... treatmentautomoble, motorcycle accessories high-frequency hardening heat treatment. For example: crank shaft, ram, piston pin, camshaft, vavle. transmission within the ... gears, shifting fork, spline shaft, gear axle, drive axle, small crank shaft pins, rocker, and other accessories high frequency hardening machine ... can be from 3KG to 300KG. 45KW high frequency induction crank shaft hardening machine