The rock drill is widely used for dry drilling in the medium-hard and hard rock(f=8-18). It?s suitable for drilling works in surface mine, quarry for boulder blasting and other dry drilling working. FY200B oil reservior is matched with this rock drill to ensure the fine lubrication. Weight ≈24kg Length 604mm Cylinder dia. 70mm Piston stroke 70mm Work pressure 0.4~0.63MPa Impact frequency* ≥27HZ Air consumption* ≤55L/s Air pipe inner dia. 19mm Shank head dia 34~42mm Shank dimensions(hex?length)at0.4Mpa 22?108±1mm