> But until I see one after a few thousand hours in a high speed motor Add some load to that as well. It seems pretty unlikely any indentations will last very

> But until I see one after a few thousand hours in a high speed motor Add some load to that as well. It seems pretty unlikely any indentations will last very long under stress. I've replaced bearings on trailers and vehicles and they often have wear marks deeper than the indentations they showed in that video.