A tap and a die are tools used in the process of cutting threads, but they serve different purposes and are used in different contexts.
A tap is a tool used to cut internal threads within a hole. It is typically made of hardened steel and has cutting edges that remove material to create the female portion of a mating pair. Taps come in various types, such as taper, plug, and bottoming taps, each designed for specific applications. The process of using a tap is called tapping, and it is commonly used in manufacturing and repair to create threads in metal, plastic, or wood.
A die, on the other hand, is used to cut external threads on a cylindrical or conical surface, such as a rod or a bolt. Dies are also made of hardened steel and have cutting edges that shape the male portion of a mating pair. They come in different forms, including round dies and adjustable split dies, and are used in a process called threading or chasing. Dies are essential in producing threaded fasteners and components in various industries.
In summary, the primary difference between a tap and a die is their application: a tap creates internal threads, while a die creates external threads. Both tools are crucial in the production and maintenance of threaded components, ensuring proper fit and function in mechanical assemblies.