Precision Machining is a process of using machinery or performance of the dimensions of the workpiece changes. Press is workpiece temperature is in the state is divided into cold and hot processing. Generally at room temperature, process, and does not cause the workpiece chemical or phase changes, called cold. Usually above or below the normal temperature of the process, it will cause a chemical or piece of phase change material, said thermal processing. Cold press processing methods can be divided into the difference between cutting and pressure processing. Thermal processing common with heat treatment, forging, casting and welding.