Custom Extension Springs | Precision Tension Spring Manufacturer

Source high-performance springs directly from the experts. As a leading tension spring manufacturer, we bridge the gap between engineering prototypes and volume production. We deliver strictly tested custom extension springs—including stainless steel options—ensuring exact tolerances for your specific applications. Benefit from ISO 9001 & IATF 16949 certified quality, factory-direct pricing, and rapid turnaround times.

Start your project with confidence. Submit your specifications now and Get a Quote today.

Custom Extension Spring Manufacturing Specifications

We listed some of the most common custom extension spring manufacturer specifications, such as sizes, shapes, and materials. HengSheng Spring also provides fully customized production of all kinds of extension springs.

Whether a bulk order or a sample, we offer a customized service.
ISO9001 and IATF16949 certificated custom extension spring manufacturer.
We offer competitive prices based on our experienced engineers and advanced equipment.
Work with our engineers to optimize your spring designs and lower costs, our team can provide expert design assistance on any order.

Wire Size & Shape

0.08~35 mm in wire diameter
round wire
square wire
Rectangular Wire

Extension Spring Ends

round-end hook/loop
square-end hook/loop
v hook end
extended eye end
straight end
swivel end hook/loop
customize wire forming

Common Spring Materials

carbon steel
stainless steel
music wire
copper
non-ferrous metals
and more

If you’re creating a spring, reach out to our engineering team for assistance. We’ll ensure you’re connected with the appropriate expert who can provide the support you need.

20+ Years

Spring Manufacturer Experience

5000+㎡

Production Workshop

20+

Experienced Engineers

Unlimited

Custom Capabilities

Custom Extension Spring Manufacturing

Measure the spring wire diameter, preferably do it on the end
Measure the outside diameter of the body. Take the average value in the middle area of the body (O.D.).
Measure the length of the extension spring. The body length does not include the hook/loop ends.
Measure the free length of the extension spring , which include both hook/loop ends.
Measure the length of the hook/loop.
If the outside diameter of the loop or hook is different from the body, measure it too.
If the gap is important for assembly, measure it. It is the distance from the end of the wire to the spring body.

Verified Custom Extension Spring Manufacturers

As one of the largest custom extension spring manufacturers in China, we take pride in our ISO9001, IATF16949, and SGS certifications, which testify to our unwavering commitment to quality and excellence.

We provide a comprehensive suite of services, including the production of custom extension springs of all varieties, supported by state-of-the-art CNC extension coiling equipment. We offer prototyping and tooling assistance, ensuring that we can support you at every stage of the design and production process.

We’re dedicated to surpassing your expectations, delivering extension springs that are tailor-made to your exact specifications.

Some extension springs we have made

Brake Spring
Exhaust Spring
Hammock Spring
Pilates Spring
Bungee Cord End

Sign Stand Spring
Trampolines Spring
Hanging Spring
Tremolo Spring
Auger Spring

Swivel Ends
Loop Ends
V-hook Ends
Wire Forming Ends
Customize Ends

As an experienced custom extension spring manufacturer funded in 2003, over the past 21 years, we’ve manufactured tens of millions of diverse tension springs for clients worldwide. Whether you need a spring with exceptional length, superior performance, or certified quality products, we’ve got you covered.

Our approach extends beyond manufacturing to encompass prototyping, design, and tooling. Specializing in collaboration with your team and adhering to your preferred specifications, we’re dedicated to crafting the ideal spring for your application.

Contact Us

Need help with pricing, technical queries about springs, or any other product-related assistance?

Our team is equipped with sales professionals, design engineers, and manufacturing experts ready to address your needs. We’ll make sure you’re connected with the person most qualified to help.