Thread Rolling is a metal forming process used to create threads on a workpiece by applying compressive force through thread rolling dies (thread rollers) or a thread rolling machine. This force causes the metal to flow plastically (plastic deformation) and form threads without removing material.
Unlike thread cutting, which uses lathes or taps to cut away metal, thread rolling reshapes the surface by pressure. As a result, the material maintains its original density, producing stronger threads with a smoother and more uniform surface finish.
Increased thread strength and improved tensile resistance
No metal chips or cutting waste, resulting in better material efficiency
Smooth, polished thread surfaces, reducing friction during use
High-speed process, ideal for mass production
For these reasons, thread rolling is widely used in metal parts manufacturing and the automotive industry, as it delivers strong, precise threads with minimal need for additional finishing or polishing.
In-Feed Thread Rolling
Suitable for short threads (shorter than the width of the rolling dies). The dies are pressed directly into the stationary workpiece to form threads. This method is commonly used for nails, screws, and bolts.
Thru-Feed Thread Rolling
Designed for longer threads (longer than the width of the rolling dies). The workpiece rotates and moves forward during the rolling process, producing continuous threads of the required length. This method is ideal for threaded rods and studs.
To achieve high-quality, well-defined threads, it is essential to choose a certified and reliable manufacturing facility with complete readiness in terms of machinery and skilled personnel. Chai Metal Co., Ltd. offers a comprehensive range of thread rolling dies manufactured to international standards, including METRIC, UNC, UNF, BSW, BSF, BSPT, NPT, and other specifications.
Our production is supported by high-quality machinery from Taiwan and Japan, ensuring precision and consistency in every process. We also provide custom thread rolling services tailored to specific customer requirements. In addition, we offer thread rolling die repair services, giving customers a cost-effective option to reduce production costs while maintaining performance and quality.