When enlarging a hole, where should the angled tip of the drill bit be positioned?

The angled tip of the drill bit should be positioned within the pilot hole when enlarging a hole. This positioning is crucial because the tip of the drill bit is designed to guide the bit accurately through the existing hole, ensuring that the enlargement process is controlled and precise. By starting in the pilot hole, the drill bit can effectively follow the original path, which helps maintain the alignment and prevents wandering or misalignment during the drilling process.

Maintaining the tip within the pilot hole also minimizes the risk of damaging the surrounding material, as the pilot hole provides a defined entry point for the drill. This method enhances the quality of the enlarged hole and ensures that it meets the specifications required for components that may be fitted into or through the hole.

When considering other options, positioning the tip inside the material can lead to undesirable results, such as drill bit binding or excessive stress on the tool. Placing it at the surface of the assembly or above it may not offer the necessary guidance, likely causing inaccuracies in the hole's final size and shape. Thus, situating the drill bit tip within the pilot hole is the most effective and precise method for enlarging a hole.