Extension Springs for Off Applications - DDM Garage Doors Blog

Posted August 17th, 2017 at 4:11 pm by Dan Musick

Some look for extension springs to use for a project other than for a garage door. Therefore, you’ll need to calculate the pull needed when the spring is fully extended. For example, if you want to ease the lift of a 300-pound object. Then, you will need an extension spring that pulls 300 pounds when it is fully extended. A 25-inch spring that pulls 300 pounds on a 7-foot high door does not pull 300 pounds until it is stretched 42 inches beyond its original length of 25 inches. The total extended length of the spring would then be 67 inches.

An image of different types of extension springs.
A small part of our garage door spring inventory

Here are two variations to consider. If you cut the 300-pound lift extension spring in half, it would pull 300 pounds when stretched only 21 inches. However, if you pull the same 25-inch spring just 21 inches, it will pull only 150 pounds. If you determine what you need for your special application, we can usually find a solution.

Please contact us with any questions that you may have.

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2 Responses to “Extension Springs for Off Applications”

  1. Craig Banning Says:

    We need to re-order springs we have purchased from you before. Ordering seems a little different now.
    We previously ordered: OPS-075-207-43-50-OL-OL, and these worked for our use.
    We would like to order 3 more of the same.

    One-Piece Extension Spring: 0 3/4″ ID, 0.2070″ wire, 43.5″ long, Top End: Open
    Loop, Bottom End: Open Loop

  2. Caleb Penney Says:

    Hello Craig! You can find the springs you are looking for through this link: https://ddmgaragedoors.com/springs/one-piece-garage-door-extension-springs.php?act=search&idNum=0&idFra=0.75&wire=0.2070&length=43.5&ends=OL&ends2=OL

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Huge inventory of torsion springs for same or next day shipping! Here you will find all you need in the most common sizes of 1 3/4," 2," 2 1/4," and 2 5/8" inside diameter springs. Larger 3 3/4" and 6" inside diameter commercial and industrial springs may require a day or two to ship. You'll also find TorqueMaster Springs, Extension Springs, Self-Storage door springs, steel rolling door springs and springs for one piece single panel doors.

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