In the industry of machining, a cutting tool or cutter is any tool, which is used to remove material from the work piece by means of shear deformation. Single-point or multipoint tools can carry out cutting. Single-point tools are utilized in turning, shaping, planing and similar operations, and remove material by means of one cutting edge. Milling and drilling tools, grinding tools are multipoint tools. Every grain of abrasive functions as a microscopic single-point cutting edge and shears a tiny chip.
This tools must be made up of a material harder than the material, which is to be cut, and the tool must be able to withstand the heat generated in the metal-cutting process. Additionally, the tool must have a particular geometry, with clearance angles designed to ensure that the cutting edge can contact the work piece without the rest of the tool dragging on the work piece surface. The angle of the cutting face is very important, because is the flute width, number of flutes or teeth, and margin size. In order to have a long functioning life, all of the above must be optimized, and the speeds and feeds at which the tool is run.