Introduction:

A bearing that had been in service for a year and a half was sent to undergo failure analysis (Figure 1). This bearing had been installed in the drive centrifugal pump in the R-8 plant.

Figure 1. Photograph of bearing setup
Figure 2. Photograph of inner ring showing spalling in groove
Figure 3. SEM photograph of spalling, flaking and cracking, in the groove. 200X

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