When using a dreamer or PHT dreamer to enlarge a hole, what speed should the drill motor be set to for both the pilot bit and the reamer?

When enlarging a hole using a dreamer or PHT dreamer, both the pilot bit and the reamer should be set to the same speed. This is essential for maintaining consistent cutting action and ensuring that the reaming process is effective.

Using the same speed for both tools allows for a smoother transition from the pilot bit to the reamer, promoting uniformity in the hole's diameter and surface finish. If the reamer were operated at a different speed, it could lead to issues such as chatter, uneven wear, or an improper fit for the finished hole. Therefore, maintaining the same speed enhances precision and improves the overall quality of the assembly process.

Understanding the importance of matching speeds is key in aerospace assembly tasks, where precision and accuracy are paramount to the integrity of the assembly.