Ultrasonic drill

In this drilling machine the cutting tool is reciprocated at the ultrasonic frequency of 20 kc/s and the cutting is due to the chipping action of the abrasive particles which are applied as a slurry to the tip of the tool. As the tool is not rotated, non-circular holes may be cut.

The drill head consists of a magnetostrictive transducer coupled to a brass matching stub to the end of which are screwed the various cutting tools. The power is supplied by a 50 watt oscillator.

The machine is suitable for the drilling of hard and brittle materials such as glass and ceramics.