400w Ultrasonic Grinding Machine The machine is designed for manufacturing and maintenance of diamond drawing wire dies. It is also capable for processing other extra-hard materials. Adopting mechanic and electric devices, the machine can precisely control the frequency, power and timing systems. It forms the basis of machine's high efficiency and high stability. It creatively adopts electric magnet pressure adjusting systems to avoid defects caused by either hydraulic pressure or spring systems. Innovative conception and careful manufacturing guarantee its high efficiency for polishing reparation, easy operation and good stability. It has reached the international advanced level