machining Aluminium Tips?

[dfox1787]

Feed is way too slow for that RPM imo.

Try a feed of 1000mm/min with around 12,000 rpm and an axial engagement (again, found in the 4th tab) of 0.8mm... these chinese machines are a little ropey so play around with the rpm to find one that sounds better and doesn't cause resonance in the machine.

Don't use TIAIN coated end mills in aluminium... the aluminium nitride causes the aluminium you are cutting to weld to the cutting edge. You can probably see where the coating has turned silvery already - that's your alu ending itself to the cutter.

Much better just to use uncoated carbide and a good mist coolant.

Thank you. Ill have a play with the settings. Here are my settings for the current part i was practising on.