I have some plywood boards to fix to metal frames.
My plan is to use self-tappers.
Drill holes the width of the centre of the screws.
Then use an impact screwdriver?
Is this the best way to do it?

[g]

In article ,
george (dicegeorge) wrote:
I have some plywood boards to fix to metal frames.
My plan is to use self-tappers.
Drill holes the width of the centre of the screws.
Then use an impact screwdriver?
Is this the best way to do it?

If the plywood is thin I'd use nuts and bolts - with washers to spread the
load over the plywood.

--
*If you can read this, thank a teecher

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

george (dicegeorge) wrote:
I have some plywood boards to fix to metal frames.
My plan is to use self-tappers.
Drill holes the width of the centre of the screws.
Then use an impact screwdriver?
Is this the best way to do it?

You can get self drilling screws which can work well for this sort of
application.

--
Cheers,

John.

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george (dicegeorge) wrote:

I have some plywood boards to fix to metal frames.
My plan is to use self-tappers.

OK...

Drill holes the width of the centre of the screws.

There's an appropriate hole for each size of self-tapper. This is a
reasonable guide:

http://www.anzor.co.nz/?t=67

Then use an impact screwdriver?

boggle

Is this the best way to do it?

The last is great if you really mean to mash up the screw heads and
shear them off. Use a proper screwdriver or, since there seem to be lots
of screws to fix, a cordless drill with a torque setting.

Dave Plowman (News) wrote:
In article ,
george (dicegeorge) wrote:
I have some plywood boards to fix to metal frames.
My plan is to use self-tappers.
Drill holes the width of the centre of the screws.
Then use an impact screwdriver?
Is this the best way to do it?

If the plywood is thin I'd use nuts and bolts - with washers to spread the
load over the plywood.

the toilet frames are made of square section metal
so I dont think nuts and bolts will do,
they'd be bent when we pack it away for the winter

[g]

John Rumm wrote:
george (dicegeorge) wrote:
I have some plywood boards to fix to metal frames.
My plan is to use self-tappers.
Drill holes the width of the centre of the screws.
Then use an impact screwdriver?
Is this the best way to do it?

You can get self drilling screws which can work well for this sort of
application.


Rivets look neat

Steve Firth wrote:
george (dicegeorge) wrote:

I have some plywood boards to fix to metal frames.
My plan is to use self-tappers.

OK...

Drill holes the width of the centre of the screws.

There's an appropriate hole for each size of self-tapper. This is a
reasonable guide:

http://www.anzor.co.nz/?t=67

Then use an impact screwdriver?

boggle

Is this the best way to do it?

The last is great if you really mean to mash up the screw heads and
shear them off. Use a proper screwdriver or, since there seem to be lots
of screws to fix, a cordless drill with a torque setting.
So why is an impact screwdriver great for screwing into oak,
but not into metal?

george (dicegeorge) wrote:

So why is an impact screwdriver great for screwing into oak,
but not into metal?

I can't recall recommending an impact driver for such a task. I've used
one to get rusted in screws out of oak.

You're only trying to hold plywood to a metal frame WTF do you need an
impact driver for?

Steve Firth wrote:
george (dicegeorge) wrote:

So why is an impact screwdriver great for screwing into oak,
but not into metal?

I can't recall recommending an impact driver for such a task. I've used
one to get rusted in screws out of oak.

You're only trying to hold plywood to a metal frame WTF do you need an
impact driver for?

Are you sure you guys are talking about the same tool?

http://wiki.diyfaq.org.uk/index.php?...Disambiguation



--
Cheers,

John.

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| Internode Ltd - http://www.internode.co.uk |
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| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

John Rumm wrote:
Steve Firth wrote:
george (dicegeorge) wrote:

So why is an impact screwdriver great for screwing into oak,
but not into metal?

I can't recall recommending an impact driver for such a task. I've used
one to get rusted in screws out of oak.

You're only trying to hold plywood to a metal frame WTF do you need an
impact driver for?

Are you sure you guys are talking about the same tool?

http://wiki.diyfaq.org.uk/index.php?...Disambiguation



Yes i meant about using an impact screwdiver,
like the blue battery one in the picture,
it drives screws into oak.

But would it be suitable for driving self tapping screws into metal
framework?
Or is there a reason to use a electric drill on low torque setting?

[g]

george (dicegeorge) wrote:


John Rumm wrote:
Steve Firth wrote:
george (dicegeorge) wrote:

So why is an impact screwdriver great for screwing into oak,
but not into metal?

I can't recall recommending an impact driver for such a task. I've used
one to get rusted in screws out of oak.

You're only trying to hold plywood to a metal frame WTF do you need an
impact driver for?

Are you sure you guys are talking about the same tool?

http://wiki.diyfaq.org.uk/index.php?...Disambiguation



Yes i meant about using an impact screwdiver,
like the blue battery one in the picture,
it drives screws into oak.

But would it be suitable for driving self tapping screws into metal
framework?

They are often used for fixing drylining to metal studwork - usually
without pilot holes. I can't see any real difficulty unsing self tappers
into more substantial metalwork - just take care not to drive past "done"

Or is there a reason to use a electric drill on low torque setting?

If your cordless drill has a torque limiter and it can muster enough
torque to start the screw, then you can use that if you are worried
about over driving.

--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/

John Rumm wrote:

You're only trying to hold plywood to a metal frame WTF do you need an
impact driver for?

Are you sure you guys are talking about the same tool?

http://wiki.diyfaq.org.uk/index.php?...Disambiguation

I'm not sure which on George is on about, but both are overkill for
plywood to light metal IMNSHO.

John Rumm wrote:
george (dicegeorge) wrote:

I have some plywood boards to fix to metal frames.

You can get self drilling screws which can work well for this sort of
application.

Seconded. A mate's dad boarded out his vast (as in, space to work on
half a dozen cars simultaneously) workshop using hex-head Tek Screws to
fix ply to thin steel. No drilling required, just press the screw to the
required location and pull the trigger. If the job had required
pre-drilled holes in each board it probably wouldn't be finished yet.

Pete