I have been able to remove a few by welding a nut to the broken
tap. Fluxcore mig worked for me.

(top posted for your convenience)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Keep the whole world singing . . . .
DanG (remove the sevens)




"David Todtman" wrote in message
news:AOg9f.361787$1i.338638@pd7tw2no...
I broke a tap today. There was not enough protruding for me to
get a grip and twist it out. I thought I would anneal the tap in
situ and drill it out. So I heated it red hot with my TIG torch
and let it air cool.

When I tried to drill, I found it was still way hard and I
abandoned the idea of drilling out the broken tap. I had the
flexability to drill and tap beside the original hole so there
was really no great loss. But, what if I really needed that
particular spot?

Would I have had better luck drilling had I cooled the part more
slowly (e.g., buried the part in a bucket of ash)?

Is my thinking nuts or is this a way to get at an offending
broken tap?

TIA,
David Todtman