... requirements: 0.2Mpa,8L/min5. duty circle: 100%6. auto-control function of the timing: heating time, holding time, ... , motorcycle accessories high-frequency hardening heat treatment. For example: crank shaft, ram, piston pin, camshaft, vavle. transmission within the ... various gears, shifting fork, spline shaft, gear axle, drive axle, small crank shaft pins, rocker, and other accessories high ...