Electric Discharge Machining (EDM) is very important and prominent machining process

among all the newly developed non -traditional machining techniques. This process is

extremely useful for "difficult to machine" conducting materials such as heat treated tool

steels, composites, super alloys, heat resistant steels, ceramics, carbides, etc. In this

technique i.e. in EDM, the material removal of the electrode is achieved through high

frequency sparks between the tool and the work-piece immersed into the dielectric. The

Material Removal Rate (MRR), Tool Wear Rate (TWR) and surface roughness are some of

the important performance parameter of EDM process. The objective of EDM is to get high

MRR as well as achieving reasonably good surface quality of machined component. The

machining parameters that achieve the highest MRR strongly depend on the size of the

machining surface i.e. Electrode used and work-piece surface. With upcoming worldwide

important applications of Non-Conductive ceramics machining has become an important

issue which needs to be investigated in much detail. The Alumina (Al2O3), Glass and other

advanced engineering ceramics are rapidly emerging class of engineering materials

possessing a wide range of remarkable properties i.e. high hardness, chemical stability,

very low friction, unique electrical properties and these engineering ceramics posses high

wear resistance which make them highly suitable for such engineering applications as jet

engines and other aeronautical components, tools and dies and electronic sensors.