Re: power chucks, bar feeders etc

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Paul Kelly" <tech@...> wrote:

>
> http://www.caswa.com/collet.jpg
> Not really related to what you're doing (it's going to be an ATC

spindle)

> but it demonstrates one way of keeping a collet closed.
> Yours would be bigger and the draw bar would be hollow (and probably

screw

> onto the outside of the collet like the 5C closers do).The assembly

could be

> as short or as long as you want.
> That stack of Bellville washers can generate a prodigious amount of

closing

> force..
> Add a thrust bearing to allow a pneumatic arm to open and close the

thing

> while it's spinning. You get the idea.
>
> PK

Food for thought thanks, but its OK to stop it during opening and
closing at least for my needs. The Belleville washers are such a neat
item it seems almost inevitable they should be used.

Graham