There are various classification methods for rollers, mainly including: (1) According to product type, there are strip roll, section roll, wire roll, etc.(2) According to the position of the roll in the rolling mill series, there are blank roll, rough roll, finishing roll, etc.;(3) According to the roll function, there are scale-breaking roller, perforating roller, leveling roller, etc.;(4) According to the roll material is divided into steel roll, cast iron roll, carbide roll, ceramic roll, etc.;(5) According to the manufacturing method, it can be divided into casting roll, forging roll, surfacing roll, sleeve roll, etc.;(6) According to the state of rolled steel, there are hot roll, cold roll.The various classifications may be combined to give a more specific meaning to the roll, such as the centrifugal cast high chromium cast iron working roll for hot rolled strip steel.