EX40 Excavator Bottom Roller Track Roller For Hitachi The function of the roller is to transfer the weight of the locomotive group to the ground and roll it on the track. To prevent derailment, the roller should also be able to prevent the track from moving laterally relative to it. rollers often work in mud and sand, and withstand strong impacts, the working conditions are extremely harsh, and the rim is easy to wear. the requirements for the roller are: the rim is wear-resistant, the bearing seal is reliable, and the rolling resistance is small.
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