What component of the counterbore ensures proper alignment with the clearance hole?

The pilot is a critical component of the counterbore as it ensures proper alignment with the clearance hole. When a counterbore tool has a pilot, it fits snugly into the existing hole, guiding the cutting portion of the tool precisely. This alignment is essential because it helps to create a counterbore that is concentric with the hole, leading to improved accuracy and consistency in machining processes. Without a well-designed pilot, the counterbore could become misaligned, resulting in uneven surfaces or inaccuracies that can affect the assembly of components. Therefore, the role of the pilot is central to achieving the desired machining outcomes in precision applications.