Re: Thread milling

Added: You've got to have only one set of teeth left to mill the
thread. More than one, and you'll essentially have the world's
ugliest roughing mill.

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "metlmunchr" <metlmunchr@y...>
wrote:

>
> Graham, can you beat that for a quick answer to your question? It
> does work real well. I used a 3 flute tap because the core diameter
> is larger than on a 4 flute, and the tool was plenty stiff when held
> in a collet chuck as short as practical and yet long enough to reach
> the bottom of the hole.
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Graham Stabler" <eexgs@n...>
> wrote:
> >
> > Would it be possible to take a normal tap and grind away two of the
> > sets of teeth and then add some relief to the teeth remaining to
> > make cheap multi point thread mills for specific pitches? Perhaps
> > using a metal filled epoxy to fill the flutes and stiffen the
> > assembly.
> >
> > Graham