Pillar drills (also referred to as drill press machines) are versatile machines that can be used on a wide range of materials where single hole drilling is required. The head is lowered vertically and plunges into the material by means of a hand lever and the table can be adjusted to suit varying sizes of material. The larger version of the machine drill is called the pillar drill. This has a long column which stands on the floor. This can do exactly the same work as the bench drill but because of its larger size it is capable of being used to drill larger pieces of materials and produce larger holes. Drilling Machine has based upon the principle that the rotating edge of the tool exerts a large force on the workpiece and holes are being created in the workpiece. The material is removed from the workpiece by the shearing and extrusion process.