Extension springs are used in a wide variety of applications where a precise amount of force is required at a certain deflection. Extension springs are used to retract aircraft landing gear, to tether equipment to oil rigs in offshore applications, and on Class 8 heavy trucks as hood-assist springs to safely hold the hood in place for engine maintenance. Other examples include specialized springs implanted in roadways or around secure buildings to create barriers to provide additional protection from possible outside threats.
They can range dramatically in length (from 1/2-inch to 50 feet) and in the force they create (from a few ounces to thousands of pounds).
- Stock & OnDemand
Extension Springs Overview
Extension springs capture energy and develop force to execute an action. The “initial tension” is created during manufacturing when the wire is rotated backwards during coiling. When you pull the spring apart, you are undoing the rotation, which develops force or initial tension.
Tolerances for extension spring rates depend upon the body-diameter to wire-diameter but are usually +/- 10% and +/- 5% on the diameter. The initial tension is much more difficult to control and is offered as a reference value only.
Custom Extension Springs
MW specializes in custom fabrication of extension springs and has vast manufacturing capabilities beyond our competitors; whether you require a spring with extreme length, heightened performance, or quality certified products, we have you covered.
Our solutions approach is not limited to manufacturing. We specialize in prototyping, design, and tooling. We will work with your team and preferred specifications to assist you in developing the best spring for your application.
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Extension Spring Manufacturing
If you are looking for industry-leading expertise for extension springs, you’ve come to the right place. Our teams are comprised of experienced manufacturing technicians and engineering experts who are committed to developing the right products to suit your needs. Our experts can produce extension springs of various thicknesses and lengths using both cold and hot coiling processes.
Another advantage of working with MW is that we maintain stock of numerous alloys. The advantage is that if a couple of prototypes are needed, our in-house stock gives us the ability to develop them in a cost-effective way.
Our inventory is fully stocked and easily accessible ensuring fast shipping; however, if your needs are more custom, we offer a variety of treatment and finishing options made from either standard or specialty materials.
- Beryllium Copper
- Stainless Steel
- Steel (including: Chrome Silicon & Chrome Valadium)
- Titanium (Beta-C)
Our extension springs can be manufactured with a selection of commonly requested or specialty finishes.
- Black Oxide
- Gold Irridite
We produce extension springs from both bar and wire stock in a variety of thicknesses through both hot and cold coiling methods. More details are listed below:
Wire Type & Diameter
- Wire and Bar Stock: 0.008” – 0.750”
Direction of Helix (Wind)
We can configure your extension springs in either a left or right wind configuration to suit your specific application.