Customized|
1. The Idler body is a casting part, and the wheel body has durability and rust resistance after special heat treatment.
2. High hardness wear-resistant chrome aluminum alloy floating oil seal and elastic rubber O-ring.
3.The Idler with the hardness of the wheel body diameter and the design of the guide shaft , and the reasonable outer diamete to increases the wear life.
4. All of leading shaft, copper bushing and sealing parts are passed through the fully automatic production system, and the precision is controlled by the numerical control computer to ensure the accuracy of the shaft.
Technical requirements for rollers
Spindle: The material of the spindle is 50Mn high-quality carbon structural steel, the C content is 0.48% ~ 0.56%, the Si content is 0.17% ~ 0.37%, the Mn content is 0.7% ~ 1.0%, the S content is less than 0.035%, and the P content is less than 0.035. %, Cr content is less than 0.25%, Ni content is less than 0.30%, and Cu content is less than 0.25%.
Among them, Mn is an important element in alloy steel, which can improve the forgeability and plasticity of steel, and can ensure that the material has sufficient toughness and wear resistance. After heat treatment, 50Mn steel has higher strength and hardness, excellent hardenability, deeper hardened layer, finer pearlite structure, and better mechanical properties.
Wheel body: It is formed by forging method. After the forming, the wheel body blank is quenched and tempered, and the hardness reaches 26 ~ 32HRC to maintain high strength, plasticity, toughness and comprehensive mechanical properties inside the wheel body.
The surface of the wheel body is quenched to improve the hardness and wear resistance of the track surface of the roller. The quenching hardness is 50 ~58HRC, and the depth of the hardened layer is 6 ~ 12mm. In this way, the hardness of the track surface is basically close to the hardness of the chain link (48 ~ 58HRC).
Seal: The size and surface roughness of the O-ring ring groove must meet the design requirements, the mating surface should be chamfered, and burrs and sharp edges should be cleaned.
Floating seals and O-rings should be made of high-quality butadiene rubber. The inner diameter, wire diameter, elasticity, hardness (Shore), and surface finish should meet the standards. Before assembly, they should be inspected one by one according to the above items. Put into assembly.