Hi All,

I have a 6040 CNC that I want to use to mill a 2mm thick aluminium plate, 150mm x 150mm overall. I need to mill the profile, several holes and slots, the narrowest one being 2mm wide. I am using a 1mm end mill. I have used several feed & speed calculators but when I do a dry run, ie, above the workpiece, the feed speed seems very fast. The calculators give me a spindle speed of 15,000 rpm and a feed speed of 42 mm/sec. For such a job, what do you experienced guys think are good settings for feed rate and spindle speed? Yes, I have read several tutorials on milling aluminium but 42 mm/sec?

Cheers

Gary