The drilling is a Usinage consisting in making a hole in a part. This hole can cross the part right through or not to emerge.

This hole can be carried out by a Foret on a Perceuse, by a wick on a crankshaft, by cutting between a punch and a die, by electroerosion…

This hole can be used to make pass a part (a tree, a tube…), a fluid, it can be tapped to receive a Vis…

Form drilling

• cylindrical emerging;
• cylindrical one-eyed;
• countersunk;
• spangled;
• truncated;
• staged.

Homonymy

Drilling is also the fact of practicing a hole in the skin to fix a jewel at it, to see the article Piercing .