7655D Type Air-leg rock drill is a high efficiency drilling machines. 7655D Type Air-leg rock drill is widely used in a variety of rock heading and blast hole drilling drilling operations are mining, railways, transportation, water conservancy construction and other stonework projects important equipment. 7655D Type Air-leg rock drill using a wider scope, the most suitable in hard or hard (f = 8 ~ 18) on a horizontal or inclined rock drilling horizontal or inclined direction blasthole drilling depth of up to 5 meters. 7655D Type Air-leg rock drill according to both the size and FT1160A roadway type short air leg or FT160B Long legs supporting the use of gas, can also be rack mounted drill rig or drilling work in order to ensure good lubrication, 7655D-type air-leg drilling machine is equipped with FY200A type oiler. Applications mainly used with mining and drilling operations in the roadway excavation, but also railway, water conservancy construction and defense of an important tool in rock engineering. Product features with the use of low pressure, low air consumption characteristics. Is a classic pneumatic rock drill 7655 improved replacement. Model 7655D length mm 668 Weight kg 24 shank size mm H22 × 108 ± 1 mm 34-42 hole diameter piston stroke piston diameter mm 70 mm Air Consumption L / s ≤52 impact frequency of 70 Hz ≥31 pressure 0.5MPa Conditions revolutions r / min 250 pipe diameter mm 19 product code?