A professional who sets up flame-hardening machines for flame-hardening-machine operators according to metallurgical work order specifications, utilizing knowledge of heat-treating methods and metal properties. Respnsibilities include:

• Positions fixture for holding workpiece and fastens fixture to machine, using wrenches.
• Mounts workpiece in fixture, on arbor, or between centers of machine.
• Estimates flame temperature and heating time cycle based on degree of hardness required and metal to be treated.
• Moves controls to light burners and adjust flame of oxyacetylene, propane, or other gas to prescribed temperature, judging temperature by flame color.
• Starts automatic feeding or rotating mechanism that moves part through hardening flame.
• Tests hardness of sample part.
• Adjusts automatic feeding or rotating mechanism and flame temperature until sample parts meet specifications.