Abstract: Development of a portable rotary MIG arc welding machine, the rotary MIG ARC welding is one of the several techniques developed for narrow gap welding. It has been found that fusion characteristics of the HAZ is improved because of the nature of the ARC physics. The process can be effectively used for different materials particularly those sensitive to heat input including high strength low alloy, stainless steel and heat resistant steels, aluminum and titanium alloys. Based on this result, it has been identified that this type of welding is more suitable for fillet and butt welding. The principle of the process is that the welding wire is fed into the electrode nozzle with eccentricity at the contact tip.In this project we will be doing Design, Analysis & Manufacturing for automation for circular parts welding with uniform weld structure. We will be designing & manufacturing the turntable which will be rotating at specific required speed depending upon the requirement of fillet material to be added. Further the electrode nozzle is kept stationary, which will be in contact with the surface of the component to be welded. Hence in this project, a detailed design for converting the conventional MIG welding (ARC) machine into an automated circular component welding machine has been proposed. Along with this main modification the existing MIG welding machine – (a stationary downward ARG – HEAD which has provisions for horizontal and upward movements) is to be modified into a portable welding machine.