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At present, in engineering practice, people mainly choose to use deep groove radial ball bearings and tapered roller bearings. Tapered roller bearings are generally used in harsh working environments.

This is currently the most widely used model in coal mines underground, mainly used in horizontal or inclined situations less than 18 degrees. Due to the limitations of the strength of the conveyor belt and components, the length of a single machine cannot be too long.

Although the structure of the roller is relatively simple, the roller designed at present does not meet the standard requirements stipulated by the state, and the indicators considered in the design are insufficient, such as the running resistance coefficient is rarely considered.