Originally Posted by
dingo0722
350 RPM. I am way above that and that could be my problem. I am running around 1200 at 2.5IPM.
that is certainly your problem , you also need to uphold a heavier chip load or your going to burn up and dull your tool . for that type of material you would be best off using coated carbide endmills or better yet coated carbide variable flute end mills , you'd be able to run at much higher speeds and feeds with less tool wear and less deflection
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