A professional who tends band-seating machine that roughens grooves (band seats) of artillery shells so that brass or copper bands affixed by banding-machine operator will secure shell and rotate it when fired. Respnsibilities include:

• Positions shell in chuck of lathe and tightens chuck, using wrench.
• Moves machine controls to start shell rotating and engage feed of knurling tool.
• Presses and releases pedal when band seat is sufficiently scored and removes processed shell from chuck.