7655-type air-leg rock drill Features: This machine is equipped with a gas valve in the form of the use of the bowl, reasonable structure, flexible start. And a light weight, drilling speed, low consumption, little vibration, easy operation, low failure rate, long life components, good economic returns. 7655-type air-leg rock drill the machine parameters: machine weight 24 kg total length of 628 mm 0.63 MPa using a pneumatic cylinder piston diameter 76 mm stroke 60 mm rock structure impact frequency ≥36 Hz ≥65 J impact energy drilling gas consumption ≤80 L / s idle speed ≥300 r / mim my voice ≤112 dB (A) Air pressure 0.2-0.3 MPa gas teach teaching water pipe diameter 25 mm internal diameter 13 mm hole diameter 34 ~ 42 mm maximum drilling depth of 5 m shank specifications B22 × 108 mm FY200A type oiler: Weight 1.2 kg fuel capacity 0.2 L gas leg FT160A type FT160B type Weight 17 16 kilograms (kg) air leg length: maximum 30,062,526 millimeters (mm) minimum 16,681,428 millimeters (mm ) advance length 13,381,098 millimeters (mm) Maximum axial thrust 20,002,000 Newtons (N)