Bearing Bore Distortion
Bearing bore distortion can be caused by excessive interference fit in a medium wall liner, or by entrapment of foreign matter between the bearing and housing during assembly.
Addressing the Damage
Fit new or relined bearings or pads. Investigate and, if necessary, correct the interference conditions and housing design.
Figure 1: Bearing bore deformed by entrapped swarf, resulting in flexure and fatigue damage
Figure 2: Back of bearing shown in Figure 1; “flat” on steel shell caused by swarf entrapped between shell and housing