marcmorin
RIP 1953-2020
Table was new old stock. But an open box item. No divot when acquired. Only oil used was SAE 20 3-in-1 blue label. Tried a ceramic ball and noticed divot wear starting after very low hours (probably about 30 hours).
Doesn't Tungsten have a higher hardness than Ceramic?
Do we know what material the ball was that ROK used? I'm thinking that material is the safest bet as ROK vetted that material back in the day.
It's not necessarily the hardness, it's the interaction of the two surface structures. As i mentioned, ceramic and quite a few metals don't like being rubbed together. I would guess, the ball chosen was an M50 grade ball. Having said that, there are quite a few grades of tungsten carbide balls. If going that route, get the highest grade one you can.