It is nice to say it is a hammer-drill made product - now maybe sometimes.

I have a hammer drill now - a 1/2" SDS+ with a chuck as well. Before that,
I used a regular 3/8" slow slow speed drill. One drill I wish I still had.

Those drills are older than hand drills. I have a 3/4" 12" carbide drill.
It was for drilling through a 8"+ floor. My dad bought it in the late 50's.
The shaft to chuck up is smooth round. It is designed to slip.
He used his 1/2" death defying hand drill with gear train and it had to be
piped to something and held. If the drill caught and wrapped the drill around
it would keep turning with the power off for a number of turns.

My hammer is electronic control and is fast stop.

Martin


Mark Rand wrote:
On Sun, 27 Dec 2009 13:26:02 +0000 (UTC), Hul Tytus wrote:

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

masonry bits, as supplied have a significant negative rake cutting edge. they
are meant to be used in a hammer drill with brittle materials. As supplied
they will perform very poorly on any metal. If you know enough to re-sharpen
them correctly for use when drilling hardened steel, you know enough to safely
ignore the warning :-)


Mark Rand
RTFM