Ruuvikierre

Ruuvikierre is a Finnish term that translates to "screw thread" in English. It refers to the helical ridge or groove that is cut into a cylinder or cone, which is designed to mate with a corresponding internal thread. This mechanical feature is fundamental to the functioning of fasteners such as screws, bolts, and nuts, enabling them to create a strong and secure connection. The specific dimensions, shape, and pitch of a ruuvikierre are critical for its proper engagement and load-bearing capacity.

The design of a ruuvikierre is governed by standardized systems to ensure interchangeability and compatibility across different manufactured components. Common thread forms include the V-thread, trapezoidal thread, and Acme thread, each with distinct profiles suited for different applications. The direction of the ruuvikierre, either right-hand or left-hand, determines the direction of rotation needed to tighten or loosen the fastener. Right-hand threads are the most common, tightening when rotated clockwise.

Beyond simple fastening, ruuvikierre technology is integral to many mechanical systems, including linear actuators, where precise movement is achieved through the rotation of a threaded rod within a nut. They are also found in devices like jack screws, vises, and even in the plumbing industry for connecting pipes. The manufacturing of ruuvikierre involves processes like cutting, rolling, or grinding, requiring specialized machinery and tooling to achieve the desired accuracy and surface finish.