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I believe it's gonna be a difference in cup and ball size. I bet if you look real close the ball is not fitting in the cup correctly, not enough contact area causing overheating because only a small area of contact. imo


And the only lub I would use at first start up is black moly lub.

Best to buy those 2 things from someone like Smith Brothers so you know what you have, size and harding. There are different ball and cup sizes.


this is my guess as well.

for what is the good life if not doing things thoughtfully?