Understanding the Working Principle of Drilling Machines

A Drilling Machine, also known as a Drill Press, is used to cut holes into or through metal, wood or any other materials which has the ability to withstand high magnitude drilling forces. The drilling machine uses a drilling tool, termed as Drill Bit, which has sharp cutting edges at its point. The drilling machines are categorized in 4 classes- vertical sensitive, upright, radial, and special function. Some of the drill machines which fall under these classes are Upright or Column drilling machine, Sensitive drilling machine, Gang drilling machine, Radial drilling machine, Multi-spindle drilling machine, Vertical drilling machine, Portable drilling machine & many more.


The components of a drilling machine are:

Base: The base acts as a supporting structure for the machine. It is usually made of heavy gray iron, and has slots to give support to the structures that are too large for the table.

Column: The Column is usually round structured and is made from gray cast iron or ductile iron for larger machines, or steel tubing for drill presses which are smaller in size. It gives support to the table and the top half of the drilling machine.

Table: The table is provided to move the work piece along the column. It can also be swiveled around the column in order to reach the intended working position. A large majority of worktables have slots, holes and other structures as accessories for holding the work. Some tables are also capable of being rotated around the horizontal axis.

Head: The spindle, quill, pulleys and the motor are all housed in the head of the drilling machine. The V-belt is attached to the motor driving the pulley located in the front part of the head. This in turn drives the spindle which causes the drill to operate. The speeds on a stepped V-shaped pulley drive can be altered by changing the position of belt.

Angle plates: To support the action by its edge, angle plates are provided. They consist of holes and slots to help clamp the work piece to the table and also holds it together. They also accurately align the work perpendicularly to the surface of table.

Drill jigs: Drill jigs are used when there is a need for multi-tasking. When several holes are required to be made in one particular place. It also helps in locating the work to the favorable drilling position. The drill jig is also used to guide the drill straight through with the help of drill bushings.

radial drilling machine


When the power supply is given, the spindle which is in conjunction with the motor starts to operate. The Radial arm is adjusted according to the type of operation and height of the work piece. The chuck is connected to the spindle and it holds the drill bit in its jaws. The Drill head is adjusted on to the point of application at work piece and a suitable feed is given. The drill bit then drives into the work piece very easily. When the hand wheel is rotated, the pinion which is attached to the rack also rotates which converts the rotary motion to the linear motion. This driving mechanism is called as Rack and Pinion mechanism.


The fundamental application of a drilling machine is to create holes of different shapes and size on any work piece. A number of drill machines are available in the market to perform various operations. Hand drills are used for screwing and fastening. Hammer drill is used by carpenters to drill and fix the wooden parts. Cordless drills are useful where electrical supply is not available. Milling cum drilling machine is broadly adopted in the industries where there is a requirement of mixing and grinding of solid and liquid substances. Pillar drill machine (also referred as drill press) is used in commercial applications where there is a requirement of bulk production of drilled materials in various size and shape like metal sheets, plastic, wood, glass, etc. The capacity of drill press depends on numerous factors namely- pillar diameter, spindle nose, spindle travel, spindle speed and electronic motor used in the machine.

Milling Machine & Its Benefits in Industries

To be a market leader in the industry, it becomes top most priority to understand which technology becomes a need fit to your business. You know your business needs well. You know precisely what is going to be the specific requirement at different point of time. You may know full details about the technology and arrival of new ones. Or otherwise the specialist of the same field may help you even better. But what can be done to cut the cost of the production is introducing the right machine. This also helps enhancing the benefits gained with learning from experience curve. ‘Milling Machine’ is one of the most popular and demanding machine which forms a shape to the product.

What is a Milling machine?

A milling machine is a tool consisting of cutters which have numerous functions in the metal industry. The milling machine is well known for its adjustable feature for doing a precise cut. Hence, it has become an important and advanced machine amongst the manufacturer. The idea of regulating cutters at the various range of speed to form a shape acknowledges as a deep subject which matters to those who serve as a manufacturer in the market.


Here are some of the commonly used Milling Machines:


The column is the simplest machine to understand.It merely functions with 5 basic components. They are as follows:

  1. Work table
  2. Saddle
  3. Head
  4. Knee
  5. Over Arm

It is vertically suspended tool which allows drilling of metals. The column is used to form small shapes and handy parts fitted in the car.

Bridgeport Type or Turret:

Turret or Bridgeport Type is a functional milling machine which can produce a variety of products to be used in addition to Car parts. One of the beneficial features is that it can be repositioned in accordance with the requirements.

C Frame:

C Frame is popularly known for industrial settings. With the use of Hydraulic Motor, it becomes a powerful machine.


Horizontal Machine works parallel to the ground. The object is placed on the table here. Then the object moves sideways. Thereon cutter goes ups and down.

Bed type:

As the name suggests, on the bed itself the work table is located usually.You can see the movement in a longitudinal position, a bit free movement is there.

Planer Style:

This model is also considered similar to the bed mill. For a wider range of milling actions, the planer style is used. It includes cutters and heads.

Tracer Controlled:

Based on the master machine, Tracer Controlled has the ability to reproduce the parts.It’s usually seen in the automotive industry. The specialisation of machine parts and its products becomes easier. Hence, with the major classification of Milling Machines, one can easily realise which one can be functional to their purpose.

Benefits of Milling Machines:

• The size and durable construction of the milling machine give tremendous support to handle large and heavier machine without damaging itself.
• It provides flexible computer control options for cutting purpose.
• It reduces the chances of human errors.
• It assures accurate cuts.
• Availability of customization.
• Use of multiple cutters.
• It can do multiple cuts simultaneously.

With the renewal of product ideas, the updation of production machine becomes essential. This demands in-depth knowledge of the production technique, product life-cycle, and total production cost per piece or unit wise

Conclusively, the benefits direct the proper attention to recognise what actually is needed. Moreover, the specialist enhanced with same knowledge can help you well to access the hidden benefits as well by selecting the right one.