Hi,
Disagree.Many say that air cooling is the best way to go even better then flood.
Particularly with plastics, but any material that is prone to sticking to the tool, say aluminum, the real game changing solution is to flush the chips away from the cut-zone. Lubrication and cooling is nice,
but most importantly clear the chips so they don't get re-cut.
When a chip is cut it gets hot, well at least warm, as a good fraction of the energy of cutting has gone into the deformation of the chip. Lets say the temperature of the base material is T0 then the
temperature of the chip is T1 and the difference is say 200C. If that chip get recut then its temperature will be T2 and will be 400C higher than T0,
and if it gets cut a third time T3=600C and so on. Very soon the chip or fragments of it a damned hot and just set to stick to the tool. If you flush the chip away so that it does not get
re-cut then that temperature rise is insignificant.
For the purpose of moving a chip from the cut-zone a fluid is way more viscous and way heavier than an air blast. If the velocity of the air blast is high enough then it too will move the chip. Any shadowing
of the air jet by the tool or base material will reduce the effective velocity sharply.
Both will work but air blast requires very much more precise control to be effective. Find rcaffins posts about it, he does it with air blast and described the results.
Craig