Re: Thread milling

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