Which two tools are typically used to transfer or locate holes from a template?

The use of a transfer punch and a hole duplicator is essential in ensuring precise replication of holes from a template to the workpiece in aircraft metal structural repair.

A transfer punch is specifically designed to create an accurate marking of the hole location on the material by transferring the hole position directly from the template. The pointed end of the punch fits into the hole of the template and, when struck with a hammer, leaves a small indent in the workpiece, marking exactly where a hole should be drilled.

The hole duplicator complements this process by allowing for the copying of hole patterns with varying sizes. It can accommodate a range of hole sizes and ensures that duplicate holes are located precisely, maintaining the correct spacing and alignment as per the original template.

While other tools like a measuring tape or caliper can be useful for measuring and marking, they do not serve the specific function of transferring existing hole patterns as effectively as a transfer punch and a hole duplicator can. These two tools together streamline the process, enhance accuracy, and significantly reduce the potential for errors in making repairs or modifications to aircraft structures.