The manufacturer of cross roller cylindrical bearings stated that bearing ring fracture is a typical bearing failure mode in bearing failure analysis. According to some typical modes of bearing failure analysis, the failure analysis of bearings includes fatigue, wear, corrosion, electrical corrosion, fracture, and plastic deformation. The fracture of bearings belongs to one category. Generally speaking, these bearing failure modes cover the vast majority of bearing failures, but not 100%. In common bearing usage, there may also be some failure modes of bearings that are not within these classifications.

The basic failure modes of bearings are divided into different subcategories. In terms of bearing fracture, the manufacturer of cross roller cylindrical bearings stated that it can include bearing ring fracture caused by external forces, bearing ring fracture caused by fatigue, and bearing ring fracture caused by heating.

When bearings are stored, installed, used, disassembled, etc., the bearing ring is damaged by external forces, which can cause the bearing ring to break. The bearing ring fracture shown in the figure is caused by external force damage, resulting in complete bearing fracture.

The manufacturer of cross roller cylindrical bearings stated that when the bearing starts to experience fatigue locally during operation, the edge of the fatigue part will experience stress concentration during bearing operation, and failure will occur along this stress concentration point, leading to bearing ring fracture. Therefore, this type of fracture is caused by local fatigue. As shown in the figure, it belongs to the category of bearing fatigue fracture.

Another common type of bearing ring fracture in industrial robot bearings occurs during temperature changes. If the bearing ring is locally heated, the bearing ring will experience local expansion, and the resulting fracture of the bearing ring is thermal expansion cracking caused by excessive local temperature.