Machine tool

A machine tool ispowered mechanical device, typically usedfabricate metal componentsmachines byselective removalmetal.

Examplesmachine tools are:

• lathe (work rotates, single-edge cutterfixed)
• mill (workfixed, multi-edge cutter rotates)
• drill (like mill, but optimizedmake holes)
• surface grinder
• broach
• gear shaper
• shaper
• Stewart Platform mills
• hobbing machine

Machine tools can be operated manually, or under automatic control. When operated directly by computers, theyreferredas CNCcomputer numerical control machine tools.

When fabricating or shaping parts, several techniquesusedremove unwanted metal. Among these are:

• single edge cutting tools
• multiple edge cutting tools
• grinding
• EDM (electrical discharge machining)

Several regions ofUnited States became centersmachine tool development, including Cincinnati, OhioSpringfield, Vermont.