... and motorcycle fittings, such as crankshaft, connection rod, pinton pin, chain wheel, aluminum wheel, valve, rock arm shaft, small shaft and ... hardware metal parts and machined parts, such as shaft gear (chain wheel) cam, chuck and clamp. Etc.5.Quench for hardware ... the same material or different materials.1.Welding of various hardware cutting tools, such as diamond tool, abrasive tool, drilling tool, ...