A professional who sets up and operates piercing machine to shape metal tubes from billets or enlarge inside diameter of shells according to job order or blueprints. Respnsibilities include:

• Selects, positions, and adjusts piercing rolls, which rotate and shape outside of tube, using hoists, wrenches, measuring instruments, and knowledge of metal properties.
• Attaches specified piercing point to arbor to form and control size of internal diameter of tube.
• Adjusts feed guides, stops, tailstock, and arbor rings according to size of workpiece, using handtools.
• Moves levers to control movement of heated billet as it advances through rolls and over piercing point.
• Measures finished workpiece to verify conformance to specifications, using calipers, fixed gauges, and micrometers.
• May be specified by employer according to experience with particular material worked or machine operated.