Analysis: Wear mostly occurs on the sliding friction surfaces of the roller end face and the rib face, the cage pocket and the cage and the ferrule guide surface. These phenomena are not directly related to material fatigue.

the reason:

Foreign matter intrusion, rust and electric corrosion.

Unsuitable or insufficient lubrication.

Slip caused by irregular movement of the rolling elements.

Precaution

Improve the sealing device.

Re-consideration of lubricants and lubrication methods.

Clean the bearing around the bearing.