Roller works: roller driven by friction between the belt and the idler roller tube, the bearing and the bearing outer ring, ring rotary motion supply polyethylene polymer rollers, conveyor belt and with its It is implemented with transmission stream. Roller factors: roller radial runout (the indicators directly affect the stability of the material transport). Roller repair: repair roller mainly for tube wear small, rotation is not flexible for disassembly, cleaning, inspection, replacement, assembly, generally should replace the bearings and seals. Demolition should be from outside to inside in accordance with the order by piece. Repaired roller should meet the requirements.