FRETTING DAMAGE DUE TO VIBRATION
The damage illustrated is fretting damage in the bore as distinct from fretting damage elsewhere. Bearing operating surfaces may suffer fretting damage while the shaft is at rest due to vibrations transmitted to the machine from external sources, etc.
Fig. 38 - Surface damage caused by external vibration while journal was not rotating.
Eliminate transmission of vibration from external sources if feasible by spring or rubber -mounting affected machine. If damage occurs in transit, clamp journal to prevent vibration during shipment, or fit dummy wooden bearings during transportation.
|Scoring Due to Foreign Matter or "Dirt"
|Damage Caused by Faulty Assembly
|Black Scab / Wire Wool Damage
|Pitting Due to Electrical Discharge
|Wiping of Bearing Surfaces
|Fretting Damage from Vibration
|Damage Due to Oveheating
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