... , holding time, cooling time: 1-99.9s7. The length of split the main-extension connection: 2meters8. Weight and volume:ModelWeight(KG ... -frequency hardening heat treatment. For example: crank shaft, ram, piston pin, camshaft, vavle. transmission within the various gears, shifting fork, spline ... can be from 3KG to 300KG. 70KW high frequency induction pin hardening machine