Drilling tools, drilling, drilling machine, for causing the hole in the workpiece or rocks. Drill is a tool for drilling or other masonry materials in stone, or used to drill holes explode. Commonly used mainly twist drill, flat drill, center drill, deep hole drilling and core drill.

Drill is how does it work? When digging work, drill around the vertical shaft is rotated while axial movement. Soil is cut in torque and axial force drill role is destroyed in the extrusion and centrifugal force and pound Blades broken loose, pressed against the pit wall forming Chieftains, while along the pages elevator to the surface. When the Chieftains movement to stop at no pit wall, due to the centrifugal force pulverizer was thrown around the pit, to complete the digging process.