Or running at 8,000 RPM in a three pulley wood/steel model.
Martin

Rick wrote:

"Hul Tytus" wrote in message
...
rec.crafts.metalworking
masonry drill warning

Anyone know why a 1/4 masonry drill has a warning "don't use on a
drill press"
? This came from a local hardware store.

Hul

If it's your typical Vermont American double flute, I've found the
shanks on some are soft enough to be bent over by hand while chucked .

Couple of guesses..in a hand drill they are free to drift a little when
hitting the edge of aggregate. Could also be an issue with the powder
jamming the bit in the hole.