On Wed, 2008-05-07 at 23:16 -0600, rtwas wrote:
> Hello,
> 
> 
> Jon Elson wrote:
> 
> >
> >  Remember that the tooling is a major expense on 
> >these machines, a rack of NMTB 40 holders and collets is worth a 
> >LOT more than most older machines.
> >  
> >
> NTMB 40 for cnc? I thought these were manual-only holders. I have'nt 
> heard of them
> being used for cnc use. Can you elaborate please?
> 
> Thanks.
> 
> Robert W.

I have them on my Shizuoka:

http://en.wikipedia.org/wiki/Machine_taper#NMTB_Tapers
http://www.wallacecompany.com/machine_shop/Shizuoka/00006-1a.jpg
http://www.wallacecompany.com/machine_shop/Shizuoka/00007-1a.jpg
http://www.wallacecompany.com/machine_shop/Shizuoka/

My machine uses a draw bar driven by an electric impact wrench to retain
and eject the holders. It's noisy but seems to work:

http://www.wallacecompany.com/machine_shop/Shizuoka/tool_changer_video.html

-- 
Kirk Wallace (California, USA
http://www.wallacecompany.com/machine_shop/ 
Hardinge HNC/EMC CNC lathe,
Bridgeport mill conversion, doing XY now,
Zubal lathe conversion pending
Craftsman AA 109 restoration
Shizuoka ST-N/EMC CNC)


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