Well I have read a number of posts in regards to cutting aluminum. I tried it for the first time today. I was asked by a friend to cut three holes in .5 aluminum to a total of .1875 by 1.75 inches in diameter. I cut at .005 per pass. I didn't want to use any coolant since it would make a mess. I used a .75 diameter Hersaf cutter. I cut at 5000 rpm and a rate of .5 IPM. We didn't use any dust collection since I figured the cutter would expel most of the chips. It absolutely cut like butter!!! No heat what so ever and we both were super pleased. Just wanted you to know how pleased I was!!!