The increasing demand on industries to machine difficult-to-cut materials with precision and accuracy requires the manufacturers to improve their ability to machine. This necessitates a deeper comprehension of how tool geometries affect cutting performance. Mechanical fastening with precision is most important in structures joining. With the advancement of materials science technology, hybrid composites are considered to be one of the most widely used materials for engineering applications. One of the advantages in using hybrid composite materials is that the characteristics of these materials can be managed to a greater extent by selecting different matrix and fibers. As geometry of the drilling tool exhibits an important role in making better quality holes and less damage, therefore analyzing, and evaluating the performance of drill is very important. In this paper, the effect of drill geometry on machining of hybrid fiber reinforced polymer (FRP) is reported. The quality of the hole surface was assessed by measuring the surface roughness of the hole. Two specially designed drills with different helix angles and double point angles in addition to conventional drill i.e., twist drill was experimented. The results obtained from the experiments indicate that drilling free from delamination can be achieved by the appropriate selection of drill geometry and drilling operation variables. Also, the combined effect of helix angles and double point angles will be crucial for axial force (Thrust). Further, drilling process variables such as feed rate and rotational speed of the spindle are investigated, exhibiting that feed rate is dominating the damage of the surface.

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