Locking, also known as seizure, refers to the phenomenon that bolts and nuts are locked during the tightening process, especially between stainless steel screws and stainless steel nuts.
The reasons for the locking of stainless steel screws may include the following:
1. The inclination angle of the thread fit and the softer characteristics of stainless steel: During the installation process, the uneven application or inclination of the force will cause the central axis of the screw and the nut to tilt too much, making the thread easy to be damaged and causing the phenomenon of occlusion.
2. The locking force is too large and the thermal conductivity of stainless steel is low: stainless steel screws generate frictional heat during rotation, while the thermal conductivity of stainless steel is low. When the generated pressure and heat destroy the chromium oxide layer of stainless steel, the metal tooth pattern will directly block or shear, and the stainless steel is soft, which is prone to adhesion. The greater the locking force, the greater the heat generated, and the stainless steel screw teeth are prone to adhesion.
In order to avoid locking and discoloration of stainless steel screws, the following measures can be taken:
1. Uniform application of attention during installation, avoid tilting, and ensure the vertical alignment of the central axis of the screw and the nut.
2. Control the size of the locking force to avoid excessive pressure. At the same time, lubricants can be used to reduce the generation of frictional heat and make the screws rotate more smoothly.
Post time: Aug-02-2023