Bearing Faults

Bearing Faults

Causes

• Overload, inappropriate mechanical loads
• Wrong emplacement
• Material fatigue
• Bad/improper lubrication
• Environmental pollution/contamination
• Bearing currents
• Shaft currents
• Heat

Effects

• Noise
• Vibration
• Eccentricity
• Internal stress
• Bearing current

Bearing Current

Causes

• Shaft voltages create electrical bearing damage when they discharge through the bearings in a tiny but destructive electrical arc.

Effects

• Fluting (when low voltage, constant speed)
• Frosting (varying speed)
• Pitting (high voltage, low speed)

References

• kudelinaMainFaultsDiagnostic2020
• (benbouzidSignalProcessingFault2020, link, DOI)