... , screwdrivers, hammers, axes and so on.3.2 kinds of auto parts, motorcycle accessories high-frequency quenching. Such as: crankshaft, connecting ... rod, piston pin, crank pin, wheel, camshaft, valves, all kinds of rocker arm, rocker shaft; transmission of various ... the piston plunger, rotor pump rotor on a variety of valves for the shaft, the gear pump gear, etc. quenching.3 ...