Re: [CAD_CAM_EDM_DRO] Re: Sherline Auto Tool Changer

there is also an intensifier to magnify the clamping force of the spring
stack ,like this un
http://www.ott-jakob.de/e/spk.htm
a search around will turn up the ott-jakob catalogs with many more cutaway
drawings showing the spindle inside contour for the gripper and all that

the specs for the steep machine tapers (3.5" taper/ft ) goes all the way
down to a 5 taper with a 1/2" gage line dia ,for the Sherline you might
be able to fit a new spindle for 10 taper holders with itty-bitty
retention knobs ,Schaublin makes ISO10 taper holders ,dont know about
the price on them but I'm sure they are gona be up there ;)
http://www.schaublin.ch/e/e-produits.htm

Brian
--
"Nemo me impune lacesset"

On Friday 24 January 2003 06:37 am, "ballendo wrote:
> Terry,
>
> Most fully automatic changers use a similar technique.
>
> Tools are held in vee-shaped non locking single taper holders. There
> is a retention knob at the top of the holder, which is the small end
> of the vee shape. Fingers inside the spindle are designed to capture
> this knob and pull it upward (often using belleville washers for
> the "drawing in" force). The interior of the spindle is shaped so
> that thes fingers lock in a failsafe way (as long as the retention
> knob doesn't break of where it screws into the holder... Yes, it
> happens).
>
> To change tools, hydraulic or air pressure is used to compress the
> belleville washers, which drops the fingers a bit, which allows them
> to come out of the failsafe recess, which lets them release the
> retention knob, which allows the holder to drop out (into a
> waiting "transfer arm", or into the lazy susan itself.
>
> Hope this makes sense,
>
> Ballendo
>
> P.S. Do a search of "CAT 40 holder", to see one of these holders