A professional who tends battery of automatic machines that drill thread holes and shape surface of nonmetallic button blanks. Responsibilities include:

• Loads workpieces into machine hopper, using hand scoop.
• Starts machine and observes blanks feeding into rotating chucks on transport mechanism that conveys blanks to cutting tools and drills.
• Stops machine and notifies setup mechanic of malfunction.
• May hand feed pearl button blanks into machine to ensure that blanks are positioned face-up in chucks.
• May place single blank in chuck of manually controlled machine and pull on leverage bar to force blank against cutting tool or drill.