Product description:

Material (blank blanking) - (medium frequency quenching) frequency furnace - hole (pier hole) - pier (rough CNC) - rough and semi-precision turning (semi-precision CNC) - rolling, rolling line (knurling, rolling thread) - (milling groove) - milling heat treatment (heat treatment) - (one for rough grinding and one for fine grinding) - milling (rough grinding and fine grinding) - cleaning, packaging and warehousing (cleaning and packaging)