I've just witnessed a ball bearing failure that I've never seen before. The ball elements failed (not either race). They appeared to crumble. They were split open in two or more pieces each with a brittle looking fracture surface. It was on every ball. This happened at very low life. It is a standard size ball bearing from a "non-elite" supplier. The pieces are out to a met lab to see if it was a material issue, but I am wondering if anyone has seen anything like this. I know there will be in interest in more application info and pictures, but I have to be careful in what I post, so I'm starting with the question of if anyone has seen anything like this and what was the root cause?
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