CNC Milling
CNC milling, also known as CNC turning, is one of the most common types of precision CNC machining services. The number of axis points within the machine classifies CNC milling machines. Generally, CNC milling machines have at least three axes, X and Y for horizontal movements, and Z for verticals. In some cases, however, CNC milling machines utilize five axis points with extra pivot points.
CNC milling is primarily used for engraving applications because of its use of multiple axes combined with conical tools and precise cutters. CNC milling machines provide precision without affecting the speed of the operation. In addition to hand-engraving applications, CNC milling also allows for the creation of 2.5D surfaces.
The process of CNC milling begins when a piece of raw metal, referred to as a billet, is loaded into the machine. Highly detailed work is then created. With the use of CNC milling, very little "finishing" is needed to remove rough edges or blemishes, but some post-production work may be necessary to meet safety regulations.
CNC milling mostly takes place on a lathe, which performs operations that need the rotation of the piece in order for the cutting or milling to take place. To ensure accuracy of operation, the lathe requires frequent calibration. CNC milling is an expensive type of metal forming due of the extensive maintenance the machines need to continue functioning correctly, but the process also provides greater accuracy than other forming processes.