... Start fast 3.Power adjustable 4:High efficiency high frequency heating quenching furnace for auto parts shaft Heat treatmentVarious kind ... , valves, rocker shaft, drive axle, a small shaft, fork, etc. quenching;3, various power tools. Such as gear, shaft;4, the machine ... quenching;5, various hardware metal parts, machining parts. Such as shaft, gear (sprocket), cam, clamps, fixtures, etc. quenching;6 ...