Down Rod Drilling Machine

Drilling is basically a single-purpose machine tool as its main purpose is to make holes in the workpiece. Drilling is a cutting process that uses a drill bit to cut or enlarge a hole of circular cross-section in solid material.  There are four main methods for drilling rocks :percussion drilling, churn drilling, diamond drilling and rotary drilling.Down-the-hole drilling (DTH) essentially involves a drilling hammer at the bottom of a drill string. It relies on three elements for drilling holes: bit loading (weight), rotation and air. These active elements combine to be efficient at crushing rock.