Installation of roller are generally grouped in the pipeline, can be simply divided into two general special rollers and roller bearing. Ordinary roller bearing can be divided into upper and lower branches of the branch, and their main function is to support the conveyor and materials. Idlers can be made on a single idler roller and flat-shaped two, three grooved rollers idlers. Intermediate level trough idler roller group arranged side roller groove angle is generally 35 º and 45 º.
The rollers can be divided into a dedicated buffer roller, roller several anti-deviation:
    Buffer roller
Buffer roller conveyor mounted in place to protect the conveyor belt by the material. Each roller is made of an elastic buffer roller disc is made with a certain gap. Rated load buffer roller and standard idlers same. Under heavy and bulk materials transport situation, and sometimes need to set along the line of the buffer conveyor idlers. Buffer roller group usually composed by 3-5 idlers. To improve the cushioning effect, has developed a variety of buffer roller set.
May be due to bias the conveyor belt manufacturing, materials eccentric accumulation conveyor runs, rack deformation, roller bearing defects, wind loads and uneven distribution of the conveyor belt tension, causing the conveyor belt deviation. To prevent deviation to use more self-aligning roller group. Common aligning roller bracket a support group of idlers, the bracket can be rotated by a pivot mounted on the frame, when the conveyor belt deviation, can make the installation of the bracket relative to the conveyor idlers centerline of the machine is deflected to the passage of the belt conveyor to the center line. Spherical roller group set up on the side of the multi-roll, although you can play the role of forcibly correction, but because the edge of the vertical roll and continuous contact with the conveyor belt, belt edge wear will increase, reducing the service life of the conveyor belt.
Let the heart can also be used idlers are tapered roller side or both sides of the roller set forward form. When the two rollers of the roller group, the above method can also be used to correct running of the conveyor belt.