Material source needed

This topic has 38 replies, 19 voices, and was last updated 11 April 2016 at 18:28 by bugbear6502.

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31 March 2016 at 16:48 #232698
Speedy Builder5
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@speedybuilder5
Someone make this guy a small cutter – its quicker than posting replies. I would, but by the time it came from France, he would have got it out anyway. Dimensions – I/d 0.09" and O/d as small as it looks possible. Then Mr Bugbear, once the screw is removed, fill with sawdust and superglue or wood filler and 'Bob's yer Uncle'
BobH
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31 March 2016 at 16:53 #232699
Ed Duffner
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@edduffner79357
How about a TRS jack plug shaft? 1/4" 1/8" 3/16" etc.

Ed.
31 March 2016 at 17:55 #232706
Bazyle
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@bazyle
How about spark eroding it out – the heat might free it up anyway.
31 March 2016 at 19:06 #232715
mike T
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@miket56243
How would you do that Bazyle? It's in wood !!!!!
31 March 2016 at 19:21 #232718
Frances IoM
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@francesiom58905
maybe it’s an electric guitar!
31 March 2016 at 22:55 #232743
mike T
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@miket56243
At least that should help.

Edited By mike T on 31/03/2016 22:56:17
31 March 2016 at 23:27 #232747
HughE
Participant
@hughe
What about these

http://www.highlandwoodworking.com/set3hollowscrewextractors.aspx

Just made one for 8 guage screws but i have a lathe which helps
1 April 2016 at 09:24 #232770
bugbear6502
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@bugbear6502
Posted by HughE on 31/03/2016 23:27:21:

What about these

http://www.highlandwoodworking.com/set3hollowscrewextractors.aspx

Just made one for 8 guage screws but i have a lathe which helps

Yes, those are the larger (see Stewmac) commercial product. They're also in the USA, and I'm in sunny Norfolk.

I have a box of cheap (£3.99 for 120) roll pins coming, and a friend just came into work with a couple of feet of scrap stainless steel aircraft fuel line.

BugBear
1 April 2016 at 17:14 #232834
bugbear6502
Participant
@bugbear6502
Fuel line turns out to be really well annealed so you can bend it;

I have made a prototype hole saw; a friend gave me some scrap engine fuel line, which turns out
to be well annealed (so you can bend it) steel. Easy to file.

The OD is 5.5mm, I don't know the ID.

I filed 5 teeth around the circumference, with each tooth face on a radius.

On trial, the problem (shared with the commercial versions?) is that you have a saw with no means of removing the sawdust, so you have to keep withdrawing the bit to brush dust off the bit, and to (try to) blow out the hole.

So I returned to my teeth filing, and with the tube raised high in the vice, used a 45 degree slope to make a VERY large gullet on each tooth for the dust to go in. The dust still has no means of actual escape, but the teeth hold more now. This seems to work OK.

BugBear

PS Macro photography makes your filing look awful!

Edited By bugbear6502 on 01/04/2016 17:14:34
2 April 2016 at 00:49 #232890
peak4
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@peak4
Posted by bugbear6502 on 30/03/2016 13:42:51:

I was considering recycling the telescopic aerial from an old radio (chrome plated brass).

BugBear

If you have a military surplus dealer round your way, try sections of tank/Landrover radio aerials; they are made of painted, copper plated, spring steel tubing, rather than chromed brass.

Edited By peak4 on 02/04/2016 00:51:25
2 April 2016 at 01:02 #232893
MW
Participant
@mw27036
Looks like you made a decent job of it. Well done.

Michael W
2 April 2016 at 07:54 #232898
bugbear6502
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@bugbear6502
Posted by peak4 on 02/04/2016 00:49:36:

Posted by bugbear6502 on 30/03/2016 13:42:51:

I was considering recycling the telescopic aerial from an old radio (chrome plated brass).

BugBear

If you have a military surplus dealer round your way, try sections of tank/Landrover radio aerials; they are made of painted, copper plated, spring steel tubing, rather than chromed brass.

How interesting – thank you.

BugBear
4 April 2016 at 08:45 #233187
bugbear6502
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@bugbear6502
In case anybody else is looking for materials, I can say that the fuel line is probable just mild steel,is super-annealed, with an OD of 6mm and ID around 3.7mm.

BugBear
11 April 2016 at 18:28 #234198
bugbear6502
Participant
@bugbear6502
I was waiting for delivery of a box of mixed roll pins.

Waited and waited. Went to eBay to check my order, and chase the seller.

Yep – still in my Watch list.

They arrived today; for anyone following along, I can confirm that they're certainly harder than my fuel line, but still eminently soft enough to file, so I won't need to follow up my musings on gas-hob annealing.

BugBear
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