... , hammers, axes and so on.3.2 kinds of auto parts, motorcycle accessories high-frequency quenching. Such as: crankshaft, connecting ... pin, wheel, camshaft, valves, all kinds of rocker arm, rocker shaft; transmission of various gears, spline shafts, drive axle, a variety ... variety of valves for the shaft, the gear pump gear, etc. quenching.3.5 Heat treatment of metal parts. Such as the various gears ...