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Plain Bearing Failure
5.0 Fretting
| Click on photograph to enlarge | |
 | Thrust bearing pad (back side) with fretted pivot bar resulting from axial rotor vibration (Photograph: Glacier Metal Co.) |
| Main Characteristics | With steel contacts fretting produces a characteristic reddish-brown stain at the point of contact |
| Cause | This has been brought about by axial vibration which causes the pad to flutter with the resulting oscillating load. |
| Note | |
| Possible Confusion with Other Types of Damage | |
| Comment |