Six basic methods to prevent looseness of safety nuts, how many do you know?

Stainless Steel Bolts and Nuts

How to tighten a small safety nut has always been an enduring topic in mechanical design. Today we will talk about the most basic method of fixing safety nut at work.

1. Flatten the washer
Washer refers to the part between the connected piece and the nut. It is generally a flat metal ring, which is used to protect the surface of the connected piece from being scratched by the nut, and to disperse the pressure of the nut on the connected piece.

2. Spring washer
Spring washers are widely used in the load-bearing and non-load-bearing structures of general mechanical products. They are characterized by low cost and convenient installation, and are suitable for parts with frequent assembly and disassembly.

3. Self-locking nut
The general nut will loosen itself due to vibration and other reasons during use, such as vibration. In order to prevent this phenomenon, the self-locking safety nut was invented. The main functions of self-locking safety nuts are anti-loosening and anti-vibration.

For special occasions. Its working principle is generally self-locking by friction. The types of self-locking nuts classified by function include those with nylon rings, those with neck closures, and those with metal anti-loosening devices. They are all effective torque type locknuts.

4. Nut anti-loosening fluid

Apply the nut anti-loosening liquid to the tightened part of the bolt, and then screw on the nut to achieve the effect of anti-loosening.

5. Double nut (left and right rotation) to prevent loosening
It is also a good method to tighten and prevent loosening by cooperating with a left-hand nut and a right-hand nut.

6. Screw and nut drilling and pinning
In machinery, pins are mainly used for assembly positioning, and can also be used as overload shear connections in connection and relaxation level safety devices. The types of pins are: cylindrical pins, tapered pins, hole pins, cotter pins and safety pins.

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