A professional who sets up and operates tuber machine to extrude rubber in specified form. Responsibilities include:

• Selects and installs die in machine, using handtools.
• Turns steam valve or lights gas burner to heat machine to desired temperature.
• Starts machine, turns dial for specified extrusion speed, and turns die screws to extrude stock of specified size.
• Feeds rubber stock into machine by hand or conveyor.
• Verifies dimensions of extruded rubber with gauge, calipers, and ruler.
• Turns wheels or pulls levers to synchronize conveyor with extruding speed.
• May be designated according to product extruded as garden-hose tuber-machine operator; inner-tube tuber-machine operator; rim-strip tuber-machine operator; rubber-flap tuber-machine operator; solid-tire tuber-machine operator; tread-tuber-machine operator.
• May cover braided fabric hose with rubber and be designated covering-machine operator.