Yes Ken you're right the dental drills do run those speeds but they sure
are no wood hoggers, I was commenting on the Foredom units and did not
think of a dental instrument.
Never to old to learn I hopeG

Have fun and take care
Leo Van Der Loo

Ken Moon wrote:
"Leo Van Der Loo" wrote in message
.rogers.com...

Yes these tools run fast but not that fast, the Foredom run from 5000 to
20 000rpm for the flex cable units, the $945.00 Micro motor at a max of
45 000rpm and is used with diamond or carbide disk or tips

======================
Leo,
The units he's talking are essentially modified dental drills, operated by
an air turbine. The RPM is determined by air pressure, but spees up 400,000
RPM are obtainable and usable with them. Of course, the bits are usually in
the 1/8 " range. much larger, aned they could begin vibration and self
destruct. (Think Dremel at 30,000 RPM with the bit extended almost all the
way out. Then take that up X10).

Ken Moon
Webberville, TX