We're a motor repair shop. When we disassemble a motor, we take off the bearings and inspect them for damage. This helps to determine the failure mode and mitigate the issue so it won't fail again.
Both raceways were smooth, as well as the inner race ID surface. No other damage on the bearing except for the OD surface. It is driven by a VFD, but there’s no frosting or fluting on either raceways or bearing balls, so I don’t believe it to be shaft currents.
Anyone seen this on one of their motors? This is on the OD surface of the outer race. Identical markings are on the bearing housing. The splotched are textured, it kind of looks like spalling, but there are no other indications of relative motion between the bearing and the housing. The housing...
