Four-column roller bearing

The utility model belongs to the technical field of bearings, and relates to a four-column roller bearing, which is mainly used in the metallurgical industry as a rolling mill bearing. The roller bearing consists of an outer ring, an inner ring, a roller, a second roller, a retaining rack base, a retaining rack cover, a cotter pin and an outer retainer ring. The employment of the cotter pin, instead of a rivet or a screw, in the connection of the retaining rack base and the retaining rack cover has the effects of simplifying the assembly process, reducing the consumption of electricity during the welding process, and making the use of the bearing safer and more reliable.