Study of Operations Performs by Dril Machine

Reaming:
It is the operation of sizing and finishing a hole by means of a reamer having several cutting edges.
Boring:
It is the operation of enlarging a hole by means of an adjustable cutting tool with only one cutting edge.
Counter Boring:
It is the operation of enlarging the end of a hole cylindrical, in order to accommodate the screw head so that it does not protrude outside.
Counter Sinking:
It is the operation of a cone- shaped enlargement of the end of a hole.
Spot Facing:
It is the operation of smoothing and squaring the surface around a hole, as for the seat for a nut or the head to a cap screw.
Tapping:
It is the operation of forming internal threads by means of a tool called a tap.

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