How do taps and thread chasers differ?

The distinction that taps are used for creating internal threads while thread chasers are utilized for external threads is crucial in understanding their specific applications in machining and threading processes. Taps are designed to cut internal threads in pre-drilled holes, allowing screws or bolts to fit securely within various materials. This process involves a helical cutting edge that removes material as it is twisted into the hole.

In contrast, thread chasers are specifically crafted to create and refine external threads on rods or cylindrical surfaces. They are often used in conjunction with lathes for greater precision in forming threads. This function is essential in applications where external threading is necessary for bolts, nuts, and other fasteners.

Therefore, the correct understanding is that taps and thread chasers serve different purposes that are vital for producing threads in the desired locations of a workpiece. This differentiation also highlights the significance of using the right tool for threading tasks to ensure mechanical integrity and proper fitting in assemblies.