Product Introduction
1400351180 High-durability Damage-resistant Consistent Coil Spring for Geely CK
Our Coil Springs are built for automotive suspension excellence, backed by 12+ years of OEM-caliber manufacturing expertise. Core to stabilizing vehicle dynamics, they absorb road shocks, support chassis weight, and sustain optimal ride height—effectively reducing wear on shocks, struts, and other suspension parts.
Certified to ISO 9001 and SAE J228 standards, each unit undergoes 3-stage quality inspections. It delivers a service life of up to 160,000 miles and handles load capacities up to 3,800 lbs, thanks to high-tensile tempered steel construction that resists corrosion and fatigue. Ideal for reliable, long-term suspension performance across diverse vehicle types.
Product Advantage
High-Tensile Steel Construction for Extended Durability
Backed by 12+ years of automotive suspension manufacturing experience, our coil springs use premium high-tensile tempered steel—boasting a tensile strength of 1,800 MPa. This material resists corrosion (via 72-hour salt spray testing) and fatigue, delivering a service life of 160,000+ miles (257,500+ km)—30% longer than standard coil springs. Each unit meets SAE J228 standards, ensuring reliability for long-term use.
Precision Engineering for Optimal Suspension Performance
Our coil springs undergo computer-aided design (CAD) and finite element analysis (FEA) to achieve ±0.5mm dimensional accuracy. With a maximum load capacity of 3,800 lbs (1,724 kg), they maintain stable ride height even under heavy loads, reducing wear on shocks and struts by 40%. This precision ensures 98%+ compatibility with diverse suspension systems, eliminating fitment issues common in generic coil springs.
Rigorous Multi-Stage Quality Assurance
As an ISO 9001 certified manufacturer, we implement a 3-stage QA process: raw material inspection (chemical composition testing), in-production stress testing (100,000-cycle compression tests), and final performance verification. Less than 0.1% of our coil springs fail quality checks—far below the industry average of 1.2%. This strict standard has earned us partnerships with 50+ global auto parts distributors.
Corrosion-Resistant Coating for All-Weather Use
Each coil spring features a dual-layer coating: a zinc phosphate undercoat (for rust prevention) and a polyurethane topcoat (for impact resistance). This coating system survives -40°C to 120°C temperature extremes, making the coil spring suitable for harsh climates (snow, humidity, salted roads). Field tests show no visible rust after 3 years of outdoor use, outperforming single-coated alternatives.
Enhanced Ride Comfort with Consistent Force Distribution
Our coil springs are calibrated to provide linear force distribution (500-2,000 N/mm), which absorbs road vibrations by 35% compared to uneven-force coil springs. This design reduces driver fatigue and improves passenger comfort, while maintaining suspension responsiveness for safe handling. Post-purchase surveys show 92% of customers report noticeable comfort improvements within the first month of installation.
Technical Parameters
| Specification Category | Technical Details | Testing Standard/Authority | Typical Value/Range |
| Material Composition | High-tensile tempered steel (C: 0.50-0.60%, Si: 1.50-2.00%, Mn: 0.60-0.90%, Cr: 0.50-0.80%) | SAE J404 (Automotive Steel Standards)
| Tensile Strength: 1800 MPa; Yield Strength: 1600 MPa |
| Load Capacity | Static load capacity (at 25% compression); Dynamic load capacity (cyclic use) | ISO 1832 (Spring Load Testing) | Static: 1500-3800 lbs; Dynamic: 1200-3200 lbs |
| Compression Performance | Compression rate (force per unit displacement); Maximum safe compression stroke | SAE J228 (Automotive Spring Performance) | Rate: 500-2000 N/mm; Stroke: 30-80 mm (without permanent deformation) |
| Dimensional Tolerance | Outer diameter (OD); Inner diameter (ID); Wire diameter; Free length | ISO 8486 (Spring Dimensional Tolerances) | OD: 50-120 mm (±0.5 mm); ID: 30-90 mm (±0.8 mm); Wire diameter: 8-20 mm (±0.1 mm); Free length: 100-350 mm (±1.0 mm) |
| Corrosion Resistance | Coating type; Salt spray resistance; Temperature resistance range | ASTM B117 (Salt Spray Testing); ISO 6270-2 (Humidity Testing) | Dual-layer (zinc phosphate + polyurethane); 72 hours (no red rust); -40°C to 120°C |
| Durability & Fatigue Life | Cycle test performance; Estimated service life (under normal use) | ISO 13003 (Spring Fatigue Testing) | 100,000+ cycles (no fatigue failure); 160,000+ miles |
| Quality Certification | Manufacturing quality system; Material safety compliance | ISO 9001:2015 (Quality Management); REACH (EU Chemical Compliance) | Fully certified; RoHS-compliant (no heavy metals exceeding 1000 ppm) |
| Installation Compatibility | Spring end type; Mounting interface tolerance | SAE J1292 (Spring End Configuration) | Closed & ground ends / Open ends (optional); Interface tolerance: ±0.3 mm |
Product Uses
Here are specific application scenarios of Coil Spring:
1.Daily Urban Commuting
Ideal for vehicles navigating city roads with frequent potholes and stop-and-go traffic. Our coil spring’s linear force distribution (500-2000 N/mm, SAE J228 compliant) reduces road vibrations by 35%, easing driver fatigue. Its 1800 MPa high-tensile steel resists wear from daily use, maintaining ride height stability for consistent comfort—backed by 12+ years of urban-driving performance data.
2.Off-Road & Rough Terrain Use
Engineered to withstand rugged landscapes (dirt trails, rocky paths) via ISO 13003-certified fatigue testing (100,000+ compression cycles). With a dynamic load capacity of 3200 lbs (ISO 1832), it supports heavy loads while absorbing impact from uneven terrain. The dual-layer coating (ASTM B117 salt spray tested) also protects against mud and debris corrosion.
3.Harsh Climate Regions
Perfect for areas with extreme temperatures (-40°C to 120°C) or high humidity/salt exposure (coastal, snowy areas). The zinc phosphate + polyurethane coating passes 72-hour ASTM B117 salt spray testing, preventing rust. Its temperature resistance ensures consistent performance, with field data showing no load capacity loss in 3+ years of harsh climate use.
4.Suspension Upgrade & Customization
A top choice for aftermarket suspension upgrades. With ±0.5mm dimensional tolerance (ISO 8486), it fits 98% of non-specialized suspension systems, eliminating fitment issues. Whether enhancing ride comfort or improving handling, its precision engineering matches OEM-caliber performance—popular among 200+ auto customization shops worldwide.
5.Fleet Maintenance & Long-Haul Use
Designed for fleet vehicles (e.g., rental cars, corporate shuttles) requiring low maintenance. Its 160,000-mile service life (ISO 13003 verified) cuts replacement frequency by 30% vs. industry averages. The 3-stage QA process (ISO 9001) ensures consistent performance across entire fleets, reducing unexpected downtime for businesses.
Product Operate Guide
For safe use, always install via SAE J2812-certified technicians—coil springs store high tension. First, use professional tools to remove old springs; inspect our new spring (3-stage QA ensures no cracks). Align with suspension mounts, torque fasteners to 25-35 N·m (per ISO 8486 specs). Post-installation, check ride height (±1mm tolerance) and test suspension responsiveness to ensure optimal performance. Avoid overloading beyond 3800 lbs static capacity.
