Belt conveyor idler is a major part of the conveying belt. Adopting seamed precisely high-frequency welded tube, the product made in our company can adapt high-speed requirement. The bearing base is punching pressed with steel plate. With certain elasticity, it can prevent the supporting roller shaft from bending. Adoption of big bearing backlash makes the friction force reduced under normal speed. The special seal structure consists of way sealing and oil chamber. It can meet anti-dust, rail proof, heat and coldness resistance requirement. And lithium grease can meet the long service life requirement. In generally, belt conveyor idler meet the requirement of rotary resistance, radial jitter, small eccentric distance, well sealed, and good grease performance. Therefore, it has longer service life, which lasts more than 30,000 hours according to DIN standard (exclude buffer comb-like belt conveyor idler), and its spoilage is not bigger than 12%. The new type of fire resistance, anti-electrostatic plastic belt conveyor idler has great application effect with the features of lightness, high flexibility, high strength, anticorrosion, abrasion resistant and long service life. Its service life is 2-4 times of other rollers.