I recently added an air and liquid nossle to my CNC to help clear chips when cutting metal. I am just using air so far but it is keeping my old Craftsman 20 gallon air compressor very busy. If I turn it more than half way on the compressor works non stop. It’s also having a hard time containing the moisture so it blasts it with water after a while cutting.
I think a smaller pump would have a hard time keeping up.