Extension Springs

Spring Dynamics manufactures extension springs for a variety of industries and applications. Each spring design is engineered to function in whatever assembly our customer needs. In order to ensure the whole assembly works in harmony, Spring Dynamics works to understand the end use for each spring and incorporate that knowledge into the customer’s design.

Our extension springs are manufactured using the latest in CNC machinery and we have the capability to produce springs of all sizes and with a wide variety of loops or enclosures at each end.

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Extension Spring Specifications
Wire Size .012 - .22” gauge
End Forms Full cross loops, side loops, double twisted full loops, rectangular, teardrop
Materials Music Wire
Oil Tempered
Chrome Silicon
Chrome Vanadium
302 Stainless Steel
304 Stainless Steel
17-7 Stainless Steel
Phospher Bronze
Beryllium Copper


Spring Dynamics produces extension springs for a wide variety of applications, such as automotive pedal assemblies, relied upon to assure many years of safe, reliable performance.

Extension Spring Case Study

Problem: A customer was building an assembly that used a pretty basic extension spring. A problem occurred, however, when the line worker would try to pull a piece from its package to use. The hooks on the spring were making them grab on to each other, just like a Barrel-Of-Monkeys! This was unacceptable. The extra time it took the worker to separate parts, and the inherent damage that the tangling caused, were far too costly for the customer to absorb.

Solution: The spring had been designed to work flawlessly, but without the forethought of assembly. Spring Dynamics’ engineers looked at the process, saw how the part was being assembled for themselves, and sprung into action. They re-designed the end hooks of the part to be a completely closed loop, eliminating the possibility of tangling in the box!

Results: With the new design implemented, the customer quality group was satisfied. The tangling had been eliminated, and at a miniscule cost impact. The part ran only slightly slower than it had before, and the added raw material needed to make the part was so miniscule that the piece price didn’t even have to increase.