Roll crusher is generally used as small crushing machine which can be used for crushing materials with medium hardness such as coal, building material and wear-resistant materials, and it has excellent crushing effect on building material and coal. This machine also can be called double roll crusher or teeth roll crusher. Roll crusher is commonly used in the cement, chemical industry, electricity, metallurgy, building materials, refractory material and other industries. Roller crusher mainly crushes materials with medium hardness such as chalk, slag, coke, coal and so on. The double roll crusher is composed by roller, roller supporting bearing, compacting device, adjusting device and the driving device.

Roll crusher can also be called roller crusher. It is composed of two rollers rotating with opposite direction. Materials go into the space between the two rollers from the upper part and then will be squeezed and crushed by the two rollers, and crushed materials will be discharged from the bottom of the machine. The space between the two crushing rollers can be flexibly adjusted to produce products with different fineness.

There are two cylindrical rollers horizontally installing on mutually parallel racks, where one of the roller bearing is movable and the other roller bearing is fixed. Driven by electric motor, the two rollers do opposite rotation, which produces downward acting force to crush materials between two crushing rollers; broken materials that are in line with the required size are pushed out by roller and discharged from the discharging port.