Specifications KHYD electric rock drill : 1good quality . 2it is suitable in drilling rock or coal mine . 3 good performance for price ratio KHYD electric rock drill : Feature : 1, The KHYD electric rock drill is suitable in drilling rock or coal mine use and matched with the scaffolding ,it also called scaffolding rock drill ,it can drill in level ,tilt upward ,or vertical upward direction . 2,In order to prolong the service life of the drill and improve working conditons of the operator . we can use wet type drill to remove the powder by water , we can also usd spiral leaf pipe dry type drill to remove the powder . 3,when wroking we can simply manipulate the handwheel .the drill could promote and rapid return on its own . 4,the drill can matched with 80 diameterspiral drill pipe ,34 diameter round drill pipe ,pyramid drill bi Specification Item Rock diameter mm Diameter of coal seam mm Depth of rock m Depth of coal seam m Speed r/min powerkw weight kg KHYD 40 42 45-60 5 20-60 2814 2 40 KHYD 75 42 45-80 10 30-80 1420 3 75 KHYD 140 42-80 80-100 20 30-80 1440 5.5 140 KHYD 150 42-80 80-120 25 40-100 1440 7.5 150