Excellent! Thanks you so much Graham.
I did a search on cutting MDF and ran into the chipload formulas.
Good stuff. Now I also understand why high rpm and slow feed are not good as they produce to much heat.
I set my spindle RPM down, ran a bit faster, and voila, it actually started chipping away and stopped pulverizing.
However, I would not have done that without the formulas and insight as the speed is rather scary now.
That little TAIG mill is flying through that stuff. I bought one of those contact free thermometers which look like a gun a couple of years ago and never really used that. Now I took it and measured the temp of the bit's shank during operation. Just for fun... I am not such a stickler usually. And.... it does show. Funny, I tended to do the wrong thing, as in high rpm low feed, as I thought it would make it easier on the cutter. Wrong. Now it's flying, cool, without squeaking which it did a bit before.
Just Great!
Thanks again!
Lemo