A professional who lays out, fits, and assembles parts to make and repair cutting tools, jigs, fixtures, gauges, or machinists' handtools, analyzing specifications according to knowledge of tool designs, shop mathematics, machining, and layout and assembly procedures. Respnsibilities include:

• Studies blueprint to determine machining to be done and plans layout and assembly.
• Measures, marks, and scribes metal stock to lay out for machining by other workers.
• Operates drill press to drill and tap holes in parts.
• Smooths and scrapes parts to fit, using handtools such as files and scrapers.
• Positions and secures parts on surface plate with devices such as V-blocks, vises, and angle plates.
• Assembles parts into product, using tools such as wrenches, hammers, and tweezers, and verifies dimensions and alignments, using measuring instruments such as micrometers, height gauges, and gauge blocks.
• May set up and operate surface grinder to grind surface of parts.
• May test assembled mechanism.
• May be designated according to specialized function as tool repairer, bench; or according to product made as gauge maker; jig-and-fixture maker.