Maintenance free bearings for bolt roller

The bolt roller bearing is generally a fully loaded roller structure, and the bolt shaft raceway is quenched. To avoid stress concentration, the outer surface of the thick walled outer ring of the roller is curved. The outer ring has two integral retaining edges, guided axially by rollers. The bolt shaft head and the pressed side retaining ring provide axial support for the outer ring through rollers.

Curved roller bearings are suitable for heavier radial loads. As the outer ring is axially guided by rollers, this bearing can also withstand heavier axial loads and allow for relatively high-speed operation. However, as it is a fully loaded roller, it is necessary to regularly replenish lubricating grease. Lubricant can be added through the two ends of the core shaft and the holes on the core shaft body.