... adjustable 4:High efficiency high frequency heating quenching furnace for auto parts shaft Heat treatmentVarious kind of automobile parts ... motorcycle accessories. Such as crankshaft, connecting rod, piston pin, wheel, aluminum wheels, valves, rocker shaft, drive axle, a small ... , various hardware metal parts, machining parts. Such as shaft, gear (sprocket), cam, clamps, fixtures, etc. quenching;6, the ...