"Christopher Tidy"
wrote in message
...
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

No doubt some dude in Detroit had the same idea
about 80 years ago, but I was pleased with it
:-).

Chris

I've used this same trick to make thread repair
inserts for
stripped aluminum using steel setscrews. I'll
anneal them
first then mount them in the chuck with this trick
to cut the
internal threads of the insert. These work much
better than
heli-coils. On the larger screws I'll cut a groove
down the
outside threads of the insert and after it's
turned in to depth
I'll drive a stiff wire down the groove to lock it
all in place.
phil