1. Electric rock drill is used for drilling burst mine hole in rock. 2. It is widely used in the mine shaft excavation, road construction, water conservancy construction,metallurgy mining, rock engineering, quarry operation, basic engineering drilling reinforcement construction process. 3. The explosion-proof electric rock drill is used for drilling water injection hole, on coal seam, exploring water holes and discharging gas, also can be used for soft rock tunnel excavation. 4. They can do wet type and dry type work (equipped with twist drill rod). Drills holes horizontally forward or tilt up, only need to control the handwheel, the drill will track forward and backward automatically on the railway. Model KHYD40A KHYD75A KHYD140A KHYD155A Rated power 2KW 3KW 5.5KW 7.5KW Rated voltage 127V/380V/660V 380V/660V 380V/660V 380V/660V Rated frequency 50HZ 50HZ 50HZ 50HZ Motor speed 2814r/min 1420r/min 1440r/min 1440r/min Rock hardness f<10 f<10 f<10 f<10 Diameter of bore 35-45mm 36-45mm 45-70mm 45-80mm Depth of bore 8m 8m 20m 25m Overall Weight 42kg 75kg 110kg 125kg Overall size 570x360x300mm 720x378x436mm 950x460x430mm 950x460x430mm