According to Mike Dobony :

"DanG" wrote in message
...
If you really like the Skil brand gun you have, try here for the part:
http://www.toolpartsdirect.com/cgi-bin/noframes.cgi/skil/6906_TYPE_2

That has every part of the gun EXCEPT the specialized tool holder. If I had
a metal lathe and carbide cutting tip I could turn down the shaft of a
DeWalt bit holder (http://www.grizzly.com/products/h4639) and make it work.
The problem is that the seal at the end of the drill portion is smaller than
a standard tool holder. Just above the hex shank I need the holder turned
down from about 0.450" to 0.370" for about 0.650", a simple operation IF I
had a metal lathe. I can find lots of bit holders that are the right
length, but they are too thick to fit in the gun.

Something like that you can probably do while holding the bit
in a drill against a grinding wheel and go slowly, dip the end
in water frequently.

In other cases, you might be able to drive the shank out
of the body far enough to work using a flat end punch and
a decent hammer. If it falls out, glue it back in with
epoxy.

Aha - look half way down http://www.wihatools.com/700_BitHolders.htm

there you go.
--
Chris Lewis,

Age and Treachery will Triumph over Youth and Skill
It's not just anyone who gets a Starship Cruiser class named after them.