When setting the drill stop, where should the reamer be placed?

The reamer should be placed across the top edge of the assembly when setting the drill stop because this position allows for proper alignment and accurate depth setting. By placing the reamer in this way, you ensure that the drill stop is set to the correct depth consistent with the specifications for the reaming process. Proper depth setting is crucial in aerospace assembly, as it impacts the fit and function of the parts being assembled, which must meet strict tolerances and performance criteria.

If the reamer were placed in a different position, such as near the drill chuck or on the side of the assembly, it might not reflect the precise depth required for the specific application, potentially leading to improper hole size and fit. Thus, positioning the reamer across the top edge ensures you achieve the intended mechanical integrity and adherence to design requirements.