Learn More About Roll Threading

Roll threading is a process of manufacturing threads on a cylindrical workpiece using a set of rollers. The process involves feeding the workpiece between two or more rollers, which are shaped to form the thread profile. As the rollers rotate, they produce threads on the workpiece by displacing the material between the rollers.

Roll threading is one of the most efficient ways to produce high-quality threads, as it can produce threads quickly and with high precision. The process is widely used in industries that require threaded components, such as fasteners, bolts, nuts, screws, and fittings.

Advantages of Roll Threading

One of the advantages of roll threading is its efficiency in producing threads. With the use of high-speed lathes and precision rollers, roll threading can produce hundreds of threads per minute, making it one of the fastest methods of thread production.

In addition to being a fast process, roll threading is also highly accurate. Since rollers are designed to form the thread profile, threads produced by roll threading are consistent in profile and diameter. This consistency is critical when producing threaded components that must fit with precision into mating parts.

Roll threading also creates a stronger and more durable thread compared to other methods, such as cut threading or thread chasing. Threads produced by roll threading are formed by displacing the material, which strengthens the thread by compressing the thread roots and increasing the thread engagement area.

Applications of Roll Threading

Roll threading is a versatile process that can be used to manufacture a wide range of threaded components. It is commonly used in the production of fasteners, such as bolts, screws, and studs, as well as fittings for piping systems.

In the automotive industry, roll threading is widely used to produce engine components, such as connecting rods, crankshafts, and camshafts. These components require high precision and durability, which can be achieved through roll threading.

Roll threading is also used in the aerospace industry, where threaded components must meet strict quality and performance standards. The process is used to produce critical components such as jet engine bolts and aircraft landing gear components.

Materials for Roll Threading

Roll threading can be applied to a wide range of materials, including metals, plastics, and composites. However, the process is most commonly used for metal components, such as steel, aluminium, and titanium.

When selecting materials for roll threading, it is important to consider factors such as material hardness, tensile strength, and elongation. These properties can affect the process of roll threading and the quality of the threads produced.

For example, materials with high hardness may require more force to displace the material and form the threads. This can result in worn or damaged rollers and decreased thread quality. Similarly, materials with low elongation may be more prone to cracking or breaking during the roll threading process.

Roll Threading vs. Cut Threading

Roll threading and cut threading are two common methods of thread production. Cut threading involves the use of a cutting tool, such as a tap or die, to remove material and create the thread profile. In contrast, roll threading displaces the material to form the threads, without removing any material.

One advantage of roll threading over cut threading is its speed and efficiency. While cut threading may require multiple passes to achieve the desired thread depth and quality, roll threading can produce threads quickly and with high precision.

Another advantage of roll threading is its ability to create stronger and more durable threads. Since roll threading compresses the material to form the thread, the resulting thread has a higher thread engagement area and is less likely to loosen or strip over time.


Roll threading is a highly efficient and precise method of thread production used in a variety of industries. The process offers several advantages over other methods, including speed, accuracy, and thread strength. By leveraging the benefits of roll threading, manufacturers can produce high-quality threaded components that meet the demands of their applications.