A professional who tends planetary-type, threading-cutting machine that cuts interior and exterior threads in artillery shells, so that fittings, such as fuse caps, can be attached. Respnsibilities include:

• Turns setscrews to secure position and depth of thread and to adapt compressed-air holding chuck to material.
• Positions shell in machine and tightens chuck.
• Closes switch to activate cutting tools.
• Presses levers to stop cutting tools and release chuck.
• Inspects shells, using fixed gauges.