At present many special materials such as heat resistant steels, geramin-ium, quartz,... are utilised in modern engineering.Such material are difficult to be machined by the conventional methods. Ultrasonic macfeining stands as one of the appropriate methods to handle such situation.
The scope of the present work is to study the performance of ultrasonic machining with form tools (three dimensional tools), where the process parameters such as amplitude of tool vibration,static pressure and slurry circulation can be adversely influenced during tool penetration. A set of experimental work with different tool forms was carried out. Problems associated with form tool machining and different methods for inhancing the process were introduced.