... heating quenching furnace for auto parts shaft Heat treatmentVarious kind of automobile parts, motorcycle parts, hardware tools, gears, chain wheels, ... making changes.Specific applications are as follows:1, various hardware tools, hand tools. Such as pliers, wrench, hammer, ax, screwdriver, ... a small shaft, fork, etc. quenching;3, various power tools. Such as gear, shaft;4, the machine tool industry . ...