The only bits I've used that got most of the chips out of the cut were Vortex 3 flute roughers. They leave a clean top edge, too, but leave a riplled edge which you'd have to recut with a compression spiral. You might want to try a Vortex Tornado, combination rougher/ compression bit. They're expensive, though.
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Gerry
Mach3 2010 Screenset
http://home.comcast.net/~cncwoodworker/2010.html
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management) |