At Master Spring, we’ve been helping OEMs with their needs concerning large and small extension springs for more than 70 years. Learn how we can design and manufacture custom extension springs for your next application by calling us at 708-202-9545 today
Contact us today for a free quote.
The diagram to the right illustrates the dimensions of an extension spring. The notes below list abbreviations for the dimensions and calculations for some of the dimensions. The diagram and notes are from the Spring Manufacturers Institute Handbook of Spring Design.
Need an extension spring custom built to your exacting needs? Master Spring has the design and manufacturing capabilities to match. We have a wide range of CNC spring forming machines that can manufacturer custom extension springs with wire diameters as small as 0.010” or as large as 0.250” (0.25 mm to 6.4 mm) and any size wire in between.
We manufacture custom extension springs from all types of material. The most common material types for extension springs are stainless steel (type 302, type 316 and type 17-7 PH), music wire and hard drawn.
You can learn about the suitable uses of each material type in the Properties of Materials chart.
Common helical spring ends are twist, cross center, side loops, German hooks and extended hooks. We also manufacture swivel hooks, flat stock hooks, and more for extension springs (see the figure of Common End Configurations for Helical Extension Springs per Spring Manufacturers Institute Handbook of Spring Design to the right).
What information does Master Spring need to quote your extension spring? Download the checklist by clicking on the image to the left to make sure you specify the critical dimensions of your extension springs. For help with your extension spring design, please call us at 708-453-2570.
Download the PDF file of the checklist here.
Master Spring has been manufacturing custom helical extension springs for OEMs since 1945. Request a quote today for extension springs engineered to meet your requirements.
At Master Spring and Wire Form, we have the capability to design and manufacture a wide variety of extension springs. We specialize in supplying OEMs their requirements of medium to high quantities of springs and wire forms. Browse our gallery of custom extension springs or read our extension springs product page to learn about our capabilities.
Manufacturing Springs for Outdoor Power Equipment
Learn how a suggested design change increased the spring's life cycle and reduced the customer’s cost. This customer orders 55,000 of these extension springs per year.
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