What is the name of the tool used to cut threads on a steel pipe?

The tool used to cut threads on a steel pipe is called a die. A die is a specialized tool that provides the necessary threads to a length of pipe, enabling it to be connected with other pipe fittings or components securely. When a die is applied to the end of a steel pipe, it removes material from the surface of the pipe, creating helical grooves that form threads. This threaded end can then mesh with corresponding threads on fittings, allowing for tight seals and reliable connections in plumbing or heating applications.

In contrast, a pipe cutter is designed for slicing through pipe to produce clean, straight cuts, but does not create threads. A threading machine serves a similar function to a die but is typically a larger, more complex machine that can cut threads on various sizes of pipe automatically. A reamer, on the other hand, is utilized to smooth out or enlarge existing holes and would not be appropriate for threading pipe. Each tool has its specific purpose, and understanding the distinct function of a die is crucial for effective pipe preparation and installation in HVAC systems.