Hi

Been drilling lots of 3" deep holes in masonry, then fitting 2
wallplugs into each to screw into. Sometimes 2 will go in, but often
not, and I'm not seeing why. I dont see how it could be remaining
debris in the hole, as the drill bit fitted ok. The plugs are lipless
and not tight in the hole. Any ideas?


NT

wrote in message
...
Hi

Been drilling lots of 3" deep holes in masonry, then fitting 2
wallplugs into each to screw into. Sometimes 2 will go in, but often
not, and I'm not seeing why. I dont see how it could be remaining
debris in the hole, as the drill bit fitted ok. The plugs are lipless
and not tight in the hole. Any ideas?


NT

I don't understand why you are not using a suitable (single ) plug.

wrote:
Hi

Been drilling lots of 3" deep holes in masonry, then fitting 2
wallplugs into each to screw into. Sometimes 2 will go in, but often
not, and I'm not seeing why. I dont see how it could be remaining
debris in the hole, as the drill bit fitted ok. The plugs are lipless
and not tight in the hole. Any ideas?

I have never fitted two plugs, but I have sometimes found a plug is just
not wanting to go in. So I have effectively reamed the hole with the
drill - moving the drill slowly into the hole and out while still spinning.

I think that holes can spiral slightly - particularly in fairly soft
material. Therefore the tip of the drill has no problem but a solid lump
of the same diameter does. Most likely if the difference in diameter
between the actual drill tip and the spiral, fluted part is significant.
(So most likely on a drill that has been mis-used for enlarging holes
sideways. As if anyone would do such a thing?)

--
Rod

Hypothyroidism is a seriously debilitating condition with an insidious
onset.
Although common it frequently goes undiagnosed.
www.thyromind.info www.thyroiduk.org www.altsupportthyroid.org

On 19 Jun, 23:02, wrote:
Hi

Been drilling lots of 3" deep holes in masonry, then fitting 2
wallplugs into each to screw into. Sometimes 2 will go in, but often
not, and I'm not seeing why. I dont see how it could be remaining
debris in the hole, as the drill bit fitted ok. The plugs are lipless
and not tight in the hole. Any ideas?

NT

Usually the hole is not cleaned out properly, and brick dust is at the
back of the hole blocking it. The masonry drill design allow this to
happen, since the shaft is thin and the tip is kind of flattened.
Also, the hole can be a bit jagged, or a loose bit of brick / mortar
can drop down into the hole. Often you can pull out the drill bit and
when you push it straight back in it does not go all the way back in.
Hoover out, blow it out (close your eyes), or otherwise extract the
debris. You can use a twist drill to do this, indicating why a masonry
bit allows it in the first place. Its been this every time I've had
the problem.
Simon.

On Jun 20, 10:14*am, sm_jamieson wrote:
On 19 Jun, 23:02, wrote:

Hi

Been drilling lots of 3" deep holes in masonry, then fitting 2
wallplugs into each to screw into. Sometimes 2 will go in, but often
not, and I'm not seeing why. I dont see how it could be remaining
debris in the hole, as the drill bit fitted ok. The plugs are lipless
and not tight in the hole. Any ideas?

NT

Usually the hole is not cleaned out properly, and brick dust is at the
back of the hole blocking it. The masonry drill design allow this to
happen, since the shaft is thin and the tip is kind of flattened.
Also, the hole can be a bit jagged, or a loose bit of brick / mortar
can drop down into the hole. Often you can pull out the drill bit and
when you push it straight back in it does not go all the way back in.
Hoover out, blow it out (close your eyes), or otherwise extract the
debris. You can use a twist drill to do this, indicating why a masonry
bit allows it in the first place. Its been this every time I've had
the problem.
Simon.


Yeah, I suspect my clearing technique is inadequate. I've used hoover
or blown in, but I dont see that working at the bottom of a blind 3"
hole, so I guess it needs a blower with a tube on.

Why am I uing 2 plugs? weak masonry, one plug is too insecure.

cheers, NT

snip

I guess it needs a blower with a tube on.
cheers, NT

I use a bendy straw. Bend it 90 degress; put short end in the hole;
blow in the long end - saves a black / dusty face. A few of them live
in my tool box.


M.

On Fri, 20 Jun 2008 02:14:36 -0700 (PDT), sm_jamieson
wrote:

Usually the hole is not cleaned out properly, and brick dust is at the
back of the hole blocking it. The masonry drill design allow this to
happen, since the shaft is thin and the tip is kind of flattened.
Also, the hole can be a bit jagged, or a loose bit of brick / mortar
can drop down into the hole. Often you can pull out the drill bit and
when you push it straight back in it does not go all the way back in.
Hoover out, blow it out (close your eyes), or otherwise extract the
debris. You can use a twist drill to do this, indicating why a masonry
bit allows it in the first place. Its been this every time I've had
the problem.

Hilti used to (they may still) sell a rubber bulb fitted to a bit of
rigid plastic pipe, to blow debris out of drilled holes.

--
Frank Erskine

Frank Erskine wrote:
On Fri, 20 Jun 2008 02:14:36 -0700 (PDT), sm_jamieson
wrote:

Usually the hole is not cleaned out properly, and brick dust is at the
back of the hole blocking it. The masonry drill design allow this to
happen, since the shaft is thin and the tip is kind of flattened.
Also, the hole can be a bit jagged, or a loose bit of brick / mortar
can drop down into the hole. Often you can pull out the drill bit and
when you push it straight back in it does not go all the way back in.
Hoover out, blow it out (close your eyes), or otherwise extract the
debris. You can use a twist drill to do this, indicating why a masonry
bit allows it in the first place. Its been this every time I've had
the problem.

Hilti used to (they may still) sell a rubber bulb fitted to a bit of
rigid plastic pipe, to blow debris out of drilled holes.


Or just drill a deeper hole than you need to accommodate the debris

sm_jamieson wrote:
On 19 Jun, 23:02, wrote:
Hi

Been drilling lots of 3" deep holes in masonry, then fitting 2
wallplugs into each to screw into. Sometimes 2 will go in, but often
not, and I'm not seeing why. I dont see how it could be remaining
debris in the hole, as the drill bit fitted ok. The plugs are lipless
and not tight in the hole. Any ideas?

NT

Usually the hole is not cleaned out properly, and brick dust is at the
back of the hole blocking it. The masonry drill design allow this to
happen, since the shaft is thin and the tip is kind of flattened.
Also, the hole can be a bit jagged, or a loose bit of brick / mortar
can drop down into the hole. Often you can pull out the drill bit and
when you push it straight back in it does not go all the way back in.
Hoover out, blow it out (close your eyes), or otherwise extract the
debris. You can use a twist drill to do this, indicating why a masonry
bit allows it in the first place. Its been this every time I've had
the problem.
Simon.
Use the fan on the drill to blow the **** out.

On Jun 20, 10:18*pm, The Natural Philosopher wrote:
sm_jamieson wrote:
On 19 Jun, 23:02, wrote:

Hi

Been drilling lots of 3" deep holes in masonry, then fitting 2
wallplugs into each to screw into. Sometimes 2 will go in, but often
not, and I'm not seeing why. I dont see how it could be remaining
debris in the hole, as the drill bit fitted ok. The plugs are lipless
and not tight in the hole. Any ideas?

NT

Usually the hole is not cleaned out properly, and brick dust is at the
back of the hole blocking it. The masonry drill design allow this to
happen, since the shaft is thin and the tip is kind of flattened.
Also, the hole can be a bit jagged, or a loose bit of brick / mortar
can drop down into the hole. Often you can pull out the drill bit and
when you push it straight back in it does not go all the way back in.
Hoover out, blow it out (close your eyes), or otherwise extract the
debris. You can use a twist drill to do this, indicating why a masonry
bit allows it in the first place. Its been this every time I've had
the problem.
Simon.

Use the fan on the drill to blow the **** out.


clever, will try that


NT