Sales ah Atlas YT27 rock drill YT27 Air-leg rock drill efficient light, suitable for medium hard or hard (f = 8-18) on a wet rock drilling down and tilt bore. Bore diameter of 34-45 mm, effective drilling depth of up to 5 meters. Having purged powerful blast holes, solder torque transfer characteristics superior to similar products. YT27 rock drill parameters: Model Weight KG commander mm Bore × Stroke mm Working pressure MPa impact energy J Impact Frequency HZ Air consumption I / s YT27 27 668 80 * 60 0.5-0.63 ≥75 ≥36 ≤80