Abstract: Many of the researchers attained concentration on CFRP (Carbon fiber reinforced polymers) and identified as maximum material for the implementing in the domains of engineering in former past years unsettled for their maximum robustness for less ratio weight, resistance of corrosion & resilience. However, process of machining is seen as the great challenge due to their high strength & high hardness. The selection of cutting tool is another aspect. The present contribution of experimental work deals with the impact of machining aspects on CFRP plates prepared by Hand lay-up procedure. Here, the simulation study has been conducted on a CNC Drilling machine by considering Speed, Feed and type of Cutting tool as parameters. A High-Speed Steel (HSS) Drill bit of size 12mm is used to drill the hole without coating and with titanium-aluminum-nitride (TiAlN) Nano coating. The drilling operation further enhanced once again by double coating of HSS tool with titanium-aluminum-nitride to describe the hole quality. The drilling operation is performed on six different thicknesses of CFRP plates to observe the quality of the hole at entry and exit. When the double coated HSS tool introduced it is observed that the quality of hole at entry and exist is same and without push-out delamination (POD). The observations are optimized by using Design of experiments (DOE). Finally, the outcomes exhibit the optimal drill hole quality surface on the CFRP metal through using double coating of titanium-aluminum-nitride on HSS drill bit is explained by using Taguchi Analysis for six different thickness.