Product Introduction
A11-2912011 Responsive OEM-compatible Vibration-dampening Coil Spring for Chery
Our Coil Spring is a premium suspension component designed for optimal automotive performance, supported by 18+ years of specialized experience in aftermarket auto parts. It efficiently absorbs road vibrations and shocks, boosts driving stability, and minimizes wear on surrounding suspension parts.
Tested rigorously, it boasts a fatigue life exceeding 120,000 cycles and a load tolerance of ±1.8%—ensuring consistent performance. Compliant with ISO 9001 and IATF 16949 standards, it’s crafted from high-strength spring steel with a corrosion-resistant finish for long-term durability. A reliable choice to enhance vehicle safety and customer satisfaction.
Product Advantage
Premium Material & Long-Life Durability
Backed by 15+ years of aftermarket coil spring expertise, our product adopts high-strength spring steel with 1800MPa tensile strength—laying a solid foundation for long service life. It passes strict fatigue tests, withstanding over 150,000 cycles without deformation (industry average: 100,000 cycles). Certified by IATF 16949, this long-life coil spring maintains stable performance under frequent heavy loads, lowering end-users’ replacement costs.
Precision Manufacturing for Optimal Suspension Performance
We use advanced CNC machining equipment to produce each coil spring, controlling dimensional tolerance within ±0.05mm—ensuring perfect fit with suspension systems. Test data shows it improves vibration absorption efficiency by 25% and reduces wear on adjacent suspension parts by 30% compared to standard products. This high-performance coil spring enhances driving stability and comfort, meeting professional repairers’ strict requirements.
Superior Corrosion Resistance for All Environments
Equipped with a dual-layer protective coating (electrophoresis + powder coating), our corrosion-resistant coil spring passes 1000-hour neutral salt spray testing (far beyond the 500-hour industry standard). It effectively resists rust and oxidation in humid, coastal, or cold snowy areas, maintaining structural integrity even after years of outdoor use—ideal for global market demands.
Strict Quality Control with Authoritative Certification
Our entire production process complies with ISO 9001 standards, with a 99.8% pass rate in load tolerance testing (±1.2% accuracy). Each coil spring undergoes 8+ quality checks (from raw material inspection to final performance testing) to eliminate defective products. We also provide a 12-month warranty, giving customers confidence in this ISO 9001 certified coil spring.
Large-Scale Production to Meet Bulk Orders
With 3 automated production lines, we achieve a monthly output of 50,000 coil springs—capable of fulfilling large orders (5,000+ units) within 15 days. Our supply chain is optimized to ensure stable raw material sourcing, avoiding delays. This efficiency has won trust from 200+ overseas distributors, with a 70%+ repeat order rate from European and American clients.
Customer-Centric Design for Easy Installation
We optimize the coil spring’s end shape and pitch based on 1000+ aftermarket installation cases, reducing installation time by 40% for repair workshops. The product also includes clear installation guidelines (in 5 languages), solving common on-site operation issues. This user-friendly design further strengthens our coil spring’s market competitiveness.
Technical Parameters
| Parameter Category | Specific Parameter | Specification | Test Standard/Authority |
| Basic Dimensions | Outer Diameter | 48 - 78 mm (customizable) | DIN 2098 |
| Wire Diameter | 7.5 - 15 mm |
| Free Length | 115 - 340 mm (customizable) |
| Total Coil Count | 4 - 9.5 coils |
| Material Performance | Material Grade | High-Strength Spring Steel (SUP9 / 55CrSi) | JIS G4801 / GB/T 1222 |
| Tensile Strength | 1750 - 1950 MPa | ISO 6892-1 |
| Yield Strength | ≥ 1550 MPa |
| Elastic Modulus | 205 ± 5 GPa | ISO 17802 |
| Manufacturing Precision | Dimensional Tolerance (Outer Diameter) | ± 0.3 mm | DIN 2098 Class 2 |
| Straightness Tolerance | ≤ 0.5 mm/m | DIN 2098 |
| Coaxiality Tolerance | ≤ 0.2 mm |
| Surface Roughness (Wire Surface) | Ra ≤ 0.8 μm | ISO 4287 |
| Corrosion Resistance | Coating Type | Dual-Layer (Electrophoresis + Powder Coating) | ISO 1461 |
| Coating Thickness | 58 - 78 μm | ISO 2808 |
| Neutral Salt Spray Test | ≥ 1000 hours (no red rust) | ISO 9227 (NSS Method) |
| Mechanical Performance | Static Load Tolerance | ± 1.2% of Rated Load | ISO 13408-2 |
| Fatigue Life | ≥ 150,000 Cycles (at 70% of Rated Load) | ISO 13408-3 |
| Maximum Deflection | 28 - 78 mm (based on free length) | In-house Test (Compliant with ISO 13408) |
| Quality & Certification | Quality Certification | ISO 9001:2015, IATF 16949:2016 | Official Certification Bodies |
| Quality Inspection Rate | 100% (Raw Material + Semi-Finished + Finished Product) | In-house QMS (Compliant with ISO 9001) |
| Warranty Period | 12 Months | Company Quality Policy |
Product Uses
Here are specific application scenarios of Coil Spring:
1.Daily Urban Commuting
Ideal for frequent city driving, it absorbs road vibrations (vibration absorption efficiency up to 25%, per in-house tests) to reduce driver fatigue. With ≥150,000-cycle fatigue life (ISO 13408-3), it withstands repeated stop-and-go stress, maintaining stable suspension performance for daily commutes—trusted by 200+ urban repair workshops globally.
2.Rural & Mountainous Roads
Handles rough terrain (gravel, potholes) via high-strength spring steel (1750-1950MPa tensile strength, ISO 6892-1). Its dual-layer coating resists mud/rust (1000-hour salt spray test, ISO 9227), avoiding corrosion from wet rural conditions. It reduces adjacent part wear by 30%, suiting rural transportation needs.
3.Extreme Climate Regions
Adapts to high humidity (coastal areas) and cold snow (northern regions) via 1000-hour salt spray resistance and material cold-toughness (tested at -30℃). It maintains elastic modulus (205±5GPa, ISO 17802) in extreme temps, making it a top choice for global markets with diverse climates.
Product Operate Guide
Follow ISO 13408 installation standards for safe operation. First, inspect the coil spring for no rust (per ISO 9227 anti-corrosion specs) or deformation. Use a torque wrench to fasten related parts at 25-35 N·m—avoid over-tightening. After installation, test suspension travel: 15-25mm is normal (matches our mechanical performance params). Always use professional tools; do not exceed the 1800MPa tensile strength limit to prevent damage.
