|This type of processing is described as a type of machining (such as milling, turning and grinding). For what reason? The application of tools to the material causes the removal of excess material, in other words, material that is not necessary.
|This process is applied to solid materials – in this case, metals – by use of a special tool. This tool is the drill bit, a special termination of an automatic machine. The result of this operation is a round opening. This is the most commonly achieved shape, however, it depends on the working end of the tool. Using a special drill, one can also achieve polygonal openings, triangular or square ones.
|In most cases, the work piece remains immobile, with the rest of the device moving.