The function of the idler roller is to support the conveyor belt and the weight of the material. The roller must be flexible and reliable. Reducing the friction between the belt and the idler plays a key role in the life of the belt, which accounts for more than 25% of the total conveyor cost. Although the idler is a small component in a belt conveyor and the structure is not complicated, it is not an easy task to manufacture a high-quality idler.
There are several criteria for judging the quality of the roller: radial runout of the roller, flexibility of the roller, and axial channeling momentum.
