- Ordinary rollers drive the roller tube, bearing seat, outer ring of bearings, and seal ring to rotate through the friction between the conveyor belt and the roller, and realize the logistics transmission together with the conveyor belt.Maintenance and maintenance of ordinary rollers:1. The normal service life of the roller is more than 20000h, and generally does not need maintenance. However, according to the place of use and the size of the load, a corresponding maintenance date should be established, timely cleaning and oil injection maintenance, and timely cleaning of floating coal. The rollers with abnormal noise and non-rotating should be replaced in time.2. When changing the bearing, make the bearing cage open outwards. After the bearing is installed into the idler, the proper clearance should be maintained and not crushed.3. The labyrinth seals should be made of original parts, and should be put into the rollers during assembly, and should not be assembled together.4. During use, the roller should be strictly prevented from hitting the roller tube by heavy objects.5. For the sealing performance and use performance of the roller, it is forbidden to disassemble the roller at will.