<p>The effects of drill cutting edge geometry and cutting parameters on the thrust force and delamination factor in the drilling CFRP/epoxy composites were investigated. Five different drills with three distinct geometries were tested. Additionally, the influence of the cutting parameters was studied. The minimizing thrust force and delamination were researched in drilling of CFRPs by using the tools with three different insert geometries under different cutting conditions of three-level cutting speed and feed rate. A series of experimental studies were performed according to the experimental plan to investigate thrust force and delamination factor. Taguchi experimental design, Response Surface Methodology, and analysis of variance (ANOVA) were employed to establish tool geometry and parametric relationships between the experimental parameters and the outputs consisting of delamination and thrust force. DOE was created, the second-order mathematical model was developed using RSM technique, and constraint nonlinear minimization method was used for minimizing the thrust force and delamination and found cutting parameters and tool cutting edge angle for each tool with the different tool geometries. The values of the drilling parameters and the tool cutting angle of different tool types for the minimum of thrust forces and delamination factors were found. A comprehensive comparative analysis was conducted to assess the performance of various tools. This evaluation focused on comparing thrust forces and delamination, utilizing five different types of drills with distinct tip geometries. The comparison encompassed thrust forces and push-down delamination as key metrics.</p>