A professional who tends semiautomatic lathes that face and chamfer rim, cut diameter to size, and impart finish on watch balance wheels. Respnsibilities include:

• Places balance wheel on locating pin in nest of quill, heats quill nest, wheel, and shellac stick to melt and apply shellac, using Bunsen burner.
• Places quill in holder of semiautomatic shellacking machine and presses button to start machine that heats and melts shellac.
• Presses wheel into nest and cools shellac to secure wheel in position.
• Places and clamps quill in lathe, exercising care to seat parts to prevent damage to diamond cutters.
• Presses button to start and run lathe through machining cycle.
• Removes quill from lathe, heats nest, and removes wheel, exercising care to prevent damage to wheel.
• Places wheel in alcohol to dissolve and remove shellac.
• Examines finish and gauges outside diameter of wheels to ensure specifications are met, using loupe and micrometer or fine gauge.
• Removes old shellac from quill, using Bunsen burner and brass wiping tool.
• Lubricates and cleans quill and machine as needed.