Analysis of the damage to imported bearings reveals the following structural issues:

1. Seal failure. Particularly concerning is the requirement for certain shaft ends to be immersed in lubricant. When the lubricant's pH falls below 6, the bearings corrode rapidly, preventing normal ball rotation. This ultimately causes the imported bearings to seize due to rust, dislodging the inner and outer rings. In severe cases, the entire rubber body and mandrel become scrap.

2. Axial force issues in imported bearings. Beyond corrosion damage from lubricant ingress, bearings may experience ‘disintegration’, where balls scatter from the cage onto the cylinder surface, causing severe damage to printing cylinders, rubber blankets, and inks.

Common solutions include: modifying the rubber body to incorporate reliable sealing structures that prevent lubricant ingress into the bearings. Adjusting the imported bearings to ensure correct clearance and axial force settings, thereby avoiding mechanical damage caused by bearing looseness.