In the present work, the effects of machining parameters on surface roughness during highspeed
drilling of carbon fiber reinforced plastic (CFRP) composite are presented. The machining
experiments are carried out on lathe using two levels of factors. The factors considered were: %
volume fraction of carbon fiber, cutting speed, drill diameter and feed rate. A procedure has been
developed to assess and optimize the chosen factors to attain minimum surface roughness by
incorporating: (i) response table and effect graph, (ii) normal probability plot (iii) analysis of
variance (ANOVA) technique. From the test results, we observe that the technique used is
convenient to predict the main effects and interaction effects of different influential combinations of
machining parameters. Feed rate is the factor, which has greater influence on surface roughness
followed by % volume fraction of fiber and drill diameter. The interaction between all parameters
has more influence on surface roughness, followed by (drill diameter and feed rate) and (% volume
fraction of fiber and drill diameter) comparing with other interactions on the machining of CFRPS composites.