I also meant to ask what could be causing the dovetail bit to leave so much molten metal (slag?) or whatever it's called. It's like pulling teeth to get it off. The straight bit I'm using leaves a nice finish on the top . . . . .
But the dovetail bit leaves all this garbage behind . . . . . .
. . . and I slowed the feed down to .5/m but it didn't make any difference.
I will probably answer my own question and catch hell for it too, but the straight bit is Italian and the dovetail is Chinee. I guess that must be the difference. Can carbide be so poor quality as to be more like HSS?
I will get a Diablo bit tomorrow an try it but the POJ chinee dovetail bit was the only one I have with the profile I needed.