On Thu, 4 Oct 2007 05:11:23 -0500, "Karl Townsend"
wrote:

...
We specialize in metal spinning for more info:
www.debcomachinery.com
Daveb

I went through your web site, watched your video, very interesting. Couple
of questions.
How are you quickly chucking the part?
Tell me more about the tool that's contacting the metal to spin.

I doubt that I ever do it, but it looks like most CNC lathes could be easily
modified for spinning, at least for HSM type runs.

Karl


The part (disk) has a hole in the center that locates over a pin on
the ejector and then the tailstock is closed.

Most machines have a centering device (hydraulic) the you set the disk
on then it extends upwards and the tailstock is then closed.

The tool is just a heat treated steel with a radius and a relief with
a bearing in the center.

When you do large diameters (as in the video) you see the backup
roller that extends out on a cylinder and as the part is being spun is
is pushbacked this is to keep the part from distorting or
bottlecapping.

Here is a good video we made:

http://s32.photobucket.com/albums/d1...nt=Spinvid.flv

Regards
Daveb