Centering and Guiding: The pilot drill creates a precise starting point for the subsequent carbide drill, ensuring it drills accurately along the intended path. This centering 

capability reduces the risk of the drill going off center, especially in hard material machining that requires high precision.

Reduced Axial Force and Torque: By creating a preliminary shallow hole, the pilot drill reduces the axial force and torque experienced by the carbide drill. This relieves 

pressure on the cutting edge, extends tool life, and maintains high precision throughout the drilling process.

Chip Evacuation: Proper chip evacuation is essential to maintaining the accuracy of machining operations. The pilot drill helps improve chip evacuation by guiding the chips 

away from the cutting area.

Reduced Work Hardening: During drilling operations, the surface of the material may become work hardened due to the heat generated during the cutting process. The pilot 

drill reduces this effect by effectively penetrating the hardened surface layer, allowing the carbide drill to cut the material with less resistance and maintain accuracy.

Improved Hole Quality: The pilot drill helps to machine clean, round and straight holes with minimal surface roughness. This ensures that the subsequent carbide drill creates 

accurate holes that meet the required tolerances, which is very important in high-precision applications and industries.