What is the main distinction between threading and tapping operations?

The main distinction between threading and tapping operations is that threading is primarily concerned with creating external threads on the surfaces of cylindrical objects. This process involves shaping the material to form a helical ridge that can accept fasteners like screws or bolts.

Tapping, on the other hand, specifically creates internal threads inside pre-drilled holes to enable the use of internal fasteners, such as screws. The winding nature of the threads is crucial for allowing components to fit together securely.

Thus, the focus on external surfaces in the process of threading defines it and sets it apart from tapping, which deals with internal thread formation. Understanding these operations is key in manufacturing and mechanical engineering, as they play critical roles in the assembly of components.