Roller bearing is an important component of their choice whether it is appropriate Handan roller, quality of the merits, the relationship between roller life. In the tape machine operation, high rotational speed of roller, roller type, the main radial force, but at the same time bear a certain amount of axial force. Based on the above characteristics and roller cost, actual production is generally deep groove ball bearings. Roller Maintenance: When replacing bearings, bearing cage must open outward, bearing into the roller, the roller prices, should maintain proper clearance, Cisu idler shall not crushed. Seals should be used original parts, the assembly should be loaded into the roller respectively, may not cover the assembly together. Use the roller, it should prevent heavy blow smashed roller tube.