Generally, bearing cages will not be damaged under reasonable operating conditions. However, incorrect operation in daily production can reduce the service life of bearing cages. Below, we examine the causes that lead to bearing cage breakage: 1. Poor bearing lubrication: When bearings operate in a state of insufficient lubrication, adhesive wear is easily formed, deteriorating the working surface condition. The tearing material generated by adhesive wear can easily enter the cage, causing abnormal loads and potentially leading to cage breakage. 2. Bearing creep: Creep mainly refers to the sliding phenomenon of the bearing rings. When the interference fit is insufficient, the load point moves outwards due to sliding, causing the rings to deviate circumferentially from the shaft or housing. 3. Abnormal loads on the bearing cage: Improper installation, tilting, or excessive interference fit can reduce clearance, increase friction and heat generation, soften the surface, and cause premature abnormal spalling. As spalling expands, foreign matter enters the cage pockets, causing cage operation to be hindered and generating additional loads, further accelerating cage wear. This vicious cycle can eventually lead to cage breakage. 4. Material defects in the bearing cage, such as cracks, large foreign metal inclusions, shrinkage cavities, bubbles, and riveting defects such as missing pins, shims, or gaps at the mating surfaces of the two halves of the cage, as well as severe riveting damage, can all cause cage breakage. 5. Intrusion of hard foreign objects into the bearing: The intrusion of hard foreign objects or other impurities accelerates the wear of the cage.