Re: [CAD_CAM_EDM_DRO] Re: Sherline Auto Tool Changer

Hi Peter,

This is the bit I'm asking about. I'm a where how manual change millers hold
the tooling/holder in place. I have a Bridgeport type machine. The question
is how do auto-changers, when they are fully automatic, hold the tooling in
the spindle. I can change a tool in a few seconds but I have to be there to
do it. So if it is necessary for me to tighten a draw-bar why use an
auto-changer when the tooling held in a lazy-susan would do?

> The sherline tool holder simply screws into the spindle on a high
> precision thread & shoulder. There's a 3mm hole in the tool holder
> which allows you to locate in the holder to unscrew it. Sherline
> claim that as the thread and location hole for the cutter shank are
> created without removing the piece from the machine, that the
> accuracy is very high !
>
> I know that full size CNCs use a draw bar to pull the tool holder up
> against the taper and locate it onto a dog, but I am trying to think
> of a way of using the existing available stuff.
>
> Another way would be to make an adaptor to fit the Spindle and then
> make special tool holders to fit the adaptor.

Regards,

Terry