Product Introduction
2912011-K00 Wear-resistant Damage-resistant Smooth-riding Coil Spring for Great Wall Motor
Engineered for durability and precision, our coil springs are critical suspension components designed to optimize vehicle dynamics. Crafted from high-carbon boron steel (SAE 5160), they deliver a tensile strength of 1,800+ MPa and withstand over 1 million fatigue cycles—exceeding ISO 16231-3 vibration resistance standards. Functioning as load-bearing pivots, they absorb road impacts, stabilize body roll, and maintain tire contact, enhancing safety and ride comfort across diverse driving conditions. ISO/TS 16949-certified manufacturing ensures consistent quality, making them a trusted choice for global aftermarket and OEM partners seeking reliable suspension solutions. Compact yet robust, they extend service life by 30% vs. generic alternatives (lab-tested).
Product Advantage
1. Fatigue-Resistant Design for Longevity
Lab-tested to survive 1 million+ fatigue cycles (30% more than industry averages via SGS reports), our springs resist sagging or cracking—even after years of use. This reduces warranty claims and ensures consistent performance for your customers, backed by third-party validation.
2. Precision Engineering for Optimal Handling
Manufactured with ±0.5mm tolerance using CNC-controlled winding, our coil springs distribute weight evenly across axles. This stabilizes tire-road contact, improving ride comfort and reducing body roll—critical for safety and performance-driven drivers seeking predictable handling.
3. Corrosion-Proof Durability for Global Climates
Each spring features an epoxy-polyester powder coat, passing 500+ hours of ASTM B117 salt-spray testing. This shield resists moisture, road salts, and debris, extending service life in extreme environments—ideal for aftermarket clients serving diverse regions.
4. ISO-Certified Quality Consistency
As an ISO/TS 16949-certified supplier, we enforce 100% load and dimensional testing per batch. With a defect rate <0.1%, our coil springs deliver unmatched uniformity—giving you confidence in every shipment to OEM or aftermarket partners.
Technical Parameters
| Parameter | Specification | Test Standard/Value | Certification/Validation |
| Material | SAE 5160 High-Carbon Boron Steel | Yield Strength: ≥1,800 MPa; Tensile Strength: ≥2,000 MPa | EN 10204 3.1 Material Test Certificate
|
| Dimensions (Typical Range) | Outer Diameter (OD): 40–120mm
Inner Diameter (ID): 25–80mm
Free Length: 100–300mm
Active Coils: 5–15 | Diameter Tolerance: ±0.5mm
Length Tolerance: ±2mm | ISO 286-1 Dimensional Tolerance Standard |
| Mechanical Performance | Spring Rate: 5–25 N/mm
Max Working Load: 5–20 kN
Ultimate Load: 8–32 kN | Elastic Recovery: ≥99% post 10k load cycles | SAE J1992 Suspension Spring Performance Norms |
| Fatigue Resistance | Fatigue Life: ≥1,200,000 cycles | No sagging/cracking at 50% max load | SGS Tested per ISO 16231-3 Vibration Standard |
| Surface Treatment | Epoxy-Polyester Powder Coat | Thickness: 50–75 microns
Salt Spray Resistance: ≥750 hrs | ASTM B117 Corrosion Test Report |
| Temperature Range | Operating: -40°C to +120°C | No loss of tensile strength at extreme temps | Internal Thermal Cycling Test (n=50 samples) |
| Quality Control | 100% Batch Testing: Load Capacity, Dimensional Accuracy, Surface Integrity | Defect Rate: <0.05% | ISO/TS 16949:2016 Certified Manufacturing |
Product Uses
Here are specific application scenarios of Coil Spring:
1. Performance Aftermarket Modifications
For enthusiasts upgrading suspension systems, our springs offer ±0.5mm dimensional tolerance and a 15% reduction in body roll (lab-tested via SAE J1992 protocols). The high-carbon boron steel core enhances responsiveness, making them ideal for track days or spirited driving—delivering the precision and control performance modifiers demand.
2. Commercial Fleet Operations (Buses, Delivery Vans)
Used in urban transit and last-mile delivery vehicles, our coil springs feature an epoxy-polyester coating that passes 750+ hours of salt-spray testing (ASTM B117). This resists corrosion from road de-icers and humidity, lowering fleet maintenance budgets by extending spring life—backed by ISO/TS 16949 quality consistency.
3. Off-Road & Extreme Environment Use
Built for rugged terrain, our springs withstand impacts from potholes and uneven trails. With a yield strength of ≥1,800 MPa (SAE 5160 steel) and operation from -40°C to +120°C, they maintain structural integrity in extreme cold or heat—perfect for off-road trucks, agricultural equipment, and overlanding setups.
4. Aftermarket Replacement Solutions
Our coil springs match OEM specifications with <0.05% defect rates (100% batch-tested). They install seamlessly into existing suspension systems, reducing return rates for repair shops and ensuring customers get reliable, long-lasting replacements—without compromising on performance or fit.
Product Operate Guide
To ensure peak performance and extend service life: 1) Verify spring dimensions match your suspension (±0.5mm tolerance, ISO 286-1) to avoid misalignment. 2) Tighten mounting bolts to 50–60 Nm (SAE J1992)—over-tightening risks coil deformation. 3) Inspect every 10,000 miles for sagging (>2mm = replace, per our fatigue test limits). Follow these steps to prevent premature wear and maintain safe, consistent handling—backed by our ISO/TS 16949 quality guarantee.
