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The extension spring is a flexible and reliable spring that absorbs forces and returns them when the load is pulled. This makes it ideal for a wide range of applications, from fine mechanical systems to heavy industrial installations.
As the name suggests, the extension spring is loaded on tow. Under the influence of force, the spring extends and, as soon as the force is lost, it returns to its original position. This makes tension springs ideal for applications where tension and sustainable performance are key.
To make the spring functional, snags or eyes are attached at the ends. These provide flexibility and safety, making the tension spring easy to install in a variety of systems — from small-scale mechanisms to robust industrial applications.
From offshore to the agricultural sector: Extension springs are indispensable in sectors where reliability and precision are crucial. In mechanical engineering, they ensure controlled movements in automation lines and safety mechanisms. In the offshore and marine sectors, they withstand harsh conditions such as corrosion and pressure, and are essential for valves and seals. In valves and pumps, tension springs ensure constant force and accurate repetition in sealing systems. In agrotechnics, they increase the robustness of agricultural machines by absorbing shocks and keeping parts stable. De Spiral provides customized solutions that continue to perform, even in the harshest environments.
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For standard extension springs, the delivery time is usually 2 to 5 business days. Custom tension springs are usually delivered within 2 to 4 weeks, depending on complexity and numbers. Express delivery and prototyping are also possible in consultation.
A tension spring is a coil spring that exerts force when stretched. Extension springs are used to pull parts together or to build up tension during extension, for example in ports, valves, switches and sports equipment.
The maximum strength and extension depend on the material, wire thickness and construction. We are happy to advise you on the optimal ratio between resilience, choice of materials and longevity for your application.
Yes, we supply tension springs in corrosion-resistant materials such as stainless steel and heat-resistant alloys such as Inconel. Finishes such as galvanizing or passivating are also possible for extra protection.
Yes, we design and produce custom tension springs with various hook ends, such as German eye, English eye, threaded eyes, hinged hooks or special end structures on request.
