... , motorcycle parts. such as crank axles, tie rod, gudgeon pin, chain wheel, aluminium wheels, air door, ocher-arm shaft, ... about 500 and 800.1. hardening parts of automobile, motorbike, mold, agricultural machinery.2. hardening machinery parts, such as: all ... treatment pliers, spanner, screwdriver, drill, axe 5. hardening pin, piston ring, spring pin, valve, shifting fork. 6. all kinds of track spiker. ...