3414 — Machining*
This standard covers nonsupervisory work involved in the manufacture of parts and items of equipment from castings, forgings, and other raw stocks made of various metals, metal alloys, and other materials, and/or machining operations required in the repair of such items. The work requires the use of various types of conventional and/or computer numerical control (CNC) machine tools and their attachments to perform machining operations in the repair and/or manufacture of parts from raw stock. The work performed by machine tool operators requires basic knowledge of machining processes and skill in performing machining operations such as boring, drilling, planing, milling, and turning on milling machines, radial, or multiple spindle drill presses, shapers, planers, lathes, or equivalent types of conventional and/or CNC machine tools. The work performed by machinists requires skill in the initial planning of necessary work sequences, laying out reference points and lines to be followed in the machining processes, planning for and setting up the work in the machine, sometimes programming the cutter path, selecting and shaping metal cutting tools and inserts, operating all types of machine tools , and performing precision handwork to fit, finish, and assemble machined parts and equipment. The work also requires knowledge of the makeup of blueprints and drawings and the skill necessary to interpret them; and skill in working from other types of specifications such as sketches, models of parts to be manufactured, or work orders.