Originally Posted By: Traction
An inadequate air supply will make a lot of air tools underpowered. You need to check pressure at the gun while running. I maintain about 125 psi on my regulator, to make up for pressure drops through lines, fittings, etc. Needs to be at 90 psi+ at the tool, not the regulator.
+1. For a half inch gun 3/8" hose is a minimum, for a 3/4" gun 1/2 is minimum.