Process Drilling
Drilling is widely used for making holes.

In drilling the cutting tool is rotated (the speed) and moved (the feed) along its rotating axis. A drilling tool normally has two cutting edges placed at an angle at the end of the drill. A normal point angle for steel drilling is 112 degrees.
Danish Name Boring
Category Reducing processes, Cutting
Materials Metals Plastics
Competing processes Punching (in sheet metal)
Laser beam cutting (in sheet metal)
Milling (for flat bottom holes)
Additional info Typical drilling operations are drilling, tapping (making threads), counter boring, counter sinking (making a chamfer), reaming (hole finishing) and spot facing. A boring operation is an enlargement of a hole often using a single point cutting tool.
Keywords Hole
Photo Thomas Nissen (Computer graphics)
Copyright © 1996-2006 Torben Lenau
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