Why is it so damn hard to find an M4 tap that can tap all the way to the bottom of a blind hole? :(
@quixoticgeek I think I just found some by going over to the German side 😉
"Gewindebohrer Sackloch" might be the thing you're looking for?
They seem to have sharp conical tips so if you want your hole with a blunt end maybe that's the wrong thing.
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@twobiscuits i have taps from Germany and china. They all have a conical tip. Just a question of how long it is. But none of them get closer than 3mm to the bottom of the hole...
@quixoticgeek well the ones for "sackloch" at least don't have a tapered bit at the beginning of the thread cutter. Just a sharp point beyond it a bit like a normal drill bit. I guess you have to start the thread at the top of the hole with a normal one?