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The bolt type roller bearing is generally a fully loaded roller structure. The bolt shaft raceway is quenched. To avoid stress concentration, the outer surface of the thick wall outer ring of the roller is arc-shaped. The outer ring has two integral ribs, which are guided axially by rollers. The head of the bolt shaft and the side retaining ring pressed provide axial support for the outer ring through the roller. The bolt roller bearing is suitable for heavy radial load. Since the outer ring is axially guided by rollers, the bearing can also bear heavy axial load, allowing relatively high speed operation. However, since the roller is fully loaded, it is necessary to replenish the lubricating grease frequently. The lubricant can be added through the two ends of the spindle and the holes on the spindle body