Mechanical Extension Springs

Extension springs are based on resistance. They are tightly coiled springs that increase resistance as more force is used to pull it out, thereby extending the spring. The general purpose of extension springs is to return moving objects back to their starting positions. The object moves, extending the spring, and the resistance of the extension spring takes effect, pulling it back. This is exactly how a mechanical extension spring functions.

Of course, not all mechanical extension springs are alike. Even the hook or loop at the end of the spring, which one uses to mount the spring, may be a different style or shape depending on the needs or shape of the particular object you are hooking the extension spring to.

Mechanical extension springs are designed specifically for a height and weight of a product. The initial tension is the force that holds the coil together and must be exceeded to get the extension spring working. Although the standard initial tension is appropriate for most extension spring needs, initial tension can be customized for specific situations

contact us request a quote

Your Source for Mechanical Extension Spring Replacements

If you need new mechanical extension springs, or you require mechanical extension spring replacement, contact IDC Spring immediately. We can help you with any of your mechanical extension spring questions and provide you with a free estimate for your new or replacement extension springs.

Available Extension Springs and Wire Types

  • Hard Drawn
  • Oil-tempered
  • Galvanized
  • Music Wire
  • Stainless Steel
  • Chrome Silicon

Available Wire Sizes

  • .080” – .625”

Additional Services

  • Stenciling
  • Painting
  • Shot peening
  • Custom ends
  • Powder coating

Available Extension Spring Clip Ends

As you will recall, extension springs must be attached to other moving parts in order to do their job, and different parts may require different types of attachment methods. There is a wide variety of clip ends for your extension springs. They are typically made by bending the end of the extension spring wire into the desired shape. We can provide you with the following ends for your extension springs:

Single Open Loop
Double Loops
Clip Ends (std on .207 wire & larger)





If you don’t know what kind of extension spring ends you need, just give us a call at 800-899-7945 to describe your project, and one of our experts should be able to help you.

Standard Spring Extension Applications

Remember, a quality mechanical spring starts with quality parts, and that includes the best extension springs you can find. IDC Spring has a reputation for making quality springs that goes back decades. Ours is a name you can trust to provide you with high-performance, long-lasting springs at a reasonable price. We will make it right for you!

Request a quote on the mechanical extension springs you need, or, if you’re not sure what kind of extension springs and/or extension spring ends you will need, contact us to learn more.

contact us request a quote

Orders are subject to extended lead times due to COVID-19 and related constraints