On Sun, 17 Oct 2004 19:29:03 -0400, Carlos Moreno
wrote:

the drill bit has a 1/4 shank that fits perfectly in
the router head, is it ok in that case? Or is 8000 rpm
still too much for the drill bit?

Far too high.

I wouldn't drill 1/4" in timber at over 1000 rpm (from choice). You
can _drill_ faster than this (although not 8000 !) but your risk is of
snatching if the drill decides to stick or jam. At this speed
there'll be a risk of over-heating which will accelerate the jamming
problem.

Like many people, I have a cheap square-chisel morticer that can be
used as a drill press. This is a direct drive motor at 1400 rpm (1700
in the US) and is certainly unpleasantly over-speed for drilling above
1/8".

If you do try this, you'll drill a pefect and highly polished hole.
Until you're almost finished when there _will_ be a bang and the
router will fly sideways, leaving some parts of the drill embedded in
either your or the timber.

--
Smert' spamionam