Type YT24 air legged rock drill Weight 24kg Overall length 678 mm Operating air pressure 0.4-0.63 MPa Impact frequency(0.63MPa) 31HZ Air-pipe bore(inner Dia.) 19 mm Water-pipe bore(inner Dia.) 13 mm Air consumption 4.0 m3/min Drill rod trailer 22 x 108 + -1 mm Drill bit 34-42 mm Type FT140BD ( short) air leg Leg length 1400mm Propulsion stroke 965 mm Weight 13.9kg