A process of cutting a hole of circular cross-section in solid material by using drill bit is known as Drilling. The drill bit is a rotary cutting tool which is pressed against the piece of work from the hundred to thousands of rates of revolutions per minute. This cuts the edge of the workpiece into chips from the hole as it is drilled.

A process of cutting a hole of circular cross-section in solid material by using drill bit is known as Drilling. The drill bit is a rotary cutting tool which is pressed against the piece of work from the hundred to thousands of rates of revolutions per minute. This cuts the edge of the workpiece into chips from the hole as it is drilled.