... 150 MPa, full angle drill, light weihgt 120kg. Hard rock super-drill is driven by air, drilling hole by ... for 360° drilling, light weight with less vibration, rock hardness can be from 150MPa to 180MPa, in 70minutes drill ... the time of rod changing and draw out the rock core), simple design can work at any narrow tunnel ... range of horizontal drilling (mm)400----1600 150MPa hard rock drill(air driven)