Types of a drilling machine

Types of a drilling machine

Drilling machine 0 Comment

Drilling machines or drill presses are one of the most common machines found in the machine shop. A drill press is a machine thatturns and advances a rotary tool into a workpiece. The drill press is used primarily for drilling holes, but when used with the proper tooling, it can be used for a number of machining operations. The most common machining operations performed on a drill press are drilling, reaming, tapping, counterboring, countersinking, and spotfacing.
There are many different types of drilling machines, but most drilling machines will fall into four broad categories: upright sensitive, upright, radial, and special purpose.


Figure 1 Upright sensitive drill press

This drilling machine employs the use of a belt drive spindle head. The method of feeding this machine into the workpiece is by hand only, thus the name upright sensitive. This set-up is actually an advantage because the operator can literally feel the cutting action of the tool. There are two orientations of this machine- the bench style and the floor style. The upright sensitive drilling machine is recommended for moderate-to-light duty work.  Hand feeding the tool into the workpiece allows the operator to “feel” the cutting action of the tool. The sensitive drill press is manufactured in a floor style or a bench style.


The upright drill press (Figure 2) is a heavy duty type of drilling machine normally incorporating a geared drive spindle head. This type of drilling machine is used on large hole-producing operations that typically involve larger or heavier parts. The upright drill press allows the operator to hand feed or power feed the tool into the workpiece. The power feed mechanism automatically advances the tool into the workpiece. Some types of upright drill presses are also manufactured with automatic table-raising mechanisms.

Figure 2 Upright drill press


A radial drilling machine or radial arm press is a geared drill head that is mounted on an arm assembly that can be moved around to the extent of its arm reach. Themost important components are the arm, column, and the drill head. The drill head of the radial drilling machine can be moved, adjusted in height, and rotated. Aside from its compact design, the radial drill press is capable of positioning its drill head to the work piece through this radial arm mechanism.

This is probably one of the reasons why more machinists prefer using this type of drilling machine. In fact, the radial drilling machine is considered the most versatile type of drill press. The tasks that a radial drilling machine can do include boring holes, countersinking, and grinding off small particles in masonry works.

Figure 3 Radial arm drill press


Special Purpose Drilling Machines can drill holes of different diameters ranging from 1mm to 40.00mm in Steel, cast iron, non-ferrous material at a time. The accuracy of location and size is ensured by providing proper jigs and clamping fixtures. Machines can drill holes in different planes. Please note that these machines are made to order. Final features and scope of supply is decided after discussions with clients.


· Feed -Hydraulic / Hydro pneumatic / servo motor

· Manual / Motorized lubrication.

· Coolant arrangement with pump

· Control panel wit PLC

· Two axis / three axis drilling possible

· Multi spindle drilling in 2/3 axis machines

· High productivity machines

· High quality with repetitive accuracy

Gang Drilling Machines

Figure 4 Gang drill press

The gang style drilling machine (Figure 4) or gang drill press has several work heads positioned over a single table. This type of drill press is used when successive operations are to be done. For instance, the first head may be used to spot drill. The second head may be used to tap drill. The third head may be used, along with a tapping head, to tap the hole. The fourth head may be used to chamfer.

Multiple Spindle Drilling Machine

The multiple spindle drilling machine is commonly refered to as a multispindle drill press. This special purpose drill press has many spindles connected to one main work head (Figure 5).
All of the spindles are fed into the workpiece at the same time. This type of drilling machine is especially useful when you have a large number of parts with many holes located close together.

Figure 5 Multispindle drill press

Micro-Drill Press

The micro drill press is an extremely accurate, high spindle speed drill press. The micro drill press is typically very small (Figure 6) and is only capable of handling very small parts. Many micro drill presses are manufactured as bench top models. They are equipped with chucks capable of holding very small drilling tools.

Figure 6 Micro drill press

Turret Type Drilling Machine

Turret drilling machines are equipped with several drilling heads mounted on a turret (Figure 6). Each turret head can be equipped with a different type of cutting tool. The turret allows the needed tool to be quickly indexed into position. Modern turret type drilling machines are computer-controlled so that the table can be quickly and accurately positioned.


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