On Sep 27, 12:06 am, cc wrote:
I am sure this has a simple answer

Was tuning up my band saw and adjusting motor pulley, which uses a set
screw. Guess I turned it too tight, rounded off the allen wrench and
now it just turns. It is a metric 3.0 wrench. I also assum the set
screw itself is probably also damaged.

My only solution I see is to eposy the wrnech to the set screw and
then replace both when I get it loose, but don't know if you can buy
individual allen wrenches..

any helpful suggestions?

I sharpen the multispur bits for the plumbers and the pilot screws are
locked in with an allen set screw which is often frozen.
I make my own extractor from a piece of handsaw file ground to be
sharp and turned with vise grip pliers. The ends of the file have a
nice taper and you can pick the closest size match and drive it in to
"bite" the insides of the rounded off allen.
Grind down your hex key wrench to expose an unrounded surface, they
are prety much usable until too small to hold onto.

Daily Grind