Ever since I started milling aluminum with the Shapeoko and reading older forums (e.g. Practical Machinist), SFM is mentioned frequently and held in high regards as something to hold constant. But with videos from Winston Moy, John Saunders, and others either ignoring it or mentioning that it isn’t a big deal, I wanted to know if I should even care about it.
I know one should shoot for 800 SFM in aluminum with carbide but no hobby machinists seems to mention this. Does it really make a difference if I hold my SFM constant and adjust everything else? It seems like I can run fast or slow in aluminum with 1, 2, or 3 flutes, at high RPMs and low, and it doesn’t seem to really matter as long as I hold chipload constant, not SFM.