What type of minimill is it? You should be able to remove a lot more material than that, even on a minimill. I'm running a stock Taig + flood coolant and am taking 1/4" HSS high helix 2 flute at 4300 RPM 0.100" deep 50% chip load at 20 IPM. For 100% chip load I slow it to 10 IPM.
The thing you have to worry about with the minimills is that the motor doesn't supply enough torque to power through a heavy cut. And the rigidity of a minimill is a lot less so your cuts will start to get sloppy if you go too fast or heavy. What RPM are you running?
Edit: fixed RPM speed mistake.
Last edited by warpedmephisto; 03-25-2006 at 03:55 PM.
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