RE: Broken stud extractor; now what?

[glen powell <gpowell@acacianet.com>]

That wuz me. Generally, the heat and vibration of drilling combined with
the reduced strength of the stud as you slowly drill it away with larger
and larger drill bits will loosen it up and the reverse-twist drilling will
help to back it out, not make it tighter as a right-hand twist drill will do.
So long as you don't go so big on the drill bit that you damage the
threads you have nothing to lose over a right-hand twist drill for getting
that easy-out in so that you can snap it off and then be in a real clustah......

-glen

>I've had one other person suggest the right-hand bits.  I guess I have
>to confess that I don't understand why it would make any difference
>which way the drill is rotating when you cut into the offending stud. 
>For how firmly the stud piece is in there, you're certainly not going to
>just rotate the broken stud out with the drill.