1.Brief introductions of KHYD75 electric rock drilling rig ·electric rock drilling rig can be fitted with drilling stand, and can be drilled horizontally or inclined upward. ·In order to prolong the service life of the drill bit and improve the working conditions of the operator, wet drilled water can be used to discharge the powder and screw blade drills can also be used for dry draining. ·In drilling operations, we only need to operate the handwheel, and the electric motor rock drilling rig can advance and return quickly. 2.Specifications of KHYD75 electric rock drilling rig Model Unit KHYD75 Rated output power of electric motor kw 3 Rated voltage of electric motor v 380/660 Rated frequency of electric motor hz 50 Rated current of electric motor a 6.8/3.9 Motor rotating speed r/min 1420 Working mode continuity Drilling speed mm/min 320 Rig return speed m/min Borehole diameter mm 42(rockï¼? Hardness range protodikonov`s scale of hardness f