Set up, operate, or tend milling or planing machines to mill, plane, shape, groove, or profile metal or plastic work pieces.
<ul><li>Position and secure workpieces on machines, using holding devices, measuring instruments, hand tools, and hoists.</li><li>Remove workpieces from machines, and check to ensure that they conform to specifications, using measuring instruments such as microscopes, gauges, calipers, and micrometers.</li><li>Verify alignment of workpieces on machines, using measuring instruments such as rules, gauges, or calipers.</li><li>Observe milling or planing machine operation, and adjust controls to ensure conformance with specified tolerances.</li><li>Move cutters or material manually or by turning handwheels, or engage automatic feeding mechanisms to mill workpieces to specifications.</li><li>Select cutting speeds, feed rates, and depths of cuts, applying knowledge of metal properties and shop mathematics.</li><li>Study blueprints, layouts, sketches, or work orders to assess workpiece specifications and to determine tooling instructions, tools and materials needed, and sequences of operations.</li><li>Move controls to set cutting specifications, to position cutting tools and workpieces in relation to each other, and to start machines.</li><li>Compute dimensions, tolerances, and angles of workpieces or machines according to specifications and knowledge of metal properties and shop mathematics.</li><li>Replace worn tools, using hand tools, and sharpen dull tools, using bench grinders.</li><li>Select and install cutting tools and other accessories according to specifications, using hand tools or power tools.</li><li>Turn valves or pull levers to start and regulate the flow of coolant or lubricant to work areas.</li><li>Record production output.</li><li>Mount attachments and tools, such as pantographs, engravers, or routers, to perform other operations, such as drilling or boring.</li></ul>