A professional who sets up and operates thread-milling machine to mill threads on external and internal surfaces of metal workpieces, applying knowledge of thread types and thread-milling methods. Respnsibilities include:

• Studies blueprints, charts, drawings, and work orders to determine pitch and depth of thread, and type of tooling specified.
• Lifts workpiece to fixture and bolts or clamps it in place, using handtools.
• Selects and inserts cutting tool in machine spindle.
• Sets and adjusts speed of cutting tool and feed rate of workpiece.
• Positions cutting tool and workpiece to computed angles, and installs gears, cams, and stops to control multiple movements of workpiece and cutting tool.
• Starts machine and inspects workpiece during and on completion of milling operation, using measuring instruments, such as thread gauge and thread measuring wires. Removes milled workpiece from fixture.
• May compute thread dimensions, using standard formulas.