Re: [CAD_CAM_EDM_DRO] Re: Quick Change Tooling

The "el-cheapo" method is to put the whole impact wrench on a pair of columns with a spring. To engage or disengage a collet
you pull down then hit the lever "in" or "out". When you release, the whole thing pops up off the drawbar nut.
The Kurt and others are a little more sophisticated (although still use an impact wrench) and I am not sure how they
engage/disengage.
It would be pretty easy to duplicate the cheap ones. Watch over torque-ing the threads though. Use regulated air to get the
torque down.
Note that the impact wrench we are talking about here is the small 3/8" butterfly style. Not the big-uns.

Wally K wrote:

> Hi Joe:
>
> I was thinking about building somthing like your description of the
> impact wrench quick change. In your description you said a spring is
> used to disengage the socket from the drawbar. is the mechanism used
> to engage the socket a "bendix" type or is it simpiler.
>
> Wally K.
>
> --- In CAD_CAM_EDM_DRO@egroups.com, Joe Vicars <jvicars@c...> wrote:
> > I missed most of this thread, so excuse my repeats.
> > Most of the power drawbar retrofits are nothing more than an
> impact
> > wrench mounted to the top of the machine with a spring to disengage
> the
> > socket. Real quick change spindles do not operate on the same
> principal
> > as the R8
> > Other "quick change" are collet adapters with R8 shanks. They
> are
> > quick because you don't have to mess with the drawbar once they are
> > installed. But you do have to have a spindle break and use their
> wrench
> > and collets.
>
>
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