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Author Topic: K&S tubing  (Read 1420 times)

Norman Castle

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K&S tubing
« on: July 02, 2016, 01:11:18 PM »

Can anybody please tell me which size K&S tubing I need to make hinges with 18SWG piano wire?

Not really fussed if it's ally or brass.
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derekwarner

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Re: K&S tubing
« Reply #1 on: July 02, 2016, 10:52:47 PM »

Norman....when you do the simple calculations, you will see the nomination of #18 gauge piano wire @ 0.048" diameter is not a good selection for 1/16" OD x 0.014" wall, nor 3/32" OD x 0.014" wall K&S brass or copper tubing........... Derek
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Derek Warner

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Kipper

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Re: K&S tubing
« Reply #2 on: July 02, 2016, 11:01:28 PM »

You could try these people, they do 'needle tube'. http://www.graysofkilsyth.com/salmon-needle-tubes.htm

The 1.8mm o/d tube may well be about 1.3mm internal, which would just fit your 18 piano wire.
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derekwarner

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Re: K&S tubing
« Reply #3 on: July 03, 2016, 01:35:16 AM »

Norman......just thinking outside the square.......

You could consider 1/16" OD [0.0625"] K&S brass round stock with K&S 3/32" OD brass tubing
These two sized elements provide a reasonably firm telescoping tolerance and both suitable for soft or silver soldering

The 1/16" OD brass material is only approx. 0.014" larger than your #18 gauge wire

Derek
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Derek Warner

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Norman Castle

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Re: K&S tubing
« Reply #4 on: July 03, 2016, 10:59:08 AM »

Got there in the end ...

K&S 5/32" nominal ally tube + 18SWG piano wire makes me a satisfactory hinge  :-)
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Norman Castle

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Re: K&S tubing
« Reply #5 on: July 03, 2016, 03:00:42 PM »

Just realised I typed 5/32" instead of 3/32" ...  :embarrassed:
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Norman Castle

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Re: K&S tubing
« Reply #6 on: July 04, 2016, 12:56:44 PM »

And I now know that brass tubing in SWG sizes from 20 up to 6 is readily available  :-)
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