The guide wheel is an indispensable part in the walking system of large construction machinery such as excavator. It sits on top of the track and its main task is to guide the track to wind correctly. In addition, it also adjusts the tensioning degree of the track through the tensioning device, which acts as both a guiding function and a tensioning wheel. -- Excavator guide wheel

The support wheel and chain rail of the track car are the key components of the track car, and their functions are as follows: Support wheel :-- chain rail