... per yearheat treatment:anneal, quenching, normalizing, carburizing,polishing, platingMachiningCNC and NC machining, turning, milling, drilling, boring, threading, grinding machines ... hardening and Nitriding per material spec MachiningMachine the castings by CNC according to drawing spec. Final inspectionTest the parts’ ... parts into plywood or iron case for transportation. cnc precision casting part