... efficiency high frequency heating quenching furnace for auto parts shaft Heat treatmentVarious kind of automobile parts, motorcycle parts, ... piston pin, wheel, aluminum wheels, valves, rocker shaft, drive axle, a small shaft, fork, etc. quenching;3, various power tools ... quenching;5, various hardware metal parts, machining parts. Such as shaft, gear (sprocket), cam, clamps, fixtures, etc. quenching;6 ...