Potential Bearing Problems With VFDs

[Dr Stan]

When I was in the Navy one of the issues related to motor and pump shafts was called high frequency fretting. It looked a lot like oxidation on the bearing surface and when we would repair them with electroplating we would do a final flash of tin to fill in the microscopic hills and valleys of the bearing surface and the inside of the bearing race when they were assembled. Now I wonder if you haven't identified the true culprit.