RE: [CAD_CAM_EDM_DRO] power chucks, bar feeders etc

I, inadvertently, over-dissasembled a Herbert 2D collet chuck whilst
changing a collet the other week. It's a fairly good arrangement with a
pnematic release up close to the collet.
Will a collet do the job for you or do you need something with the range of
a typical 3 jaw?
PK

> -----Original Message-----
> From: CAD_CAM_EDM_DRO@yahoogroups.com
> [mailto:CAD_CAM_EDM_DRO@yahoogroups.com] On Behalf Of Doug Pfaff
> Sent: Saturday, 3 June 2006 10:07 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: Re: [CAD_CAM_EDM_DRO] power chucks, bar feeders etc
>
> Are you going to be doing any drawings for this project? If
> yes, I'd be interested in a copy of them.
>
>
> Doug Pfaff
>
> --- Graham Stabler <eexgs@...> wrote:
>
> >
> > I'm just wondering if anyone knows much about the operation of the
> > typical power chuck?
> >
> > I'm mentally designing a small swiss-style lathe and I
> can't work out
> > how to automate the rear chuck, it needs to be able to grip and
> > release bar stock at will even at low speeds (i.e.
> > no centrifugal chuck).
> >
> > I've seen wedge based chucks mentioned but you only seem to
> get to see
> > the outside of commerical ones.
> >
> > My only real idea has been a spring loaded collet chuck
> with springs
> > to keep the chuck closed on the bar stock and an external pneumatic
> > mechanism to release it when required.
> >
> > Only minimal accuracy is required in terms of centering so I feel
> > there must be some neat and dirty solutions out there somewhere.
> >
> > Graham
> >
> >
> >
> >
> >
> >
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>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
> aol://5863:126/rec.crafts.metalworking or go thru Google.com
> to reach it if you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider
> this to be a sister site to the CCED group, as many of the
> same members are there, for OT subjects, that are not allowed
> on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY
> POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO
> EXCEPTIONS........
> bill
> List Mom
> List Owner
>
>
> Yahoo! Groups Links
>
>
>
>
>
>