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 Metal spinning thin tube for Flutes

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Thomas Hastay
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Location : Robbinsdale MN

PostSubject: Metal spinning thin tube for Flutes   Sat May 24, 2008 6:22 pm

Metal Spinning soft metal tube over wooden "maderels" is a technique that can be used by anyone who has a standard lathe. It makes the production of tapered metal bores within the reach of the amateur hobbyist. The metal is first "annealed" or softened by heating and then quenching. Here is a simplified diagram of the technique...

http://www.engineersedge.com/manufacturing/images/metal-spinning.gif

as the metal is spun down over the wooden manderel, it hardens/tempers it for better acoustic sound. The more you deform the metal, the more times you need to anneal it though. Spinning a flute tube down 3mm-4mm is a piece of cake for an amateur. (Thicker tubing requires a heavier lathe.)

Any interest?
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Bill
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PostSubject: Re: Metal spinning thin tube for Flutes   Sun May 25, 2008 10:37 am

"Spinning a tube down"? Does that mean starting with a tube, perhaps one of those stock brass or aluminium tubes from the craft store, and reducing it around a tapered mandrel? That almost seems within my reach.

I don't have a lathe, but I've set up a jig for my power drill that almost serves as one for small things.
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Thomas Hastay
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Posts : 38
Join date : 2008-05-22
Age : 60
Location : Robbinsdale MN

PostSubject: Re: Metal spinning thin tube for Flutes   Mon May 26, 2008 6:50 pm

es bill, this is precisely what I mean. Thin brass tubing can be spun to conical bore shapes with a simple mini wood lathe. The tubing is soft, but must be heated and quenched to make it soft enough for this process.
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