An SEM Analysis of Bearing Failure Due to Electrical Arcing (Analyse par Microscopie Electronique a Balayage de l'Endommagement d'un Roulement a Billes a la Suite de Decharges Electriques Internes).
NATIONAL AERONAUTICAL ESTABLISHMENT OTTAWA (ONTARIO)
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Failure of a cam clutch after some 2,000 hours of operation was found to be due to bearing failure. When examined in the scanning electron microscope, evidence of molten metal in the form of craters or pools, and of minute globules of metal was found on the balls and races of the bearings. This suggested that electrical arcing between the balls and the races had occurred, and this was considered to be the primary cause of subsequent fatigue and other mechanical damage to these components.
- Machinery and Tools