A professional who coats bowling ball molds components with parting agent, installs ball cores, and assembles and seals molds preparatory to filling and curing. Respnsibilities include:

• Inspects parts to ensure clean and dry condition and applies parting agent, using brush or spray gun.
• Installs core on support bolt and turns bolt to adjust core to center of mold.
• Lays yarn gasket in groove around bottom flange, aligns top of mold over bottom, and secures it with thumbscrews or clamps.
• Places completed mold in rack for filling.
• May disassemble molds and remove cured balls from molds.