newshound wrote:
I wouldn't grind on a wheel at all, I would start with the nearest oversize
jewellers' screwdriver and grind by hand on a normal "chisel sharpening"
stone. (On the edge, if it is a good one, to avoid making a hollow). Or
these days on one of those diamond plates.

If the hole is at least 5 mm across, this will possibly do:
https://www.watchtool.co.uk/bergeon-...es-p-6682.html

Does anyone know the difference between the India and Arkansas grinding
stones which are offered with them?

Best wishes,

Chris