CNC machine for small and medium businesses (computer numerical controlled) machines are computer controlled versions of precision machines. CNC grinding can be used to grind surfaces to precision based solely on computer instructions.

CNC grinding is usually used for making tools. Computers are used to operate machines that grind metal to form shapes as specified by program of the computer. The tools are often used for the manufacture of other products (i.e., automobile parts, medical or aerospace equipment). An example of a simple tool formed by a CNC grinding is a drill bit. CNC grinding has many applications. Due to the ability to program complex instructions for the machines controlled by the computer, the possibilities are almost limitless. CNC shops manufacture items in small or large quantities ranging from simple to complex engineering depending on the needs of their customers.