When deburring holes, which side is typically deburred?

Deburring is a critical process in aerospace manufacturing to ensure that components meet safety and performance standards. When deburring holes in materials, the back side is typically deburred because this side is more likely to have been affected by the machining process. The back side, or the side opposite the face where the final finish is applied, can often have raised edges, burrs, or sharp protrusions that may not only affect the fit and performance of assembled parts but can also pose safety risks during handling and assembly.

Removing these imperfections from the back side helps ensure that fasteners can be properly seated without obstruction, avoiding issues like misalignment or wear during operation. Also, deburring the back side can improve the overall aesthetics of the assembly while preventing potential damage to other components during installation.

While deburring the outer side, front side, or top side may seem useful in some contexts, the primary focus on the back side in aerospace practices ensures the integrity and functionality of the assembly as a whole.