"Veeduber" wrote in message
...
What I recall is that it's
somewhere around 30,000.

------------------------------------------

Really? I sure hope not! :-)

(Mebbe I meant 3,000 ...piloting for AD3's)

-R.S.Hoover

Did I say that? Pheweeeeee. Here it is, corrected. May I quote you?:

There's a handy little formula that sez how fast a drill bit of a given
diameter has to be rotating to cut a clean hole in materials of various
types.
Drilling aruminum, using a #41 bit, your drill motor has to be capable of
spinning about 3000 rpm. At that speed a sheet of forty thou is virtually
transparent to the bit. Just touch the trigger and there's the hole, nice
and
neat and round and with the smallest possible lip.