Why is cutting oil used when threading a pipe?

Using cutting oil when threading a pipe is essential because it helps to keep the pipe cool during the cutting process. When threading occurs, there is friction generated between the cutting tool and the pipe material. This friction can lead to excessive heat, which not only can damage the pipe but can also degrade the threading tool, leading to poor quality threads and potential failures.

The cutting oil acts as a lubricant, reducing friction and allowing for smoother cutting. This results in cooler operating temperatures, which in turn helps to maintain the integrity of both the pipe and the tool. Additionally, this cooling effect can prolong the life of the threading equipment and improve the overall quality of the threads produced.

While other factors such as aesthetics and rust prevention are important in different contexts, they do not directly relate to the primary function of cutting oil in the threading process. Keeping the pipe cool is a fundamental aspect of ensuring a successful and safe threading operation.