GM-20A Engineering drill

GM-20A Drill, a light weight big-hole engineering drill, is im0proved and designed based on GM-20 drill. The new type drill unites the tower and machine body. This type of drill integrates the drill's advantages of the type's turn plates, the power heads and the main shaft drills. The drill has such advantages as high drilling efficiency and precision, powerful torque, wider ranges of speed and smaller coefficient of oversize of hole. It can drill in the ways of forcing feed or reducing bit load drilling by hydraulic system. Oil cylinders of the drill can raise or pull down the tower safely and quickly, move and fit the hole position conveniently. After moving the machine, the bit of two meter diameter can be directly lifted or run in. height of the tower is ten and five meters, which can directly pull down the steel cages. The assistant hoist's capacity is strong. The drill is equipped with step device as to fitting the hole position conveniently. The control handlebars are collected so easy to operating. The drill can be used in the drilling technologies of normal or reverse circulation in the quaternary period gravel or hand rock ground. The drill can be mainly used for big-hole grouting pole holes drilling of high building, port and bridge. 　　SPECIFICATIONS 　Drilling capacity 　Drilling diameter 　2.0m 　Drilling depth 　80m 　Speed 　Positive 　10.4,19,31,49.3,76.5r/min 　Negative 　11.8r/min 　Max.torque 　40kN.m 　Max.pressuring force 　100kN 　Max.lifting force 　120kN 　Feeding stroke 　400mm 　Main hoist capacity(single rope) 　45kN 　Assistant hoist capacity(single rope) 　30kN 　Effective height of drill frame 　10.5m 　Specified load of drill frame 　180kN 　Power 　45kW 　Dimensions(L×W×H) 　5760×3000×11000 mm 　Weight(with power unit) 　12500 kg