In depth analysis of screw torque definition importance and influencing factors

The torque of the screw refers to the torque required to be applied during the tightening or loosening of the screw. The size of the torque is crucial to the fastening effect and service life of the screw. Factors affecting screw torque include material, thread design, lubricants and so on.

First,the definition and importance of screw torque

Screw torque, that is, the torque required to be applied when tightening or loosening the screw, is one of the important indicators to evaluate the performance of the screw. The size of the torque directly affects the tightening effect and service life of the screw. If the torque is insufficient, the screws may not be able to effectively fix the connector, resulting in loosening, vibration or even falling off; Excessive torque may lead to excessive stretching of the screw, or even fracture, which also affects the use effect.

Second, factors affecting screw torque

1. Material: The material of the screw has a direct impact on its torque. Physical properties such as hardness and elastic modulus of different materials are different, resulting in different torque forces required to be applied. For example, high-strength steel screws usually require greater torque to tighten.

2. Thread design: Factors such as the shape, size and pitch of the thread will affect the torque of the screw. A suitable thread design can ensure that the screw is evenly stressed during tightening, thus improving the tightening effect.

3. Lubricant: The use of lubricant can reduce the friction between the screw and the connector and reduce the required torque. However, different lubricants have different degrees of influence on the torque, and it is necessary to choose the appropriate lubricant according to the specific application scenario.

Third, how to reasonably control screw torque

In practical applications, we need to reasonably control the torque of screws according to specific needs and scenarios. On the one hand, it is necessary to ensure that the material and thread design parameters of the selected screws meet the requirements of use; On the other hand, it is necessary to choose the appropriate lubricant to reduce friction and reduce the required torque. In addition, the torque of the screws can be precisely controlled by using tools such as torque wrenches to ensure tightening effect and service life.