A professional who tends semiautomatic turning lathe that bevels and polishes balance wheel screwheads. Responsibilities include:

• Places screw, using tweezers, into threaded chuck and depresses pedal to turn screw firmly into chuck.
• Turns, bevels, and polishes screwhead by manually feeding diamond tool against rotating head until automatic stop is reached.
• Depresses pedal to reverse direction of rotating chuck and to remove finished screw.
• Observes parts, using loupe and tweezers.