A professional who sets up and operates milling machine equipped with built-in or attached tracing mechanism that guides cutting tool in parallel relationship to stylus that moves along three-dimensional model or two-dimensional template to mill contour of model or profile of template on metal workpieces. Respnsibilities include:

• Studies blueprint, layout on workpieces, and template or model to determine tooling, sequence of operations, and finished dimensions of workpiece.
• Positions and secures workpiece and model or template parallel to each other on machine bed or angle plate, using height gauges, parallel blocks, sine bars, steel rule, wrenches, and clamps.
• Moves handwheel to position cutting tool on workpiece in specified relation to stylus on model or template.
• Observes operation and makes adjustments to ensure conformance of milled workpiece to specifications.
• Verifies conformance of workpiece, using dial and surface gauges, templates, calipers, and micrometers.
• May turn lever to start flow of coolant on machining area.
• May mill plastics or other nonmetallic materials.