Long-life roller holding bearing

The invention belongs to the field of mechanical parts and discloses a roller bearing composed of an outer ring, an inner ring and rolling bodies. The middle of the inner axis face of the outer ring is provided with an outer ring inside race groove. The two sides of the inner axis face of the outer ring are provided with outer ring outer end cover grooves. The middle of the outer axis face of the inner ring is provided with an inner ring inside race groove. The two sides of the outer axis face of the inner ring are provided with inner ring outer end cover grooves. The rolling bodies are composed of rolling inner inside races, long rollers, short rollers and rolling outer end covers in a matched installation mode. The rolling bodies are installed between the outer ring and the inner ring in a matched mode. The rolling inner inside races are installed between the outer ring inside race groove and the inner ring inside race groove. The rolling outer end covers are installed between the outer ring outer end cover grooves and the inner ring outer end cover grooves. The roller bearing has the beneficial effects that a holder is not arranged; sliding friction between the rolling bodies is turned into rolling friction, so that frictional force is greatly reduced, the loss of the bearing is reduced, and the endurance limit and the service life of the bearing are improved. The roller bearing can work under the circumstance without lubrication. Under the same conditions, the roller bearing is far superior to an existing roller bearing in limit rotation speed and service life.