18 years ago
it's a 3/8 unc roll tap in a blind hole, it's in the length of the
the hole was a few thou undersize, i have done almost 250 holes
with it, all drilled the same size..
the casting is to valuble to waste so it has to come out.
I was going to heat teh broken bit with the tig to soften it, so
I can bore it.
I remeber someone saying about a home made discharge thing to remove
taps, how did it work?
any other suggestions?