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

On Dec 28, 12:26 am, 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


Its mandated there by the same people who put "don't touch moving
blade" on chainsaws. And its a vain and futile attempt to protect the
really dumb from themselves - it usually doesn't work (ie, they don't/
cant/wont/ read the instructions) and the lucky ones get nominated for
Darwin Awards.

Just my opinion, of course. Sorta makes sense.

Andrew VK3BFA

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


It's been my experience that a carbide tip breaking off is safer when it
happens in a hand drill, away from your face, than in a drill press at
chest or eye level. YMMV

--
Steve Walker
(remove wallet to reply)

In article , 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.

I have no idea, and I have used masonry drills in a drill press to drill
through hardened steel. Very noisy, boils the coolant and nonetheless
ruins the drill, but it does work.

Joe Gwinn

Mandated by the same civil servants that put a warning label on a
bag of peanuts saying "warning, contains peanuts"

On Dec 27, 9:22*am, Andrew VK3BFA wrote:
On Dec 28, 12:26 am, Hul Tytus wrote:
Anyone know why a 1/4 masonry drill has a warning "don't use on a drill press"
Hul

Its mandated there by the same people who put "don't touch moving
blade" on chainsaws. ...
Andrew VK3BFA

I have a tube of bandsaw blade wax that warns not to apply it to a
moving blade.

jsw

"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

What type of masonry is your drill press made of?

On Dec 27, 11:48*am, "Lib Loo" wrote:
"Hul Tytus" wrote in message
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

What type of masonry is your drill press made of?

Post-tensioned concrete.

"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.

"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

Masonry drills are designed for slower speeds and hammering action. Using
these bits in a drill is not the best idea because you'll need a good jig to
hold your workpiece down. Most people can't design a jig. Also masonry
bits tend to crush during cutting which makes them a poor choice to use on a
drill press because they'll walk or skate unless you apply lots of pressure.
It's easier to apply pressure by using a hand drill/hammer drill than many
small home shop drill presses. They seem a bit dangerous to use on a press.

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

Hul Tytus wrote:

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.

I'm speculating, but maybe with the cutting geometry of a masonry drill, they are
concerned that a drill press will cause enough friction to loosen the bond between the
carbide and steel body.

Masonry drills are not very sharp.

Wes
--
"Additionally as a security officer, I carry a gun to protect
government officials but my life isn't worth protecting at home
in their eyes." Dick Anthony Heller

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

It's difficult to balance the masonry on the drill press table?

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

because you're supposed to use then with a hammer drill, not a drill
press.

they work by crushing concrete or whatever, not cutting into it.

If you don't believe it, just look at the tip. There's nothing cutting or
sharp about it.

With a hammer drill you can drill masonry with regular bits, but they will
break quicker.

Might be a case of chipping carbide towards an eye that got them in trouble.

No matter what you do, at a drill press stuff cuts and chips and flies.

Use an apron, face shield and ear protection and then some.

Martin

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

I can just see a finger pushing the wax onto the blade....

Martin

Jim Wilkins wrote:
On Dec 27, 9:22 am, Andrew VK3BFA wrote:
On Dec 28, 12:26 am, Hul Tytus wrote:
Anyone know why a 1/4 masonry drill has a warning "don't use on a drill press"
Hul
Its mandated there by the same people who put "don't touch moving
blade" on chainsaws. ...
Andrew VK3BFA

I have a tube of bandsaw blade wax that warns not to apply it to a
moving blade.

jsw

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.

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

Jim Wilkins wrote:

On Dec 27, 9:22 am, Andrew VK3BFA wrote:
On Dec 28, 12:26 am, Hul Tytus wrote:
Anyone know why a 1/4 masonry drill has a warning "don't use on a drill press"
Hul

Its mandated there by the same people who put "don't touch moving
blade" on chainsaws. ...
Andrew VK3BFA

I have a tube of bandsaw blade wax that warns not to apply it to a
moving blade.


Come on Jim, everyone knows that's what earwax is for. Just make
sure to remove it from the ear, first. ;-)



--
Greed is the root of all eBay.

"Cydrome Leader" wrote in message
...
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

because you're supposed to use then with a hammer drill, not a drill
press.

they work by crushing concrete or whatever, not cutting into it.

If you don't believe it, just look at the tip. There's nothing cutting or
sharp about it.

With a hammer drill you can drill masonry with regular bits, but they will
break quicker.

He may not have a rotary/percussion bit..there are common "hardware store"
masonry bits that are for rotary use only, as shown he

http://www.mytoolstore.com/relton/techinfo.html

On Sun, 27 Dec 2009 18:41:19 -0500, Wes wrote:

Hul Tytus wrote:

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.

I'm speculating, but maybe with the cutting geometry of a masonry drill, they are
concerned that a drill press will cause enough friction to loosen the bond between the
carbide and steel body.

Masonry drills are not very sharp.

Wes


I have done that on one occasion when I thought I'd hit a bit of quartz in the
concrete that turned out to be an unexpected re-bar. After making no progress
for some time and leaning on the drill as hard as I could, I pulled the bit
out of the hole and saw that the end had gone blue and the carbide fell out of
the slot it was brazed into...


Mark Rand
RTFM

Mark Rand wrote:

I have done that on one occasion when I thought I'd hit a bit of quartz in the
concrete that turned out to be an unexpected re-bar. After making no progress
for some time and leaning on the drill as hard as I could, I pulled the bit
out of the hole and saw that the end had gone blue and the carbide fell out of
the slot it was brazed into...

You got lucky. I hit some rebar and the rotary hammer drill damn flipped me over.

Wes