Top 7 Tension Spring Suppliers In China.

I’ve pulled together everything you need to know about tension springs and how to find the right partner in China. First, I explain what tension springs are and why China often offers the best combination of price and quality, complete with tips on how to spot a Spring supplier. Next, I share the exact criteria I use to vet manufacturers. Then you’ll meet seven standout Chinese suppliers, complete with their specialties and certifications. Finally, I walk you through my step-by-step process for testing samples, auditing factories, and securing clear shipping agreements, so you never face delays or surprises.

What Are Tension Springs?

Tension springs, also known as extension springs, store energy when pulled and release it as they return to their original length. They work based on Hooke’s Law, which says a spring’s force is proportional to how far you stretch it. You can find tension springs in garage doors, trampolines, seatbelts, and various types of machinery where pulling force is required.

Why I Source from China

I lean on Chinese factories because they run at a massive scale, which drives down my per‑unit cost. I also see heavy investment in modern coiling machines and automated testing, so quality rarely slips. Plus, when I order from a wholesale tension Spring supplier, I unlock bulk discounts and faster turnaround times thanks to streamlined production lines.

How I Evaluate Suppliers

I follow a clear checklist to make sure I get reliable springs every time:

1. Certifications: I look for ISO 9001 and IATF 16949 certificates to confirm their quality management systems.

   
   

2. Material Testing: I verify that they produce springs from stainless steel, music wire, or specialty alloys and demand lab reports for each batch.

   
   

3. Customization: I ask if they can meet my exact load and dimensional specs, because off‑the‑shelf doesn’t always cut it.

   
   

4. Pricing & MOQ: I compare minimum order quantities and tiered pricing to find the sweet spot for my budget.

   
   

5. Lead Times: I check typical turnaround—from prototype to full run—and confirm they can ship on schedule.

   
   

Meet 7 Leading Tension Spring Suppliers in China

1. Ningbo Leke Import And Export Co., Ltd

   Based in Ningbo City, Zhejiang, they produce tension, compression, and battery springs under strict quality control and hold several patents for unique spring designs.

   
   

2. XULONG SPRING

   Operating since 1979, XULONG makes custom wire forms and tension springs (0.1–60 mm wire) in dust‑free workshops. They maintain IATF 16949 certification for automotive precision.

   
   

3. HengSheng Spring

   Founded in 2003, HengSheng passed ISO 9001 and IATF 16949 audits and holds over 20 patents for heavy‑duty and specialized spring solutions.

   
   

4. Dongguan Haocheng Metal Spring Co., Ltd.

   This Dongguan factory covers 10,000 square meters with over 100 CNC machines, producing precision tension springs for automotive and industrial clients.

   
   

5. Huansheng Import and Export Co., Ltd.

   Located in Hebei, Huansheng focuses on industrial tension springs backed by strong R&D and modern production lines.

   
   

6. Yueqing DoFo Spring Manufacturing Co., Ltd.

   ISO 9001-certified since 1998, DoFo Spring produces stainless steel tension springs in volumes exceeding one million pieces per month.

   
   

7. Wenzhou Heli Spring Manufacturing Co., Ltd.

   A China Spring Professional Association member since 1992, Heli Spring makes wire‑forming springs from 0.08 mm to 12 mm and offers complete custom services.

   
   

How I Pick the Right Partner

1. Order Samples & Datasheets: I test spring rate, material, and dimensions before large orders.

   
   

2. Audit or Video‑Tour the Factory: I verify equipment, QC labs, and cleanliness to match their claims

   
   

3. Negotiate Quality Agreements: We set clear acceptance criteria and defect thresholds in writing.

   
   

4. Finalize Logistics Plans: I lock in Incoterms, shipping schedules, and packaging standards to avoid last‑minute rush fees.

   
   

Conclusion

By knowing exactly what tension springs do, why China often delivers the best balance of cost and quality, and following a step‑by‑step vetting process, I consistently find reliable partners. With these tips and the seven suppliers above, you’re set to secure high‑performance springs without headaches or hidden costs.