1, bearing rings, torsion any one on the broken;
2, the bearing inner diameter or outer diameter of the outer ring surface has significant creep;
3, bearing the inner ring, outer ring, tumbling body, any one of the cage on the crack or gap;
4, bearing the raceway surface, rolling on the rust, there are injuries;
5, the bearing raceway surface, tumbling body with severe indentation and marks;
6, bearing the raceway surface, ribs, tumbling on a significant card injury;
7, due to heat and the formation of significant discoloration;
8, bearing the cage wear significantly, perhaps rivets significantly relaxed.
