A magnetic drill press is a portable drilling machine equipped with an electro magnet or permanent magnet base and is used for making holes in metal.
A Magnetic drill press is a machine tool fitted with a cutting tool attachment and an electromagnet, is used for drilling holes in metals. A magnetic drill press is attached with cutting tools called as a core drill, this core drill is hollow from inside but has cutting edges on the surface and on teeth.

A magnetic drill press is also called a magnetic core drilling machine, magnetic drilling machine, mag base drill, magnetic drill machine, mag base drill or mag drill.

A magnetic drill press can also perform operations like Thread cutting (tapping), Twist drilling, Reaming and Countersinking. A portable magnetic drill press makes holes in metal with the help of a special cutting tool called as core drill or annular cutter or annular core cutter.

Difference between a conventional drilling machine and a magnetic core drilling machine:
The main difference is that, unlike the conventional drilling machine, a magnetic core drilling machine is portable and flexible, it can be moved from one place to another, it can be fixed horizontally, vertically, sideways, etc. Such flexibility of working is never achieved by any other drilling machine.

Another difference is that a core drilling machine cuts only on the periphery of the hole and not all over the whole surface, hence it has to cut very little material and therefore is faster and economical. That is why under normal condition a magnetic drill press is considered to be three to four times faster than the traditional drilling machines.

The design of a magnetic drill press:
A magnetic drill press comprises of maily four parts, magnetic d´base, drill stand, motor and arbour.

Magnetic Base
The base of a magnetic drill press is equipped with a powerful electromagnet to easily clamp (adhere) the machine on the workpiece to be drilled. When energized this magnet gets strongly fixed on the workpiece locking the machine base to the metal workpiece which helps the operator to give a steady feed against the workpiece. The electromagnet plays a very important role in a portable magnetic drill press, as it helps the machine to be steady, does not let the machine dismount during drilling, can work with the machine overhead, horizontal or vertical. Generally, a magnetic drill press is used on a ferrous material directly, but it can also be used on no ferrous material like stainless steel with the help of clamping devices.

Drill Stand
A drill stand is the main body of the magnetic drill press where the electric switches for motor and magnet are mounted, magnet indicator is mounted and also PCBs are mounted. The body of the magnetic drill press holds together the motor and the magnetic base. The feed handle is also attached to the body. The body of the magnetic drill press helps the motor slide on it to get an upward and downward feed. The body of the magnetic drill press also plays the role of a handle to lift and move the machine from one place to another. The material used for the body is generally cast iron.

Motor
The motor is the main component of a magnetic drill press. It is a DC motor. The output power of the motor ranges from 800 watts to 2300 watts depending upon the power required for drilling. A larger diameter hole will require a more powerful motor. The motor used for drilling and tapping machines will also have a clock and anti-clockwise rotation option. Generally, the electronics for speed and torque control are located on the motor itself.

Arbour
An arbor also called as tool holder or chuck on a magnetic drill press is attached to the motor. It is a type of clamp used to attach the core drills. There are mainly two types of chuck available for the magnetic drill press, industrial arbor (manual tightening) and quick change drill chucks. The quick-change drill chucks are easy and fast option to attach the core drills. They do not need to tighten the screws/jaws manually. The arbor or chucks have different types of spindle holder (machine taper) like Morse taper MT 2, MT 3, and MT 4. The chuck allows different types of core drill shafts (shanks) to fit in it.

Operation of magnetic base drill press:
The magnetic drill press is meant primarily for users in the field of construction, fabrication and heavy engineering industry. These machines are ideal to be used both onsite as well as in the workshops. Magnetic drill presses are not only made for core drilling but are also ideal for twist drilling, reaming, countersinking and tapping (thread cutting). Unless you’re making blind holes or holes less than 12 mm diameter, core drilling is worthy of serious consideration, especially if your application is not under controlled shop conditions.

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