50Mn 40Mn Track Roller Excavator Undercarriage Parts Ex55 Bottom Lower Roller

China Factory Drectly Provide Track Roller Excavator Track Bottom Lower Roller

Function: The roller is fixed under the wheel frame with screws to support the mass of the machine and distribute the Mass distribution on the track shoe. At the same time, it also relies on its roller flange to grip the chain rail and prevent the track from slipping laterally (derailing), ensuring that the mechanical movement along the track direction has small rolling resistance and the lifespan of the supporting wheels during muddy and underwater operations. According to the structure, the supporting wheels can be divided into single side supporting wheels and double side supporting wheels. The two types of supporting wheel rims, sliding bearing and rolling bearing, are both quenched and have a hardness of 355-440 HB. In the platform frame, especially when installing partitions to improve stiffness, some of the cavities formed are easily blocked by soil and hinder the rotation of the supporting wheels; When running on soaked soil, it is also easy to block the supporting wheels. Therefore, some tracked bulldozers are equipped with support wheel guards with reinforcing ribs on the outer side of the platform frame.