Spiral inserts for internal thread milling of ISO metric threads represent a high-precision solution for producing internal threads on CNC machines. These inserts, designed for use with SRH toolholders, ensure optimal performance in entry holes of various diameters, allowing stable, precise, and vibration-free machining, even at the high speeds typical of modern machining centers.

The operation is based on a toolholder equipped with spiral seats that accommodate profiled inserts according to the pitch of the metric thread to be machined. Through CNC programming, the machine performs the thread milling operation by accurately removing chips, shaping the material in a controlled and repeatable manner. The toolholder, available in various outer diameters, enters the hole to create the internal thread corresponding to the dimensional specifications required by the project or technical drawing.

Thanks to the special spiral geometry of the inserts, machining takes place with a uniform distribution of cutting forces, ensuring a smooth, vibration-free process and excellent surface quality. This configuration allows not only the production of standard metric threads but also customized threads with specific diameters, while maintaining the same metric thread profile.

Spiral inserts can be used on all materials, from softer ones such as aluminum and brass to harder ones like alloy steels, stainless steels, titanium, and superalloys, always ensuring high reliability and long tool life. Applications cover a wide range of industries, including automotive, aerospace, space, defense, precision mechanics, machine tools, industrial valves, and OIL & GAS, as well as rapid prototyping and the production of single or small series parts.

Using spiral inserts in combination with state-of-the-art CNC machine tools, such as vertical and horizontal machining centers or multitasking milling machines, ensures high productivity and a significant reduction in cycle times, thereby improving the overall efficiency of the production process.

To achieve maximum performance and ensure compatibility with both the material and the machine used, it is essential to select the correct insert based on thread pitch, nominal diameter, and type of machining.

Contact Tadaah for specialized technical support in the selection and optimal use of inserts, to guarantee excellent results and extend tool life under all working conditions.