... quenching; for hardening; for annealing; IGBT Intermediate frequency induction hot forging machine (5-20Khz) Main features 1.Adopt IGBT technology, ... and motorcycle fittings, such as crankshaft, connection rod, pinton pin, chain wheel, aluminum wheel, valve, rock arm shaft, small shaft ... hardware metal parts and machined parts, such as shaft gear (chain wheel) cam, chuck and clamp. Etc.5.Quench for ...