A double-pad self-locking washer is a mechanical fastener commonly used to join bolts and nuts to prevent them from loosening or falling off during equipment operation. Double-pad self-locking washers are laminated from two sheets of metal, each with a raised “ear” that engages with each other to form a gear-like structure.

The double-pad self-locking washer has its own elasticity and does not need to use other fasteners, so it is simple and convenient to install. At the same time, the self-locking effect of the double-pad self-locking washer is reliable, and it has high anti-vibration and anti-shedding capabilities, and is suitable for various applications of vibration, shock and harsh environments.

Principle of double pad self-locking washer

The principle of the double-pad self-locking washer is to use its special shape and material to prevent the connection from loosening or falling off during the operation of the equipment. It’s usually made of two sheets of metal laminated together, each with a raised “ear” that snaps together to form a gear-like structure.

When the double-pad self-locking washer is fixed on the bolt or nut, during the fastening process, the double-pad self-locking washer will be compressed and generate sufficient pre-tightening force, which will make the connection firmly fixed. At this time, the elastic deformation of the double-pad self-locking washer will generate a reverse force, which is opposite to the rotation direction of the connecting piece, thereby achieving the purpose of preventing the connecting piece from loosening or falling off.

The double-pad self-locking washer is characterized by its own elasticity and does not need to use other fasteners, so the installation is simple and convenient. At the same time, the self-locking effect of the double-pad self-locking washer is reliable, and it has high anti-vibration and anti-shedding capabilities, and is suitable for various applications of vibration, shock and harsh environments.

What is the national standard for double pad self-locking washers?

The national standard for double-pad self-locking washers is GB/T 1040.3-2017 “Tensile Test Part 3: Tensile Test Method for Metal Materials at Room Temperature”. This standard specifies the main technical parameters and test methods of double pad self-locking washers, including Vickers hardness, tensile strength, elongation after break and other indicators.

In addition, double pad self-locking washers can also be produced and tested according to the standards of different industry fields. For example, in the automotive industry, double-pad self-locking washers need to comply with the relevant provisions of GB/T 96.1-2002 “General Technical Conditions for Automotive Fasteners”; in the aerospace field, double-pad self-locking washers need to meet GJB 2294A- Relevant requirements of 2001 “Classification, Basic Requirements and Test Methods of Fasteners for Aerospace”.

How to use the double pad self-locking washer?

Double pad self-locking washer is a commonly used mechanical part, usually used to fasten bolts and nuts to prevent them from loosening or falling off during equipment operation. Here’s how to use a double-pad self-locking washer:

Before use, please ensure that the selected double pad self-locking washer model and size match the bolts or nuts to be connected.

Place a piece of double-pad self-locking washer on top of the bolt or nut with its two raised “ears” facing up.

Then insert the bolt or nut into the mounting hole and place another piece of double pad self-locking washer on the bottom of the bolt or nut with its two raised “ears” facing down.

Tighten the bolts or nuts according to the required torque until the double-pad self-locking washers are compressed and produce sufficient pre-tightening force. At this time, the elastic deformation of the double-pad self-locking washer will generate a reverse force, so that the rotation of the bolt or nut is blocked, so as to achieve the purpose of self-locking.

It should be noted that when installing the double-pad self-locking washer, avoid bending or twisting it, so as not to damage its performance. In addition, a new double-pad self-locking washer should be replaced every time a bolt or nut is removed and reinstalled to ensure the reliability and stability of the connection.

What are the advantages of double pad self-locking washers?

Double pad self-locking washer is a commonly used mechanical part, mainly used to prevent the connection from loosening or falling off during the operation of the equipment. Its advantages include:

Good self-locking performance: The double-pad self-locking washer will generate sufficient pre-tightening force during the fastening process, and generate a reverse force through elastic deformation, thereby achieving the purpose of preventing the connection from loosening or falling off. Its self-locking performance is very reliable, and it is not easily affected by factors such as the environment and vibration.

Easy installation: the double-pad self-locking washer does not need to be used with other fasteners, it only needs to be placed on the bolt or nut, and can be installed directly. This installation method is very simple, fast and convenient.

Wide range of applications: double-pad self-locking washers can be used in fasteners of various mechanical equipment and components, such as automobiles, motorcycles, aerospace, ships, electrical equipment, etc. It has high self-locking effect and stability under various vibrations, shocks and harsh environments.

Economical and practical: Compared with traditional fasteners, double-pad self-locking washers are less costly and can be used repeatedly without compromising their performance. Therefore, it has higher economical practicability in mass production and long-term use.

What are the main uses of double pad self-locking washers?

The main purpose of double-pad self-locking washers is to connect bolts and nuts to prevent them from loosening or falling off during equipment operation. Double pad self-locking washers are widely used in machinery manufacturing, aerospace, automobile, electrical equipment and other fields.

Specifically, the application range of double-pad self-locking washers includes the following aspects:

Cars and motorcycles: In cars and motorcycles, double-pad self-locking washers are usually used to connect tire bolts, engine bolts, exhaust system bolts, etc., to ensure that the bolts will not loosen or fall off during the vehicle’s driving.

Aerospace: In the field of aerospace, double-pad self-locking washers are usually used to connect aircraft structural parts and equipment, such as aircraft shells, wings, engine brackets, etc., which can effectively prevent the joints from Loose or fall off.

Electrical equipment: In electrical equipment, double-pad self-locking washers are often used to connect cables, wires and other components to ensure the firmness and reliability of the connection.

Industrial equipment: In various industrial equipment, double-pad self-locking washers can prevent bolts and nuts from loosening or falling off under vibration and shock environments, ensuring safe operation of equipment.

What is the market prospect of double pad self-locking washers?

As a commonly used mechanical fastener, the double-pad self-locking washer has a good market prospect.

First of all, in the field of industrial manufacturing, with the continuous development of the global economy and the advancement of technology, the machinery manufacturing and equipment manufacturing industries are also growing. As an important part of mechanical fasteners, double pad self-locking washers will continue to be driven by market demand.

Secondly, in the fields of automobiles, motorcycles, aerospace, electrical equipment, etc., double pad self-locking washers also have a wide range of application requirements. With the rapid development of these fields, the demand for high-quality, high-precision mechanical fasteners will also continue to increase, which will provide more opportunities for the market of double pad self-locking washers.

In addition, the double pad self-locking washer has the characteristics of convenient installation and reliable self-locking effect, which can effectively prevent the connecting parts from loosening or falling off during the operation of the equipment, so it can bring higher safety and stability during use. This will also contribute to the increasing demand for double pad self-locking washers in the market.

To sum up, as a mechanical fastener, double-pad self-locking washers will still maintain high vitality and development potential in the future market prospects.