Re: metal spinning success

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "colin.heath4 by way of Terry Fritz <teslalist-at-qwest-dot-net>" <colin.heath4-at-ntlworld-dot-com>

hi antonio,
                 i have only held the piece with a bolt for ease just to
practise my spinning. i will once i have made the arbours hold it clamped as
you say so i can make complete spheres.
i like the idea of soldering copper spheres together
im in the process of making the toroid forms at present ready to start my
first spun toroid
cheers
colin

----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, March 03, 2003 2:29 AM
Subject: Re: metal spinning success


 > Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz
<teslalist-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>
 >
 > Tesla list wrote:
 >
 >  > Original poster: "colin.heath4 by way of Terry Fritz
 > <teslalist-at-qwest-dot-net>" <colin.heath4-at-ntlworld-dot-com>
 >  >
 >  > hi all,
 >  >          iv just started metal spinning and have put my first attempt
on my
 >  > web page. soon i hope to be doing toroids with more practice although
its a
 >  > lot more complex than turning a half sphere
 >  > the pics at
 >  >
 >  > www.geocities-dot-com/colinheath2002/metalspinning.html
 >
 > Why the hole in the center? It's easy (after some experience...) to fix
 > the material by pressure only and make complete half spheres.
 > Take a look at my metal spinning page:
 >
 > http://www.coe.ufrj.br/~acmq/spinning
 >
 > I have used this method to make spheres and rounded disks with up to
 > ~15 cm of diameter. Presently, after getting experience with aluminum,
 > I only use copper, or better, brass. The half balls can then be soldered
 > instead of glued. To solder, I first apply some solder to the internal
 > edges of the half balls, and then mount the ball in the lathe, pressed
 > between wood blocks. I turn the lathe slowly while applying a heavy
 > soldering iron to the joint until the solder starts to leak. Some
 > polishing, and a perfect sphere is obtained.
 >
 > Antonio Carlos M. de Queiroz
 >
 >
 >