The Drilling Machine is used for producing holes in work pieces. It is a very important machine tool which is commonly used in the workshop. The holes made may be through or blind. The common tool used in the machine is the "TWIST DRILL". The holes produced may be finished or modified by Boring, Reaming, Counterboring, Tapping or Spot Facing.
The sleeve which does not resolve carries the spindle, But may slide in it's bearing in a direction parallel to it's vertical axis. The spindle is usually vertical and work is supportable on a horizontal table.
The table is supported on an arm which is adjustable on the lower section of the column. The table is adjustable vertically to accommodate different heights of work It may be swung out of the way so that the work can be seated on the base if required. The common drilling machines maybe of the pedestal type which maybe mounted on any suitable support and are usually of small capacities and the pillar type which are usually mounted directly on the floor. The sizes of these machines are usually given in terms of the maximum diameter of holes that can be drilled with the twist drill. The size may also be expressed as a maximum distance from the center of the spindle to the nearest point on the column of the machine. For example; A drilling machine with work capacity of 400 mm diameter is called a 400 mm Drilling Machine.
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