Delamination and tool wear are the major causes of concern for machining fiber-reinforced polymer based composites. This paper gives the analysis of machining parameters such as feed, depth of cut, tool angle, etc. influencing the resultant force during the machining of fiber-reinforced polymer-based composites for the drilling operation and to study the tool geometry for the arrest of de-lamination to obtain good surface finish. In this study, drilling process is analysed on a thick GFRP laminate and simulation for the tool geometry is performed by using the finite element software ANSYS to obtain necessary solutions.