I'm not going to quote you cutting tables or chip loading etc, but I can tell you what I have found works.
I've done some engraving on 6061 aluminium with a 2.0mm endmill with 0.25mm per pass @ 100mm/min (2000 rpm). The problem with aluminium is it tends to weld itself to the cutter, leading to a rough finish and ultimately a broken cutter.
The above is probably conservative, but I only had the one endmill left, and couldn't afford a broken endmill. I've been using a cheap alternative to WD40 to lubricate and blow out the chips after every pass. I've also using kerosene 10:1 with motor oil, and turpentine neat, both are a little hard on the nose after a few hours though.
I do a lot of profiling in aluminium using 3 flute carbide bits, 1.0mm per pass @ 150mm/min (2000 RPM spindle) I can cut all day without a broken bit.
Try taking a shallower cut 0.2" = 5mm you shoud be looking at a cut in the order of 30% of the cutter diameter, so I'd be looking at 0.015" per pass at say 3 IPM @ 2000 RPM as a start. You'll need to get those chips out of the trough left by each pass too, either by blowing them out or washing them out with some form of flooding.
Hope this helps