The role of the roller is to support the weight of the conveyor belt and the material. The running roller is flexible and reliable. Reducing the friction between the conveyor belt and the rollers plays a key role in the life of the conveyor belt, which accounts for more than 25% of the total cost of the conveyor. Although the roller is a small part in the belt conveyor and the structure is not complicated, it is not easy to manufacture the roller.

There are several criteria for judging the quality of the idler: the amount of radial runout of the idler; the flexibility of the idler; the amount of axial movement.

Buffer roller performance and advantages: special polymer material for roller body, its mechanical properties are similar to bronze, it has good properties, and has good self-lubricating properties, and does not hurt the belt.

The buffer roller has superior anti-corrosion performance. The roller body and the seal are made of polymer materials. Used in corrosive occasions, the service life can reach more than 5 times that of ordinary rollers.

The buffer roller is light in weight and has low rotational inertia. The special polymer material for rollers is light in weight, and its specific gravity is one-seventh of steel. The rollers made of this material are about one-half of the weight of ordinary rollers and have low rotational inertia.

The roller is an important part of the belt conveyor, with many types and large quantities. It accounts for 35% of the total cost of a belt conveyor, and bears more than 70% of the resistance, so the quality of the roller is particularly important.