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[Technology] DIY challenge









PILTDOWN MAN

Well-known member
NSC Patron
Sep 15, 2004
18,705
Hurst Green
In theory :
First you use a centre punch to establish where the drill bit will start.
Then you use a teeny tiny drill to drill down into the shaft of the screw or bolt. Make sure you keep it at the correct angle at all times or you'll cause yourself trouble.
You then use a slightly larger drill and eat a bit more of the shaft of the screw away.
Then a bit bigger
Then a bit bigger
Until the metal shaft has been eaten away by the drill but the hole still remains untouched.

In practise:
You don't get the initial guide dent/dot central.
You drill with a teeny tiny drill bit but it's off to one side.
You increase the size of the drill and start eating into the wall of the hole.
You increase the size of the drill too much because you're impatient.
You realise the drill bit is going down the outside of the screw/bolt instead of into the shaft.
No matter what you try you can't get it to go as you want it to.
You increase the drill to the size of the screw/bolt head to drill that off.
The screw/bolt head may come off.
It doesn't come off so you get the hammer out and bash it off.
You then bash and bend the remains of the screw into the wall whilst trying not to get little bits of grit in your eyes.
You the filler over the hole.
Job done.


Left handed drill works best as well, remembering to have the drill in reverse.
 


drew

Drew
Oct 3, 2006
23,067
Burgess Hill
In theory :
First you use a centre punch to establish where the drill bit will start.
Then you use a teeny tiny drill to drill down into the shaft of the screw or bolt. Make sure you keep it at the correct angle at all times or you'll cause yourself trouble.
You then use a slightly larger drill and eat a bit more of the shaft of the screw away.
Then a bit bigger
Then a bit bigger
Until the metal shaft has been eaten away by the drill but the hole still remains untouched.

In practise:
You don't get the initial guide dent/dot central.
You drill with a teeny tiny drill bit but it's off to one side.
You increase the size of the drill and start eating into the wall of the hole.
You increase the size of the drill too much because you're impatient.
You realise the drill bit is going down the outside of the screw/bolt instead of into the shaft.
No matter what you try you can't get it to go as you want it to.
You increase the drill to the size of the screw/bolt head to drill that off.
The screw/bolt head may come off.
It doesn't come off so you get the hammer out and bash it off.
You then bash and bend the remains of the screw into the wall whilst trying not to get little bits of grit in your eyes.
You the filler over the hole.
Job done.

Or you could just get a set of these.

https://www.diy.com/departments/universal-2-piece-screw-extractor-set/1738584_BQ.prd?rrec=true
 


dejavuatbtn

Well-known member
Aug 4, 2010
7,205
Henfield

You seen the review for this?

Don't waste your time...
Bought these today to remove some screws from a fence. Unlike others I've seen online, these aren't double ended, and in practice are totally useless. Doesn't catch, even when pre-drilled, and are far too soft an alloy. Managed to just spread the screw head out even further, and if you try a burst of speed, they'll melt! I now have one with a shorn screw head wrapped around it like a hoopla, the other one seems to have lost what little thread it had. Extremely annoyed for the price they're asking.
:ffsparr:
 




Questions

Habitual User
Oct 18, 2006
24,896
Worthing
correct answer, thread closed

no workshop/garage is complete without an angle grinder . . . . I tought my lad to handle one when he was 10.

Edit . . . .theyre dirt cheap (£20-15) now and fine for occaisional jobs.

I have 3 angle grinders but am no way a tool freak. They are special tools.
 


Questions

Habitual User
Oct 18, 2006
24,896
Worthing
Just rip the ****er off with a nail bar
 


zefarelly

Well-known member
NSC Patron
Jul 7, 2003
21,824
Sussex, by the sea
I have 3 angle grinders but am no way a tool freak. They are special tools.

Indeed they are . . . . And after nearly 20 years of tuning engines, in particular cylinder heads of all sorts, air powered die grinders are the tool of KINGS!

You could get in the chancelllors wallet with the right carbide bit, whereas a typical angle grinder wouldn't get close to a major limb joint, although that would probably win you more friends.

BoT . . . This would have whizzed those screw heads off in 30s

https://www.machinemart.co.uk/p/clarke-cat130-professional-1-4-air-die-grinde/
 




Questions

Habitual User
Oct 18, 2006
24,896
Worthing
Indeed they are . . . . And after nearly 20 years of tuning engines, in particular cylinder heads of all sorts, air powered die grinders are the tool of KINGS!

You could get in the chancelllors wallet with the right carbide bit, whereas a typical angle grinder wouldn't get close to a major limb joint, although that would probably win you more friends.

BoT . . . This would have whizzed those screw heads off in 30s

https://www.machinemart.co.uk/p/clarke-cat130-professional-1-4-air-die-grinde/

This IS a cry for help isn’t it ?
 


Easy 10

Brain dead MUG SHEEP
Jul 5, 2003
61,772
Location Location
Argh. Harry Barker.
I lost count of the times I had to draw and redraw my plan for a plant label because the arrows to indicate the dimensions had poorly drawn heads.

Allegedly!

Bloody hell, I had Barker at Lower School as well, must've been around circa 1984-85.

I always remember a kid in my woodwork class (John Simmonds) fainted when we were gathered around Barker as he demonstrated something or other at the bench. He fell foward and cracked his head on a VICE that was secured to the side of the bench, then lay on the his back on the floor twitching, with a steady flow of blood leaking from a nasty gash on his forehead. Barkers reaction ?

"What the BLOODY HELL have you done to my VICE, Simmonds ??"

Wasn't you, was it ?
 


BN9 BHA

DOCKERS
NSC Patron
Jul 14, 2013
21,561
Newhaven
What is the most elegant solution for removing this immovable object?
d2f9d8811f4a9ff1d9a9cdbb20d67f7e.jpg

Just rip the ****er off with a nail bar

:lolol::lolol:
This is what I call an elegant solution.
 




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