RE: [CAD_CAM_EDM_DRO] Automatic or easier tool changes for R8mills ?

Did these systems use a keyed collet or was it keyless ? An unkeyed
system, like a straight shank would be pretty easy to change tools with,
provided one can automate the drawbar.

Kim

On Thu, 2003-11-06 at 14:38, Carlos Guillermo wrote:
> The system Mike describes is also used on old Defiance VMC's and
> Light Machines' Benchman VMC's.
>
> Regards,
>
> Carlos Guillermo
> VERVE Engineering & Design
>
> -----Original Message-----
> From: Mike Gann [mailto:mikegann@...]
> Sent: Thursday, November 06, 2003 1:21 PM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: RE: [CAD_CAM_EDM_DRO] Automatic or easier tool changes
> for R8mills ?
>
> It attached with threads. Roland made his own tool holders for the
> different
> sized endmills, center drills, drills, etc.
> The OD of these holders were 3/4" if I remember right and they had
> a larger
> OD down toward the tool end. He then had this lever/cam operated
> drawbar
> with a 3/4" R8 collet in the spindle. He could then loosen the
> draw bar,
> remove the current tool, slide in the new tool (with a positive
> stop against
> the larger OD of the tool holder and the collet), then flip the
> lever to
> engage the collet. The article indicated this setup gave good
> repeatability
> on tool lengths.
>
> The tool holders use the same basic shape as the ones Les Watts
> has on this
> page:
>
> http://www.lmwatts.com/forsale.html
>
> If I can find the issue I will let you know.
>
> Mike
>
>
>
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Kim Lux <lux@...>