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Re: metal spinning on DIY

Original poster: "Antonio Carlos M. de Queiroz" <acmdq@xxxxxxxxxx>

Tesla list wrote: 
Original poster: Ed Phillips <evp@xxxxxxxxxxx>
"Not so difficult. I have used aluminum, copper and brass. I prefer
brass, since I can solder the two halves, and it looks better than
copper.
But aluminum is easier to work.
Antonio Carlos M. de Queiroz"
    What type of aluminum do you use and does it require annealing?  If so,
how can you do that?


I don´t know what is the type. It´s a fraction of mm thick. Requires
annealing. I heat the part with an alcohol lamp, until it is hot enough
to burn paper, and let it cool slowly. For copper and brass, I heat
until the metal starts to change color (not to red hot of something
like this, that would destroy the metal) and cool the part quickly
in water.

Antonio Carlos M. de Queiroz