... kinds of gears, chain gears Axles hardening.2. ll kinds of automobile, motorcycle parts. such as crank axles, tie rod, gudgeon pin ... shaft, mall shaft, sifting fork, etc.hardening.3. All kinds of power tool. Such as gear,alex center4. Machine tool bed surface ... ,machine tool guideways,etc hardening.Hardening features:1.adopt IGBT, energy ...