The machining stage begins with the machinist positioning the metal on the first machine tool. Then they set the controls and make the cuts. New machinery allows various functions to be performed with one setup. During machining, machinists constantly monitor the speed and feed of the machine. They also check that the metal is properly lubricated and cooled.
Most machinists produce small batches of one item or one special item at a time.
Production machinists, however, may produce large numbers of the same part. Other machinists do maintenance work, such as making new parts for existing machinery. These machines are run by computers and perform very precise movements. These machines are increasing the productivity of machinists. Tool programmers specialize in programming CNC machine tools.