Quick Guide to Extension Springs

Extension Springs Explained

Extension springs can be found in thousands of diverse applications. Let’s take a look at what they are, what they are made of, and where you can find extension springs.

What are Extension Springs?


Extension springs stretch as the load is applied. What does this mean? When an extension spring goes from a resting position to an extended position, it will exert an opposing force in proportion to its change in length. Meaning that when the spring is stretched it will exert a force to return to its resting position.

Typically, extension springs are attached at both ends, and as the parts, it is attached to move apart the extension spring works to bring them together again. The resting, or initial, the tension on the spring can be manipulated by how tightly the spring is coiled.

What are Extension Springs Typically Made Of?

Like all types of springs, there are a number of options for construction material. The material an extension spring is manufactured from is often chosen to have a specific impact on the resting tension. Construction materials can range from steel, stainless steel, and nickel 205 to various standards and superalloys.

Common Applications

Extension springs are versatile and can be manufactured in a wide range of sizes to meet a diverse set of application needs. Extension springs can be found in applications as diverse as brake springs to delicate medical devices. Other common applications include garage door assemblies, automotive applications, and more.

Learn More Plymouth Spring has been manufacturing custom springs for over half a century. Over that time our focus has been and continues to be, quality products manufactured efficiently. Contact us to learn more about our custom spring capabilities, to discuss your custom spring applications, and let our experienced engineers help you find the ideal solution for your application.
Scroll to Top