0.4-0.63Impact energy         (J) ≥65 ≥64≥75.5≥70≥78Impact frequency      (Hz) ≥31≥36.5≥36.7≥37≥37Air consumption       (L/S) ≤67 ≤55≤83.3≤81≤88Hose size            (mm)2525252525Rork drill hose diameter(mm)34-4234-4234-4234-4234-42Rock drill hose depth   (m)55555Shank size           (mm)22x10822x10822x10822x10822x108