These machines are designed and developed for resizing and repolishing of Polycrystalline, Natural & Mono diamond dies. The simple and manually operated ultrasonic machine consists of an ultrasonic generator, drilling head and die table. Drilling head assembly consists of a sandwich type piezo ceramic transducer, which produces fine and continuous ultrasonic power. Ultrasonic head up and down movement is by rack and pinion mechanism. Die table assembly is with counter weight balance.