Here are cutting speeds, milling is second table down, calculator below.

http://littlemachineshop.com/Referen...tingSpeeds.php

It suggests 1600 rpm for 10mm in aluminium. Personally I'd go for about half that. If the suds gets diverted for a moment by a fixing bolt, I prefer it if the tool doesn't go red hot :whistling:

My mill came with a 2hp motor but no way on God's green do I want to put anything like that down a small cutter, it's just too much. I replaced it with a 1hp on a digi phase inverter and I never work it hard.

How noisy should it be? Any loose fittings on a bench mill will rattle. The cutter should make cutting noises, if it becomes noisy that usually means you've lost the tool tip.