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This was the company that did a couple of crown races for me https://www.universalgrinding.co.uk
I had to continually chase for months both times, although to be fair the second time there was some sort of global health pandemic going on. Like I said, I think it was just a small annoying job amongst other stuff. They did a really good job though. As far as I know ‘hard chroming’ (which they offer) would give you a good bearing surface after grinding.
How deep does the case hardening go?
I think it’s pretty shallow, I can see why pressed in cups need to remain ductile.
Would it not be possible to re-case harden after grinding the races?
I’ve got a Magistroni fork crown race that could do with a bit of love.
🙂