Abstract: “This paper presents a study for optimizing the blank parameters of rolled threaded auto components. The experiments have been designed to optimize the outer diameter of thread M8×1.25 6g by Taguchi Method. The outer diameter of the external thread is dependent on the parameters like surface roughness, out of roundness and material’s properties such as tensile strength etc. An orthogonal array L9 (OA), signal-to-noise(S/N) ratio and analysis of variance (ANOVA) were employed to investigate the range of outer diameter of a screw thread. The optimum combination of surface roughness, out of roundness and tensile strengthof materials has been shown in this paper”

Keywords: Rolled threads, M8, Taguchi Method, Optimization, Analysis of Variance (ANOVA), and Confirmation test.