Which metalworking process uses pressure from cylindrical rollers to create threads?

Thread rolling is the metalworking process that utilizes cylindrical rollers to create threads. This method involves feeding a metal rod between two or more rotating rollers that are equipped with thread profiles. As the rollers turn, they apply pressure to the metal, deforming it into the desired threaded shape. This process is efficient for producing large volumes of threaded parts, such as bolts and screws, because it enhances material flow and can strengthen the material through cold working.

In contrast, stamping refers to shaping metal through a die using a punch, milling involves cutting and removing material to create shapes and features, and turning involves rotating a workpiece against a cutting tool to create cylindrical shapes. These methods do not employ the rolling action that is essential for the creation of threads as seen in thread rolling.