Type YT24 air legged rock drill Weight ¡Ö24kg Overall length 678 mm Operating air pressure 0.4-0.63 *** I***ct frequency(0.63***) ¡Ý31HZ Air-pipe bore(inner Dia.) 19 mm Water-pipe bore(inner Dia.) 13 mm Air consumption ¡Ü4.0 m3/min Drill rod trailer 22 x 108 ? mm Drill bit ?4-42 mm Type FT140BD ( short) air leg Leg length 1400mm Propulsion stroke 965 mm Weight ¡Ö13.9kg