In the present paper, experimental study on boring operation in electro-discharge machining (EDM) has been carried out. Boring operation is used to enlarge internal diameter of a circular cavity. The internal diameter of a predrilled circular cavity has been enlarged using three different tool movement strategies, namely, die-sinking, helical, and radial in EDM process. The effect of all three strategies of EDM process for boring operation has been compared with respect to wear ratio (Wr), overcut (Oc), surface roughness (Ra), and circularity error (Ec). It has been observed that radial orbital strategy of EDM process is best suitable for boring operation in comparison with the other two strategies, as it produced lowest wear ratio with minimum overcut and circularity error.