... frequency heating quenching furnace for auto parts shaft Heat treatmentVarious kind of automobile parts, motorcycle parts, hardware tools, gears, ... scissors) and the quenching;2, Various automotive, motorcycle accessories. Such as crankshaft, connecting rod, piston pin, wheel ... Machine Tool, etc. quenching;5, various hardware metal parts, machining parts. Such as shaft, gear (sprocket), cam, clamps, ...