Make tools, fittings, and small metal pieces used in other products.
Inspects and tests sample phonograph records, using optical instruments and audio equipment: Inspects record for defects, such as bumps, stains, or scratches. Compares number imprinted on record with serial number on label to ensure correct labeling. Places record on turntable and guides calibrated microscope over revolving record, observing movement of off-center line of record, to determine if groove centering is within specified tolerances. Plays record on sound-producing equipment, listening for defects, such as pops, ticks, or distortion, and to verify that selections on record conform to printed label. Notes defects and returns record to pressing department.