A professional who tends machines that grind, cut, crimp, shell, or roll grain, hay, corncobs, chaff, and screenings for stock and poultry feed. Respnsibilities include:

• Opens chute to regulate flow of grain into machine or pitches hay and corncobs into machine hopper.
• Starts machine and adjusts control to regulate speed, according to fineness of grind specified.
• May tend separator that cleans grain prior to grinding or to sift ground grain.
• May start conveyors and elevators to transfer processed feed to storage or packing machine bins.
• May fill sacks and weigh them on platform scale.
• May be designated according to machine tended as Corn-Cutter Operator; Corn-Sheller Operator; Crimper Operator; Crusher-Machine Operator; Hammer-Mill Operator; Rolled-Oats-Mill Operator.