Recently the need of micro technologies is growing rapidly. Demand of microscale miniaturized parts are increasing in industries like electronics, aerospace, optics, telecommunication, medical, automobile etc. where quality is the most significant element. Micro-machining, micro‐molds and micro‐system are modern engineering science for mass production of the 3D micro-components with an accuracy of microns in a wide range of workpiece material. Mechanical micromachining is an important method in micro-machining process which includes micro-drilling, micro turning and the most efficient micro-milling. IN this project we will perform a micro milling process on Inconel aerospace alloy workpiece using a High Speed Steel tool of 1mm diameter on the CNC machine available in our workshop. Our main objective is to determine the optimal value of the process parameter commonly used in the micro milling process which are Feed Rate, Spindle Speed and Depth of cut so as to reduce the output parameter such as cutting force, cutting time and cutting torque.