Improper operation or damage the outer ring of the bearing seat or wheels to make the base of the outer ring burrs or bumps. In the process of using a tool inadvertently installed within the bearing seat surface chisel injury, chisel ditch near the region will rise. If these bumps failed to re-install the bearing outer ring before tie or polished, the bumps affect the inner surface of the outer ring via the outer ring, so that the corresponding convex spots. When rolling elements impact these raised areas, increased stress, leading to premature bearing fatigue.
1, since the bearing seat wear, resulting in the bearing during operation with loose, resulting in wear. As a result, self-aligning roller bearings outer ring metal tear, wear.
2, with improper typical fretting corrosion. Bearing its base in the case of carrying the load relative displacement occurs, resulting in the generation of wear and corrosion.
3, the scars on the outer ring Cylindrical bump caused by the bearing housing. In addition, out of the loop round scars corresponding outer ring raceway spalling occurred here.
4, due to the cusp of split bearing housing stress concentration caused by the outer ring raceway local flaking.


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