Abrasive jet machine (AJM) uses air jet velocity for to guide abrasive particle and to erode material of workpiece. Amount of material removed depends on various process parameters such as nozzle bore diameter, operating pressure, standoff distance, etc. While drilling micro hole it is very kin to get required amount of bore diameter on workpiece. For such condition it is very important to observe kerf taper. This paper gives us brief review about recent work done by various researchers regarding effect of process parameters on output i.e. hole diameter and also mention value to keep for process parameter to get better result. Experiments were conducted using experimental setup and drilling was performed and results are discussed.