The track roller, which is also called bottom roller or lower roller, is one part of undercarriage parts for crawler heavy equipment such as excavator, bulldozer.

Excavator track roller is made of shell, bronze bushing, collar, seal, lock pin, plug, shaft. It is made by forging, machining, heat treatment, assembly, painting etc.

The quality and working life depends on the quality of raw steels, the hardness of rail surface, the depth of hardness layer, the quality of seal group etc.