What is a tension spring?

What is a tension spring?

Tension springs are wound helical coils that are wrapped tightly together to create tension. Also called extension springs, tension springs provide extended force when the spring is pulled apart from its original length.

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Since its establishment, the company has been taking the road of professional development, and has established long-term cooperative relations with well-known domestic auto parts manufacturers. High trust!


We have a patent certificate for springs, and have the ability to develop products together with customers. Some products can provide free samples to customers.


We have 30 years of manufacturing and R&D experience. It has passed the IATF 16969 automotive quality management system, and has more than 200 sets of professional spring equipment, which can guarantee the quality.

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about Heli Spring

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Wenzhou Heli Spring Manufacturing Co., Ltd. was founded in 1992. It is a high-quality spring manufacturing enterprise integrating design, production, sales and service. The current products include: compression springs, torsion springs, extension springs, auto parts springs, wire forming springs and spring sheets, etc.

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What is the difference between a compression spring and a tension spring?

Although a tension and compression spring are both helical coiled springs, the difference in their functionality and purpose can be significant. In essence, tension springs are designed to bring components together, whilst compression springs are made to keep components apart.

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Frequently Asked Question

Do you have any question?

The main function of tension springs is to allow for an outside force to create tension, and then use this energy to pull the components back together by reverting to its original shape. Tension springs are typically wound very tightly and are coiled closely together when at rest.

Extension springs with a high amount of tension, therefore taking a strong load to extend it. Also known as heavy duty tension springs.

The main difference is that tension springs are meant to hold two things together while compression springs are designed to keep components from coming together. While they work in opposition with each other, they are both necessary for different products.

There are many types of materials for tension springs, which can usually be selected according to factors such as the environment of use, the required elasticity and corrosion resistance. Here are some common spring materials: Steel: Steel is one of the most commonly used spring materials, has high strength and hardness, and performs well in high temperature and high pressure environments. Stainless steel: Stainless steel has excellent corrosion resistance and is often used in applications where oxidation and corrosion resistance is required. Cobalt alloys: Cobalt alloys have very high elasticity and wear resistance, and are commonly used in applications in high temperature, high pressure and strong corrosion environments. Copper: Copper spring has good electrical and thermal conductivity, and is commonly used in electronic devices, communication equipment and other occasions. Titanium alloy: Titanium alloy has light weight, high strength and excellent corrosion resistance, and is commonly used in aviation, aerospace and other fields.

The elastic coefficient of a spring is the ratio of stress to strain due to tension or compression per unit length, usually expressed in terms of elastic modulus E. The modulus of elasticity is an intrinsic physical quantity of a material and is related to the geometry of the spring and the material. The greater the elastic coefficient of the spring, the better its elasticity, and the smaller the amount of deformation per unit length.

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