... # characters)Marking Depth0.01-2mm (depending on hardness of material)Marking Accuracy4μmImpact Frequency250 times/secondClick Frequency300 ± ... ) 320 mm * 760 mm * 420mmNeedle Pitch2mm-3mLifting Height of Needle Pitch0-350 (desktop type), 0-20 mm (portable ... body, frame, chassis, connecting rod, engine, cylinder, and various mechanical parts, machine tools, hardware, metal pipes, gear, pump, valves ...