Operate machine tools such as lathes, milling machines, and grinders to produce metal parts. Review electronic or written blueprints or specifications for a job. Calculate where to cut or bore. Shape steel, aluminum, titanium, plastic, silicon and other materials. Determine how fast or slow workpiece is fed into machine. Determine how much material to remove. Select tools and materials for the job. Plan the sequence of cutting and finishing operations. Mark the workpiece to show where cuts should be made. Position workpiece on the drill press, lathe, or milling machine. Monitor and control feed rate and speed. Ensure workpiece is properly lubricated and/or cooled. Regulate temperature of workpiece. Detect problems by listening for specific sounds. Adjust cutting speed to compensate for harmonic vibrations. Monitor the accuracy of cuts.