The roller is one of the four wheels of the crawler type construction machinery chassis. Its main function is to support the weight of the excavator and bulldozer, so that the crawler moves along the wheel. Next, we will introduce the structure of bulldozer roller, hoping to help you better understand it.

The main structure of bulldozer roller is composed of wheel body, roller shaft, shaft sleeve, seal ring, end cover and other related parts. The roller can be divided into unilateral roller and bilateral roller; Rollers for excavators and bulldozers are generally painted black and yellow.

The materials of the bulldozer supporting wheel body are 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 HRC45~52 to increase the wear resistance of the wheel surface. The requirements for the processing accuracy of the roller shaft are relatively high, and generally it requires CNC machine tools to process to meet the requirements. The material is mainly 40Mn2, and quenching heat treatment is also required after processing, and the hardness reaches about HRC42.