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PLAIN BEARING FAILURE
8.0 Electrical damage
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8.1 Electrical Erosion Damage in Journal Bearing (1)
8.2 Electrical Erosion Damage in Journal Bearing (2)
8.3 Electrical Arcing Damage on Journal of Vertical Electric Motor
8.4 Electrostatic Erosion Damage on Journal Bearing
8.5 Electrostatic Erosion Damage on Thrust Pad
8.6 Electrical Damage: Summary
Both electromagnetic and electrostatic voltages generated on rotors can discharge through the thin oil films in bearings and cause electrical erosion damage. This produces a characteristic matt finish that is frequently replicated on the journal or thrust collar.