... 80mm (special format can be customized)Marking Speed2-4 character per second (4 # characters)Marking Depth0.01-2mm (depending on ... Range≥ 0.01mmNeedle HardnessHRC 92Max. HardnessHRC 62Air Pressure 0.2-0 .6 Mpa (industrial gas source or compressor air ... body, frame, chassis, connecting rod, engine, cylinder, and various mechanical parts, machine tools, hardware, metal pipes, gear, pump, valves, ...