Countersinking
Countersinking creates a V shaped recess near the surface of a hole.
Countersinking is often used to recess a flat head screw or to chamfer hole edges. The process of countersinking is usually applied to round holes.
Materials compatible with countersinking include almost any hard material including metals and hard plastics. The tooling used for countersinking are generally stock items unless unusual angles are required.
The process of countersinking is often done on CNC milling machines, lathes and drill presses.
