Impact roller for belt conveyor flexibility: In the belt conveyor during operation, flexible idlers is very important, if not the roller flexibility, rotational resistance coefficient, the entire belt conveyor system circumstances have to pay a higher power supply polyethylene roller, consume more electricity polyethylene roller factories, sometimes resulting in tear tape, the motor burned polyethylene roller manufacturers, more In severe cases it can cause a fire. Therefore, the choice of a low rotational resistance coefficient (preferably less than 0.020) idler is an important part of belt conveyor design and selection. Roller works: roller driven by friction between the belt and the idler roller tube, the bearing and the bearing outer ring, ring rotary motion, and the conveyor belt and to achieve together with its transport logistics. Roller factors: roller radial runout (the indicators directly affect the stability of the material transport).