A professional who operates boring machine to cut mortises in window jambs for installation of sash weight pulleys. Responsibilities include:

• Installs boring bit of specified size in machine chuck and tightens chuck, using wrench.
• Sets stops and guides on machine carriage according to depth and length of cut, width and length of jamb, and specified location of mortise.
• Sets jamb in machine carriage against guide and stop, and clamps jamb in place with lever.
• Starts machine and moves lever to feed jamb into cutter to cut mortise.
• Measures dimensions and location of cut, using rule.