7655 Air-leg rock drill, pneumatic rock drill, internal combustion rock drill 
 7655 air leg rock drill is a high efficiency of the drilling machines. It is widely used for blast hole drilling in rock roadway and a variety of drilling operations, is the important equipment in mines, railways, transportation, water conservancy construction and stonework project. This machine uses a wider range, the most applicable in medium hard or hard (f = 8 ~ 18) drilling horizontal or inclined horizontal or inclined direction of the blast holes in the rock, drilling depth of up to five meters. This machine can either roadway size and the short FT160A type gas leg or FT160B long-winded legs supporting, can also be installed in the car drill or drill rack to ensure good lubrication, the machine is equipped with FY200A type oiler. 
 Structural features: This machine is the form of a gas distribution bowl with valve, reasonable structure, flexible start. And has a light weight, fast drilling, low air consumption, vibration, easy operation, low failure rate and long life, parts, good economic advantages. 
 Weight 24 kg 
 Total length of 628 mm 
 Pressure 0.63 MPa, 
 Cylinder diameter of 76 mm 
 Structure of piston stroke of 60 mm 
 Drilling impact frequency ≥ 36 Hz 
 Impact energy of ≥ 65 J 
 Drilling gas consumption ≤ 80 L / s, 
 Idling speed ≥ 300 r / mim 
 Voice sound ≤ 112 dB (A) 
 Use of air pressure 0.2-0.3 MPa, 
 Gas correctional inner diameter of 25 mm 
 Conveyance to teach inner diameter 13 mm 
 Drilling diameter of 34 ~ 42 mm 
 Maximum drilling depth of 5 m 
 Shank Specifications B22, × 108 mm 
 FY200A type oiler: 0.2 L Weight 1.2 kg storage oil 
 The gas the legs FT160A type FT160B type 
 Weight of 1716 kilograms (kg) 
 Air-leg length: Maximum 3006 2526 millimeters (mm) 
 Minimum 1668 1428 millimeters (mm) 
 Advancing length 1338 1098 millimeters (mm) 
 Maximum axial thrust 2000 2000 Newton (N)