What caused the fracture of the bearing ring?

The fracture of crossed roller bearing ring is a typical bearing failure mode in bearing failure analysis. According to some typical modes of bearing failure analysis, it mainly includes fatigue, wear, corrosion, electric corrosion, fracture, and plastic deformation.

Bearing fracture can include: due to external force; due to fatigue; due to heat caused by the bearing ring fracture.

When the bearing is stored, installed, used, disassembled, etc., the bearing ring is damaged by external force, which will cause the bearing ring to break. When the crossed roller bearing is in operation, if fatigue occurs locally, the edge of the fatigue part will have a stress concentration during the operation of the bearing, and the failure of the bearing ring will start to expand along this stress concentration point, and the bearing ring will break. Therefore, this type of fracture is caused by local fatigue.

Another common type of bearing ring fracture occurs when the temperature changes. If the bearing ring is locally heated, the bearing ring will locally expand, which will result in the fracture of the bearing ring. This is the thermal expansion and cracking caused by the local overheating.