The main structure
The track roller is one of the four-wheel belts of the crawler-type construction machinery chassis. Its main function is to support the weight of the excavator and the bulldozer, so that the track moves along the wheels. Wheel body, roller shaft, shaft sleeve, sealing ring, end cover and other related components. Track rollers can be divided into unilateral track rollers and bilateral track rollers; track rollers for excavators and track rollers for bulldozers, track rollers for excavators are generally black painted, and track rollers for bulldozers are generally yellow paint.
Track roller material
The material of the roller body is generally 50Mn, 40Mn2, etc. The main process is casting or forging, machining, and then heat treatment. The hardness of the wheel surface after quenching should reach HRC4552 to increase the wear resistance of the wheel surface. The processing accuracy of the roller shaft is relatively high, and generally requires CNC machine tools to achieve the requirements. The material is mostly 40Mn2, and it should be quenched and heat treated after processing, and the hardness is about HRC42.