Is a center punch required for AD (dimple) rivets during removal?

Using a center punch is generally not considered necessary for the removal of AD (dimple) rivets. The design and construction of these specific rivets allow for effective removal without the need for a center punch. When working with dimpled rivets, the typical procedure involves drilling out the rivet, and the drill bits are often designed with centering capabilities that help maintain accuracy throughout the process.

Unlike some other types of fasteners, where misalignment during drilling could lead to stripping or damage, AD rivets can be removed directly by drilling into the head of the rivet without the added step of center punching. This simplifies the process and can save time during maintenance or repair operations. Therefore, the answer indicating that a center punch is not necessary correctly reflects the practices surrounding the removal of AD rivets.