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What are the Ways to Prevent Screws from Loosening at Work?

Oct. 15, 2020

As a Rail Screw Supplier, share with you. Generally, the screw and nut connection is self-locking, and will not loosen by themselves when subjected to static load and working temperature changes little. But under the action of shock, vibration or variable load, and when the working temperature changes little, this connection may loosen, affect the work, and even cause an accident. In order to ensure the safety and reliability of the connection, effective anti-loosening measures must be taken for the connection of screws and nuts.

Rail Washers

Rail Washers

1. Choose the right size. A slightly larger or smaller screw may be barely used at the moment, but in the long run, it will inevitably become loose or locked.

2. Special engineering plastic is processed on the screw thread, so that during the locking process of the screw nut, the engineering plastic is squeezed to produce a strong frictional torsion and reaction force, resulting in full-pitch contact, providing absolute vibration Resistance, the general screw becomes a permanent and strong anti-loosening screw, which completely solves the problem of loose connection between the screw and the screw.

3. Anti-loose method to increase friction. This kind of anti-loosening method is to prevent the tightened threads from losing pressure due to external load changes, so there is always frictional resistance to prevent the connection from loosening. The anti-loosening methods to increase friction include installing spring washers and using double nuts.

4. Mechanical anti-loosening. This kind of anti-loosening method uses various stop parts to prevent the relative rotation of the thread and the parts to realize the anti-loosening. The mechanical anti-loose is more reliable, so it has more applications. Commonly used mechanical anti-loosening measures include split pins and groove nuts, non-return washers and round nuts, stop washers and nuts, and Shenlian steel wires.

5. Anti-loose method that cannot be dismantled. Using tack welding, spot riveting and other methods to fix the nut on the bolt or the connected part, the screw can be fixed on the connected part to achieve the effect of preventing loosening.

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