Centerless grinding precision machining runner thimble titanium valve needle

PVD coating microstructure fine nanoscale particles of both high toughness, high hardness, high oxidation resistance characteristics, and enables frictionless chip removal process very smooth surface. In the coating deposition process, so that the super adherent coating the substrate and product, and can effectively control the deposition thickness of the coating (0.5 micron ─6 unilateral micron) process for the different types of coating products.