... . transmission within the various gears, shifting fork, spline shaft, gear axle, drive axle, small crank shaft pins, rocker, and other accessories high frequency hardening ... pliers, spanner.hydranlic components: for example:the plunger, rotor, reversing shaft in vavle,gear high-frequency hardening machine.all kinds of ... be from 3KG to 300KG. 45KW high frequency induction crank shaft hardening machine