![](https://www.acxesspring.com/media/extension-spring-load-and-rate-formula-guide.jpg)
A guide on extension and tension spring design which includes design recommendations and the equations / formulas needed to achieve a reliable extension spring design.
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Compression Spring Manufacturers Suppliers
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In Stock Springs
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Extension Springs, Carbon & Stainless Steel Springs
![](https://www.springmasters.com/wp-content/uploads/2018/11/extension-springs.jpg)
UK Stock Springs - Springmasters
![](https://www.leespring.com/sites/default/files/inline-images/500x200-stock-springs.jpg)
In Stock Springs
![](https://www.springmancorp.com/wp-content/uploads/extension-springs-large.jpg)
Extension Springs - Spring Manufacturing Co.
![](https://www.springmanufacturer.com/wp-content/uploads/2021/12/lewisspringpic-768x460.jpg)
More Spring Manufacturer Listings
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A Guide to Spring Sizes
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Stock Compression Springs The Spring Store - Over 70 Trillion Custom & Stock springs
![](https://www.masterspring.com/wp-content/uploads/2021/03/200-032-3-Hardware-and-Fasteners-extension-1-1.jpg)
Custom Extension Springs & Expansion Springs
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Compression Spring Design Guide Custom and Stock Springs - Quality Spring, Affordable Prices
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Torsion Springs - Custom & Stock Torsion Springs
![](https://www.newcombspring.com/img/products/ext/extension-diagram.png)
Industrial Spring Corporation Extension Spring Technical, 51% OFF
![](https://ajaxsprings.com/wp-content/uploads/2017/01/extension-spring-ology-guide.jpg)
Custom Springs, Made-to-Order Springs
![](https://chinaspringcorp.com/static/picture/linear-extension-springs.jpg)
Linear Spring Rate - Quality Spring, Affordable Prices