... New Quenching machine tool For Valve, Cylinder Main configuration:1, CNC system control;2, Stepper motor drive;3, Ball screw drive ... slider sliding;5, AC variable speed motor drive sprocket chain, the light bar to rotate ... the workpiece;6, AC gear motor drive screw, screw the top down;7, Solenoid ... , the surface under a thick layer of hard toughness region, with better compression stress, fatigue ...