What is the principle of screws?

Jiaxing Xinhan Technology Co., Ltd. is a Chinese manufacturer specializing in the production of various types of machine screws, located in the beautiful Haiyan, Jiaxing, Zhejiang.

The principle of the screw is mainly to use the inclined plane principle to save effort, but it takes a long time. The design of the screw makes the rotational motion can be converted into linear motion, and the function of fixing and fastening is realized by the inclination angle of the thread. When the screw rotates, its force has two components: one is in the tangential direction of the thread, and the other is in the axial direction. About 40% of the screw-in torque is converted into axial force, 50% is used to overcome the top drilling friction, and 10% is used to overcome the thread surface friction.

The inclined surface design of the screw saves effort during the screwing process, but at the same time increases the required operating distance. The smaller the slope of the inclined surface, the more obvious the labor saving effect, but the operating distance will also increase; the larger the slope, the labor saving effect will be weakened, but the operating distance will be reduced. This design allows the screw to transfer force more effectively when fastening objects, and can adapt to different fastening needs.