Kierteyttämällä

Kierteyttämällä is a Finnish term that refers to the process of creating threads on a cylindrical or conical surface. This can be done either internally or externally. Internal threading involves cutting threads inside a hole, while external threading cuts threads on the outside of a rod or shaft. The process is essential in manufacturing and engineering for creating fasteners such as screws, bolts, and nuts, as well as for connecting components in machinery and structures.

The most common method of kierteyttämällä is by using a die for external threads or a tap for internal threads. These are specialized cutting tools with helical grooves that remove material to form the thread profile. The specific type of die or tap used depends on the desired thread size, pitch (the distance between threads), and the material being worked on. Other methods include thread milling, thread grinding, and thread rolling, each offering different advantages in terms of precision, speed, and suitability for various materials. Thread rolling, for instance, deforms the material plastically to create the threads, which can result in stronger threads compared to cutting methods. The accuracy and quality of the kierteyttämällä process are critical for ensuring proper fit and function of threaded components.