Beryl wrote:

Christopher Tidy wrote:
You know when you want to extract a short, unbroken stud from a casting
without damaging it, but it's stuck tight? Well I never found a good
way. But I had an idea this afternoon. I took a hex nut, cut a radial
slit through the nut, screwed it onto the stud, and squeezed it tight in
a mole wrench (i.e., vise grips). So it worked a bit like a collet. It
turned the stud out easily. Here's a pictu
http://www.mythic-beasts.com/~cdt22/stud_extractor.jpg

Positioning the vise-grip jaws one facet to the left would let the
"leading edge" of the nut (that follows the cut) dig in for a better bite.

The vise grip slipping on the flats of the nut are going to be the
limiting factor in the amount of torque you can deliver to the stud.

-jim