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Linyi Shunda Spring Co., Ltd.
Professional Manufacturer of Springs & Spring Components in Shandong, China
Leaf Springs
Torsion Springs
Compression Springs
Extension Springs
OEM & ODM
Address: Hedong District, Linyi City, Shandong Province, China
Founded: May 18, 2012 | Enterprise Type: Manufacturing Enterprise | Status: Active
OEM & ODM Accepted
High Precision
Durable
Global Export
Company Overview
Established in 2012, a professional spring manufacturer with over 12 years of experience in R&D and production.
Located in Linyi, Shandong Province, a major logistics and industrial hub in northern China.
Specialized in manufacturing various types of springs including coil springs, leaf springs, torsion springs, compression and extension springs.
Uses high-quality spring steel and advanced heat treatment processes to ensure consistent performance and long life.
Provides precision springs for automotive, agricultural machinery, industrial equipment and household appliances.
Products widely used in suspension systems, engine components, valves, clutches, and mechanical assemblies worldwide.
Core Products
| Category | Main Equipment | Features | Applications |
|---|---|---|---|
| Coil Springs | Compression springs, extension springs, torsion springs | High elasticity, fatigue resistance, precise dimensions | Automotive suspension, industrial machinery, electronics |
| Leaf Springs | Multi-leaf springs, parabolic springs, tapered springs | High load capacity, good shock absorption, long service life | Trucks, trailers, railway vehicles, agricultural equipment |
| Wire Springs | Formed wire springs, double torsion springs, conical springs | Custom shapes, consistent force, corrosion resistant | Medical devices, aerospace, electrical components |
| Precision Springs | Micro springs, constant force springs, spiral springs | Tight tolerances, stable performance, high reliability | Instrumentation, robotics, precision tools |
Production Equipment
• Automatic CNC spring coiling machines (wire diameter 0.2-12mm)
• Fully automatic heat treatment furnaces with temperature control system
• Precision grinding and end forming equipment
• Shot peening and surface treatment lines
• Fatigue testing machines and load deflection testers
• Optical inspection system for dimensional accuracy
Quality & Certifications
Strict quality control system from raw material inspection to finished product testing.
100% load and fatigue test for every batch before shipment.
Uses certified spring steel from reputable domestic steel mills.
Complies with ISO9001:2015 quality management system.
Complete traceability records for all export orders.
Professional QC team ensures consistent product quality.
Technical Advantages
– In-house R&D team with extensive experience in spring design and material selection.
– Advanced heat treatment technology improves fatigue life by 50% compared to standard springs.
– Precision coiling and forming ensures tight tolerances (up to ±0.05mm).
– Custom coating and surface treatment for corrosion and wear resistance.
– Capable of manufacturing complex spring geometries per customer drawings.
– Continuous process optimization for heavy-duty and high-cycle applications.
Cooperation & Trade Terms
MOQ: 1000 pcs for standard springs; negotiable for custom designs
Lead Time: 10-20 working days for standard products
Payment Terms: T/T 30% deposit, 70% before shipment; L/C accepted
Delivery Terms: FOB Qingdao, EXW Linyi, CIF available
Warranty: 12 months warranty + lifetime technical support
Packing: Standard export carton + pallet, or as per customer requirement
Service & Support
Free technical consultation and spring design assistance for global customers.
Customized production based on customer drawings, samples, or specifications.
Online installation guidance and remote technical training available.
24/7 after-sales service with quick response to inquiries.
Sufficient stock of common spring types for fast delivery.
Long-term service commitment with regular quality follow-up.
Market & Customers
Long-term supplier for domestic agricultural machinery and automotive parts manufacturers.
Products sold to major industrial regions across China.
Exported to Southeast Asia, Middle East, Europe, and South America.
Supplied 500,000 pcs of valve springs to a tractor factory in Vietnam in 2024, with zero defect rate.
Developed custom torsion springs for a German automotive tier-1 supplier in 2025, meeting DIN standards.
Won high recognition and repeat orders from global customers.
Why Choose Us?
12+ years of professional experience in spring manufacturing industry.
Factory direct sales offering competitive prices and high cost performance.
High-quality springs with excellent durability, precision and consistency.
Strong customization capability to meet diverse project requirements.
Complete export documentation and reliable after-sales support.
Stable delivery time and long-term trustworthy partnership.