1mm end mill depth of cut in aluminium.

[Nealieboyee]

You said it all when mentioning the grade. Nobody can tell you what to use without knowing the grade and even then with small cutters, the machine stiffness becomes a large factor.

Unfortunately, it's going to be trial and error. If your machine is stiff enough and the spindle is ok on the runout plus spins fast enough then I can't see why 0.3mm shouldn't be possible with good cooling.

Thanks Jazz. Yeah was hoping someone would confirm what I thought. I'm running the spindle at 24000rpm with a more precise collet because of the smaller end mill. Flute length could be shorter but I'm working with what I have. Flooding it with paraffin ��