i am screwing down a chipboaard floor at the moment and for each screw
I have to use three bits: one for the hole in the chipboard, one
(smaller) pilot hole in the joist and then a countersink.

I seem to remember that you could buy special bits that did all three
at once. The bit was matched to a particular size and length of
screw.

Scewfix and local shed don't seem to do them. Do they exist? Does
anyone know where I can get one from please?

thanks ,

Robert

On 15 Feb 2007 03:54:22 -0800, "Robert Laws"
mused:


i am screwing down a chipboaard floor at the moment and for each screw
I have to use three bits: one for the hole in the chipboard, one
(smaller) pilot hole in the joist and then a countersink.

Flip bit\driver

I seem to remember that you could buy special bits that did all three
at once. The bit was matched to a particular size and length of
screw.

Scewfix and local shed don't seem to do them. Do they exist? Does
anyone know where I can get one from please?

http://www.screwfix.com/app/sfd/cat/...15325&ts=41063


--
Regards,
Stuart.

On Thu, 15 Feb 2007 03:54:22 -0800, Robert Laws wrote:


i am screwing down a chipboaard floor at the moment and for each screw I
have to use three bits: one for the hole in the chipboard, one (smaller)
pilot hole in the joist and then a countersink.

I seem to remember that you could buy special bits that did all three at
once. The bit was matched to a particular size and length of screw.

Scewfix and local shed don't seem to do them. Do they exist? Does anyone
know where I can get one from please?

thanks ,

Robert

===============================
Not quite what you're looking for but very similar:

http://www.machinemart.co.uk/shop/se...+drills/page/1

http://www.screwfix.com/app/sfd/cat/...13110&ts=41344

I don't think I've ever seen the three diameter bits you describe.

Cic.

--
================================
Testing UBUNTU Linux
Everything working so far
================================

Robert Laws wrote:
i am screwing down a chipboaard floor at the moment and for each screw
I have to use three bits: one for the hole in the chipboard, one
(smaller) pilot hole in the joist and then a countersink.

I seem to remember that you could buy special bits that did all three
at once. The bit was matched to a particular size and length of
screw.

Scewfix and local shed don't seem to do them. Do they exist? Does
anyone know where I can get one from please?

Google "tapered drill and countersink"

http://www.choiceful.com/disprod.php?pId=2309 looks cheap.

--
Adrian C

In article . com,
Robert Laws writes

i am screwing down a chipboaard floor at the moment and for each screw
I have to use three bits: one for the hole in the chipboard, one
(smaller) pilot hole in the joist and then a countersink.

I seem to remember that you could buy special bits that did all three
at once. The bit was matched to a particular size and length of
screw.

Scewfix and local shed don't seem to do them. Do they exist? Does
anyone know where I can get one from please?

See:
http://www.toolstation.com/search.html?searchstr=40882
or
http://www.toolstation.com/search.html?searchstr=99174
or
http://www.transtools.co.uk/store/prod_2036/power-tool-
accessories/specialist-drill-bits/4-piece-drill-pilot-screw-countersink-
set.html
tiny'd to: http://preview.tinyurl.com/2cyhhn

or google for Drill Pilot Countersink
--
fred
Plusnet - I hope you like vanilla

On Thu, 15 Feb 2007 03:54:22 -0800, Robert Laws wrote:


i am screwing down a chipboaard floor at the moment and for each screw I
have to use three bits: one for the hole in the chipboard, one (smaller)
pilot hole in the joist and then a countersink.

I seem to remember that you could buy special bits that did all three at
once. The bit was matched to a particular size and length of screw.

Scewfix and local shed don't seem to do them. Do they exist? Does anyone
know where I can get one from please?

thanks ,

Robert

===============================
An afterthought........

Have you considered using drywall screws?:

http://www.screwfix.com/app/sfd/cat/...12984&ts=42052

These are sharp enough to go through most chipboard and wood in one go
without pre-drilling and they're readily available from local stores. They
are quite brittle so they won't suit every job.

Cic.

--
================================
Testing UBUNTU Linux
Everything working so far
================================

On Feb 15, 12:04 pm, Lurch wrote:
On 15 Feb 2007 03:54:22 -0800, "Robert Laws"
mused:



i am screwing down a chipboaard floor at the moment and for each screw
I have to use three bits: one for the hole in the chipboard, one
(smaller) pilot hole in the joist and then a countersink.

Flip bit\driver

I seem to remember that you could buy special bits that did all three
at once. The bit was matched to a particular size and length of
screw.

Scewfix and local shed don't seem to do them. Do they exist? Does
anyone know where I can get one from please?

http://www.screwfix.com/app/sfd/cat/...15325&ts=41063


Aha, screwfix had filed it under 'screwdriver bits' rather than drill
bit.

many thanks,

Robert

On Feb 15, 12:26 pm, Cicero wrote:
On Thu, 15 Feb 2007 03:54:22 -0800, Robert Laws wrote:

i am screwing down a chipboaard floor at the moment and for each screw I
have to use three bits: one for the hole in the chipboard, one (smaller)
pilot hole in the joist and then a countersink.

I seem to remember that you could buy special bits that did all three at
once. The bit was matched to a particular size and length of screw.

Scewfix and local shed don't seem to do them. Do they exist? Does anyone
know where I can get one from please?

thanks ,

Robert

===============================
An afterthought........

Have you considered using drywall screws?:

http://www.screwfix.com/app/sfd/cat/...12984&ts=42052

These are sharp enough to go through most chipboard and wood in one go
without pre-drilling and they're readily available from local stores. They
are quite brittle so they won't suit every job.

i'd feel happier with a drilled hole. I'm not sure how easy these
woul dbw to remove, but it is athought.

Robert

In article . com,
Robert Laws wrote:

i am screwing down a chipboaard floor at the moment and for each
screw I have to use three bits: one for the hole in the
chipboard, one (smaller) pilot hole in the joist and then a
countersink.

I did something similar with twinstart c'sunk
screws, a drill and an electric screwdriver.

Drill a clearance hole in the chip, drop
the screw in, tap it into the joist, then
drive it home. It pulls its own c'sink.

It is much more efficient to do 6 or 8 at
one time, (whatever number can be stretched
to without moving), then move everything to
the next position.

--
Tony Williams.

On 15 Feb, 11:54, "Robert Laws" wrote:

i am screwing down a chipboaard floor at the moment and for each screw
I have to use three bits: one for the hole in the chipboard, one
(smaller) pilot hole in the joist and then a countersink.

I seem to remember that you could buy special bits that did all three
at once. The bit was matched to a particular size and length of
screw.

Scewfix and local shed don't seem to do them. Do they exist? Does
anyone know where I can get one from please?

thanks ,

Robert

Screfix do them but IME theyre useless as the dimensions are wrong for
every job I could think of.

Solution is to make your own. Takes a bit of time but you get what you
need, and it saves ages on the job. Buy a long bit the size of the
clearance hole, grind it down for the pilot bit, screw on a drilled
slitted lump as a countersink, perfect.


NT

On 15 Feb, 13:40, wrote:
On 15 Feb, 11:54, "Robert Laws" wrote:

i am screwing down a chipboaard floor at the moment and for each screw
I have to use three bits: one for the hole in the chipboard, one
(smaller) pilot hole in the joist and then a countersink.

I seem to remember that you could buy special bits that did all three
at once. The bit was matched to a particular size and length of
screw.

Scewfix and local shed don't seem to do them. Do they exist? Does
anyone know where I can get one from please?

thanks ,

Robert

Screfix do them but IME theyre useless as the dimensions are wrong for
every job I could think of.

Solution is to make your own. Takes a bit of time but you get what you
need, and it saves ages on the job. Buy a long bit the size of the
clearance hole, grind it down for the pilot bit, screw on a drilled
slitted lump as a countersink, perfect.

NT

and regrind the tip to make it drill miles faster


NT

In article . com,
Robert Laws wrote:
i am screwing down a chipboaard floor at the moment and for each screw
I have to use three bits: one for the hole in the chipboard, one
(smaller) pilot hole in the joist and then a countersink.

I seem to remember that you could buy special bits that did all three
at once. The bit was matched to a particular size and length of
screw.

You're right - IIRC made by Stanley and rather expensive. But worked very
well.

Scewfix and local shed don't seem to do them. Do they exist? Does
anyone know where I can get one from please?

There are similar devices which use a standard drill with the countersink
part fixed to it. I'm pretty sure Screwfix do sell them. But they break
the drill quite easily (which can be replaced separately) - the Stanley
all in one 'flat' blade type was far stronger.

--
*Some people are only alive because it is illegal to kill.

Dave Plowman London SW
To e-mail, change noise into sound.

On Thu, 15 Feb 2007 12:26:09 +0000, Cicero wrote:

Have you considered using drywall screws?:

http://www.screwfix.com/app/sfd/cat/...12984&ts=42052

These are sharp enough to go through most chipboard and wood in one go
without pre-drilling and they're readily available from local stores. They
are quite brittle so they won't suit every job.

You don't need drywall: any self-respecting chipboard screw should be able
to be screwed directly through chipboard into joists without any
pre-drilling. Something like Spax or Screwfix goldscrews in 5*50 with a
decent cordless drill/driver will do them in no time.

On Feb 15, 1:54 pm, "Dave Plowman (News)"
wrote:
In article . com,
Robert Laws wrote:

i am screwing down a chipboaard floor at the moment and for each screw
I have to use three bits: one for the hole in the chipboard, one
(smaller) pilot hole in the joist and then a countersink.
I seem to remember that you could buy special bits that did all three
at once. The bit was matched to a particular size and length of
screw.

You're right - IIRC made by Stanley and rather expensive. But worked very
well.

Scewfix and local shed don't seem to do them. Do they exist? Does
anyone know where I can get one from please?

There are similar devices which use a standard drill with the countersink
part fixed to it. I'm pretty sure Screwfix do sell them. But they break
the drill quite easily (which can be replaced separately) - the Stanley
all in one 'flat' blade type was far stronger.

I remember now where I saw these; it was when I lived in Norway 20
years ago. When you bought a box of screws you could buy the
matching special bit at the same time. It looked a bit like a screw
bonded onto a shaft except the front part of it was thinner than the
screw of course. Also the countersink had a smooth flat lip so that
you CS only to exactly the right depth.

R

"Robert Laws" wrote in message
oups.com...
On Feb 15, 12:26 pm, Cicero wrote:
On Thu, 15 Feb 2007 03:54:22 -0800, Robert Laws wrote:

i am screwing down a chipboaard floor at the moment and for each screw
I
have to use three bits: one for the hole in the chipboard, one
(smaller)
pilot hole in the joist and then a countersink.

I seem to remember that you could buy special bits that did all three
at
once. The bit was matched to a particular size and length of screw.

Scewfix and local shed don't seem to do them. Do they exist? Does
anyone
know where I can get one from please?

thanks ,

Robert

===============================
An afterthought........

Have you considered using drywall screws?:

http://www.screwfix.com/app/sfd/cat/...12984&ts=42052

These are sharp enough to go through most chipboard and wood in one go
without pre-drilling and they're readily available from local stores.
They
are quite brittle so they won't suit every job.

i'd feel happier with a drilled hole. I'm not sure how easy these
woul dbw to remove, but it is athought.

Robert


Not sure what thickness your chipboard is, but when I tiled my bathroom
floor, I screwed down 19mm plywood into floorboards with Screwfix turbogold
screws using my cheapo 24v cordless drill. No pre-drilling and they worked
fine as they self-countersink. Only minor problem was setting initial torque
to prevent them going in too deep. Screwhead undamaged and they would come
out again if need be (but with a layer of ceramic tiles on the top, I hope I
don't to have to prove this any time soon!)

John Miller

On Feb 15, 12:11 pm, Cicero wrote:
On Thu, 15 Feb2007 03:54:22 -0800, Robert Laws wrote:

i am screwing down a chipboaard floor at the moment and for each screw I
have to use three bits: one for the hole in the chipboard, one (smaller)
pilot hole in the joist and then a countersink.

I seem to remember that you could buy special bits that did all three at
once. The bit was matched to a particular size and length of screw.

Scewfix and local shed don't seem to do them. Do they exist? Does anyone
know where I can get one from please?

thanks ,

Robert

===============================
Not quite what you're looking for but very similar:

http://www.machinemart.co.uk/shop/se...sink++drills/p...

http://www.machinemart.co.uk/shop/pr...ntersink-bit-s

http://www.screwfix.com/app/sfd/cat/...13110&ts=41344

All much better bets than the one Lurch suggested. In my experience
the aluminium shaft or something in the gubbins of the flip mechanism
fails fairly soon after buying it and very soon after using it.

(I supose it is a matter of how often one uses it.) You only need to
flip it the once after drilling all the required holes. I don't
remember them having counterbores.

The sets come in various dubious qualities but the counterbore is
capable of being fitted to real drill bits, once the crap ones they
come with have failed. Check that they ARE moveable. Some come as a
fixed one piece bit.

On Feb 15, 12:42 pm, "Robert Laws" wrote:
On Feb 15, 12:26 pm, Cicero wrote:

On Thu, 15 Feb2007 03:54:22 -0800, Robert Laws wrote:

I am screwing down a chipboaard floor at the moment and for each screw I
have to use three bits: one for the hole in the chipboard, one (smaller)
pilot hole in the joist and then a countersink.

I seem to remember that you could buy special bits that did all three at
once. The bit was matched to a particular size and length of screw.

Scewfix and local shed don't seem to do them. Do they exist? Does anyone
know where I can get one from please?

===============================
An afterthought........

Have you considered using drywall screws?:

http://www.screwfix.com/app/sfd/cat/...12984&ts=42052

These are sharp enough to go through most chipboard and wood in one go
without pre-drilling and they're readily available from local stores. They
are quite brittle so they won't suit every job.

I'd feel happier with a drilled hole. I'm not sure how easy these
would be to remove, but it is a thought.

Black or whatever screws for p/bd tend to be very brittle that is why
they are not used for such efforts on sites. But you can get them with
a drill bit end, I think they are called "tx screws". Not sure how
strong they are though. They must be quite good if they are designed
for mild steel. (Very thin mild steel.)

For boards one aught to predrill the screws. Chipboard is not so bad
but it is critical with MDF. Go easy with the counterbore on chipboard.

On Feb 16, 8:27 am, "Robert Laws" wrote:
On Feb 15, 1:54 pm, "Dave Plowman (News)"
wrote:



In article . com,
Robert Laws wrote:

i am screwing down a chipboaard floor at the moment and for each screw
I have to use three bits: one for the hole in the chipboard, one
(smaller) pilot hole in the joist and then a countersink.
I seem to remember that you could buy special bits that did all three
at once. The bit was matched to a particular size and length of
screw.

You're right - IIRC made by Stanley and rather expensive. But worked very
well.

Scewfix and local shed don't seem to do them. Do they exist? Does
anyone know where I can get one from please?

There are similar devices which use a standard drill with the countersink
part fixed to it. I'm pretty sure Screwfix do sell them. But they break
the drill quite easily (which can be replaced separately) - the Stanley
all in one 'flat' blade type was far stronger.

I remember now where I saw these; it was when I lived in Norway 20
years ago. When you bought a box of screws you could buy the
matching special bit at the same time. It looked a bit like a screw
bonded onto a shaft except the front part of it was thinner than the
screw of course. Also the countersink had a smooth flat lip so that
you CS only to exactly the right depth.

One can convert a flatbit to do the job. Not worth it but I thought
I'd mention it. Handy to remember on a site miles from anywhere. Also
you can convert any small bit of steel the same way.

Not that I would recommend either idea except for emergencies. (If you
haven't got a few odd black screws in the bottom of your pouch, for
example.)

On 16 Feb 2007 18:56:19 -0800, "Weatherlawyer"
mused:

On Feb 15, 12:11 pm, Cicero wrote:
On Thu, 15 Feb2007 03:54:22 -0800, Robert Laws wrote:

i am screwing down a chipboaard floor at the moment and for each screw I
have to use three bits: one for the hole in the chipboard, one (smaller)
pilot hole in the joist and then a countersink.

I seem to remember that you could buy special bits that did all three at
once. The bit was matched to a particular size and length of screw.

Scewfix and local shed don't seem to do them. Do they exist? Does anyone
know where I can get one from please?

thanks ,

Robert

===============================
Not quite what you're looking for but very similar:

http://www.machinemart.co.uk/shop/se...sink++drills/p...

http://www.machinemart.co.uk/shop/pr...ntersink-bit-s

http://www.screwfix.com/app/sfd/cat/...13110&ts=41344

All much better bets than the one Lurch suggested. In my experience
the aluminium shaft or something in the gubbins of the flip mechanism
fails fairly soon after buying it and very soon after using it.

Probably, although for the price I just replace them every now and
again, that's if they're not 'borrowed' before I break them\wear them
out. I know the one's I posted weren't the most sturdy but I use them
fairly frequently and they're not shoddy by any means.

I did have a set of Snappy bits thinking about it, same idea but a bit
more on the heavy duty side.

(I supose it is a matter of how often one uses it.) You only need to
flip it the once after drilling all the required holes. I don't
remember them having counterbores.

The sets come in various dubious qualities but the counterbore is
capable of being fitted to real drill bits, once the crap ones they
come with have failed. Check that they ARE moveable. Some come as a
fixed one piece bit.

--
Regards,
Stuart.

On Feb 17, 3:34 am, Lurch wrote:
On 16 Feb2007 18:56:19 -0800, "Weatherlawyer"
mused:

All much better bets than the one Lurch suggested. In my experience
the aluminium shaft or something in the gubbins of the flip mechanism
fails fairly soon after buying it and very soon after using it.

Probably, although for the price I just replace them every now and
again, that's if they're not 'borrowed' before I break them\wear them
out. I know the one's I posted weren't the most sturdy but I use them
fairly frequently and they're not shoddy by any means.

I did have a set of Snappy bits thinking about it, same idea but a bit
more on the heavy duty side.

I can remember buying one and IIRC I misused it through not taking
care how it was set up. It was an expensive waste of time and space
after that. I did get it changed for something else, though the
shopkeeper was unhappy about it.

I would have swallowed the loss if I had realised at the time that it
had been my fault but I am a self righteous 2@ at times. I bought a
box of screwdriver bits then went back for 2 more boxes so he made out
OK-ish from it. When I eventually went back for more he'd sold out.

The box of adjustable countersink/drills that I eventually bought is
still more or less intact of course, as I never use the bloody things.

John Miller wrote:

Not sure what thickness your chipboard is, but when I tiled my
bathroom floor, I screwed down 19mm plywood into floorboards with
Screwfix turbogold screws using my cheapo 24v cordless drill. No
pre-drilling and they worked fine as they self-countersink.

That's the way I'd go. Turbogold are brilliamt for this sort of job.



--
Dave
The Medway Handyman
www.medwayhandyman.co.uk
01634 717930
07850 597257