what's the name of the drill bit....

[_Deano]

...that can be used, to remove a screw with a damaged head?

I am trying to take up the decking in the garden, but some of the screws will not come out as the head is damaged.

I've been trying to find it in B&Q, but they seem to be next to useless and had no idea what i wanted.

Thanks

[HRG]

Do you mean a countersink bit? If you're trying to remove just the screw head then that's what it's called.

[mickk]

Is this what you mean?
http://www.screwfix.com/prods/21391/Drill-Bits/Spe...

[Brite spark]

HRG said:

Do you mean a countersink bit? If you're trying to remove just the screw head then that's what it's called.

countersink bit is for getting the head of the screw to sit below the surface of the material

what the op wants is a damaged screw extractor

http://www.jmldirect.com/Screw-Extractor-PS5616/
(similar to the link above, think wilkinsons do jml stuff now woolies has gone)

but be warned, these things are hardened steel- if they snap there is little chance of getting the screw out with part of the extractor in place.

The other option is to drill the head off the screw, lift the decking and then either try to remove the screw with locking pliers/ mole grips etc or cut it off flush and re fix in a different position.

Edited by Brite spark on Monday 4th May 18:04

[HRG]

Brite spark said:

HRG said:

Do you mean a countersink bit? If you're trying to remove just the screw head then that's what it's called.

countersink bit is for getting the head of the screw to sit below the surface of the material

what the op wants is a damaged screw extractor

http://www.jmldirect.com/Screw-Extractor-PS5616/

Edited by Brite spark on Monday 4th May 17:59

Not necessarily, if it's into wood then it's easier to remove the head then grip the shank and remove the remainder.

[Brite spark]

HRG said:

Brite spark said:

HRG said:

Do you mean a countersink bit? If you're trying to remove just the screw head then that's what it's called.

countersink bit is for getting the head of the screw to sit below the surface of the material

what the op wants is a damaged screw extractor

http://www.jmldirect.com/Screw-Extractor-PS5616/

Edited by Brite spark on Monday 4th May 17:59

Not necessarily, if it's into wood then it's easier to remove the head then grip the shank and remove the remainder.

http://en.wikipedia.org/wiki/Countersink- my understanding of countersinking, is it a different bit you are refering to?
Surely a contersink bit for wood would be too soft for the metal of a screw head

Edited by Brite spark on Monday 4th May 18:10

[_Deano]

Brite spark said:

HRG said:

Do you mean a countersink bit? If you're trying to remove just the screw head then that's what it's called.

countersink bit is for getting the head of the screw to sit below the surface of the material

what the op wants is a damaged screw extractor

http://www.jmldirect.com/Screw-Extractor-PS5616/

Edited by Brite spark on Monday 4th May 17:59

That's the one!
Thanks

[HRG]

Brite spark said:

HRG said:

Brite spark said:

HRG said:

Do you mean a countersink bit? If you're trying to remove just the screw head then that's what it's called.

countersink bit is for getting the head of the screw to sit below the surface of the material

what the op wants is a damaged screw extractor

http://www.jmldirect.com/Screw-Extractor-PS5616/

Edited by Brite spark on Monday 4th May 17:59

Not necessarily, if it's into wood then it's easier to remove the head then grip the shank and remove the remainder.

http://en.wikipedia.org/wiki/Countersink- my understanding of countersinking, is it a different bit you are refering to?
Surely a contersink bit for wood would be too soft for the metal of a screw head

Edited by Brite spark on Monday 4th May 18:10

I'd use an ordinary steel countersink bit to remove the head.

Something like this will do

[_Deano]

HRG said:

Brite spark said:

HRG said:

Brite spark said:

HRG said:

Do you mean a countersink bit? If you're trying to remove just the screw head then that's what it's called.

countersink bit is for getting the head of the screw to sit below the surface of the material

what the op wants is a damaged screw extractor

http://www.jmldirect.com/Screw-Extractor-PS5616/

Edited by Brite spark on Monday 4th May 17:59

Not necessarily, if it's into wood then it's easier to remove the head then grip the shank and remove the remainder.

http://en.wikipedia.org/wiki/Countersink- my understanding of countersinking, is it a different bit you are refering to?
Surely a contersink bit for wood would be too soft for the metal of a screw head

Edited by Brite spark on Monday 4th May 18:10

I'd use an ordinary steel countersink bit to remove the head.

Something like this will do

How would that work?
I thought that the purpose of this bit is to allow the screw to be sunken into the wood.

Although i already have one of these in the garage, so i will give it a go; as it might save me £10.

[HRG]

A countersink bit will remove all traces of the head allowing the decking to be removed and then you can get a better grip on the shaft with Molies or pipe grips. Yes, the idea is to trash the screw if it's irretrievably damaged.

Before you go down that route though do you have an impact driver? That'll do the trick. You can also use a normal screwdriver to similar effect if it's a good one.

[Brite spark]

_Deano said:

HRG said:

Brite spark said:

HRG said:

Brite spark said:

HRG said:

Do you mean a countersink bit? If you're trying to remove just the screw head then that's what it's called.

countersink bit is for getting the head of the screw to sit below the surface of the material

what the op wants is a damaged screw extractor

http://www.jmldirect.com/Screw-Extractor-PS5616/

Not necessarily, if it's into wood then it's easier to remove the head then grip the shank and remove the remainder.

http://en.wikipedia.org/wiki/Countersink- my understanding of countersinking, is it a different bit you are refering to?
Surely a contersink bit for wood would be too soft for the metal of a screw head

Edited by Brite spark on Monday 4th May 18:10

I'd use an ordinary steel countersink bit to remove the head.

Something like this will do

How would that work?
I thought that the purpose of this bit is to allow the screw to be sunken into the wood.

Although i already have one of these in the garage, so i will give it a go; as it might save me £10.

ok fair do, that would suggest it is strong enough for the job, though I'd probably use a decent hss steel twist drill

op, this won't remove the screw like the extractor, it removes the top of the screw allowing the wood to be lifted over it but still leaving the body of the screw in place

Edited by Brite spark on Monday 4th May 18:40

[Big Al.]

Offer up a HSS twist drill to the shank of one of the screws you have already removed, then pick the next drill size up.

Load drill into drill chuck and drill in knackered screw head, the head should then fall off when you have drilled down to the shank.

Lift decking board off the remaining screw shank, when shank is exposed take a firm grip with mole grips and unwind screw.

HTH.

[Simpo Two]

Or of you don't want the decking afterwards, just go beserk with one of these: