One of the main challenges in Engineering industries is to have materials with extra ordinary properties. Due to the difficulty of availability from open market and economical impact on pure hard materials such as titanium, vanadium, tungsten, titanium & its alloys, an alternative approach is performed through this project. The parent pure metal is bought to the difficulty to machine level of hardness and various parameters were analyzed on hard turning operation. Pure EN-31 round bar is considered for this purpose and this is bought to a hardness level of 60-64 HRC, so as to understand the variation in certain parameters, since limited studies were conducted towards the behavior of cutting tool during CBN hard turning. CBN tool were used for the this purpose. Thus this is an investigation on the influence of cutting parameters in hard turning .The combined effect of the process (cutting speed, feed rate and depth of cut) on performance characteristics (surface roughness and chip morphology) are investigated through the analysis of variance (ANOVA). The design of experiment has conducted through Taguchi approach and conformation of experiments is performed through Regression analysis by using MINITAB-17 software. The output variables considered are the surface roughness and the type of chips generated (chip morphology). Chip morphology analysis considers only for continues and discontinues chip as the cutting tool used is CBN. From the experiment it is found that the dependent parameter in surface roughness measurement for Ra, Rq and Rz is feed rate.