Graham wrote:
JB wrote:
It is probably so galled that you won't get it off without having to retap
anyway. Too bad you can't just work around it.

Bummer



-- heating the Allen wrench with a heatgun while engaged with the
setscrew and turning
-- heating the Allen wrench to 450 degrees and then inserting it into
the setscrew and turning

No wonder the wrench bent ! .. you need to heat the alloy knob with
the heat gun .. as hot as you can get it .. with the hole to the top
so you can drip some thin oil in ... then if you like chill the
wrench ... and have a go ... your lucky the hex key still gets a
grip .. ....

need alloy as hot as possible
screw as cold as possible

slight nip clockwise first may break the bond

G ..

Dunno if this'd work but, Locktite "High Strength Thread Locker" is pretty
strong stuff. It's strong enough to lock the ½" diameter engine cylinder
head studs in my racecar's engine. Perhaps you could "glue" the Allen
wrench into the setscrew (being careful to not get any on the threads), let
it cure overnight, and try breaking the screw loose afterward. See
http://tinyurl.com/9zvre5 to see which one might be "bestest". Poor quality
(soft alloy steel) Allen wrenches will twist/bend... start with a good
quality Allen Wrench. Use heat to release the thread locker. If *that*
won't do it, I think you'll be drilling the screw out and retapping to the
next larger size.

vy 73,
Bryan WA7PRC