3 axis machining involves a workpiece in a fixed position while the cutting tool operates along the X, Y, Z plane to cut away material. 3-axis machining is most suitable for parts that do require a lot of depth and detailing.

4-axis machining adds movement of the cutting tool and allowing rotation around the X axis. As a result, there are 4 axes X, Y, Z and A rotating around the X axis. The majority of 4 axis CNC machine tools allow the workpiece to rotate, which is called b-axis, so the machine can act as both milling machine and lathe.

Multi-Axis Milling is a manufacturing process made up of tools moving in four or more directions used to manufacture parts out of metal or other materials by milling away excess material using water jet cutting or by laser cutting.

CNC milling (Computer Numerical Control Milling) is a machining process which utilizes computerized controls and rotating cutting tools to remove material from the workpiece to produce a specific product or part. The process is suitable for machining materials like metal, plastic, glass, and wood, and producing a variety of custom-designed parts and products.

Production machining involves high-volume manufacture runs of parts, products, and/or components. The process entails removing the excess from a piece of raw material into a desired part or shape. Then, repeating the process to produce large quantities. CNC machining is often used for production machining in which tools like mills, grinders, and lathes are controlled by computers.