Magnetic drilling machine

Its combination of a stable magnetic base and low RPM help resist or reduce torque forces created by large diameter bits.

Magnetic drilling machines with reversible motor and variable speed controls can also perform operations like tapping, countersink and reaming.

[1] A magnetic drilling machine with a cross table base can also perform light milling.

The drill bits used for this machines are generally made from high-speed steel(HSS) or are tungsten carbide tipped(TCT).

When energized this magnet is held on the metal work piece locking the machine base to the surface.

The body of the magnetic drill also plays the role of a handle to lift and move the machine from one place to other.

Popular forms of magnetic drilling machine include: Very light weight types magnetic drills are very popular to perform several operations where the weight of a machine to carry is a great concern like working on an electric pole, mobile tower, TV tower, bridge, etc.

Pneumatic core drilling machines are used where there is a danger of explosion or fire due to electrical sparking.

Cross-table base magnetic drilling machines can also be used for light milling operations to make oval holes or key-slots.

[4] Numerous teeth remain sharper longer than the single pointed tip of a spiral drill.