First cut in aluminium. Disaster.

[Ukmiller]

I have some end mills that are the following spec.
12 diameter 4 flute.
30mm flute length.
42 degree helix.
Solid carbide with a high hardness rating.
They are what i use for every material.
I can use them on plastic and alloy and stainless no wories.
If i am cutting an external profile in alloy i can go full depth cut and cut with the side of the cutter and cut 1mm off the profile at 3000mm/ min with coolant on.
Internal holes and pockets i just run 0.5mm cuts at high feedrate so it doesnt take long anyway.
But we dont do high volume work so thats ok to us.
Maybe if we had a high volume we would have to use specific alloy cutters to speed up internal machining