During which stage of the drilling process is it recommended to attach the air line to the drill motor?

Attaching the air line to the drill motor after adjusting the drill stop is the recommended practice because it ensures that any changes made to the depth of the drill have been finalized before air pressure is applied. When the drill stop is adjusted, it defines the maximum depth of drilling, and connecting the air line before this adjustment could lead to unexpected operation of the drill, potentially causing damage to the assembly or the drill itself. By waiting until after the drill stop is set, the technician can ensure a safer, more controlled operation of the drill, minimizing risks associated with premature pressurization. This timing also allows for any necessary checks to be completed without the drill engaging unexpectedly.