30-1/2" Multi Leaf Spring 7 Leaves 3/8" Thickness Precision Trailer Suspension

1. Product Overview  

• Product Name:  Heavy-Duty Trailer Leaf Spring (Multi-Leaf Slipper/Double-Eye Spring) 

• Application : Heavy-duty utility trailers, flatbeds, dump trailers, and commercial agricultural equipment 

2. Technical Specifications & Dimensions 

3. Material & Construction Details  

• Material / 材质: High-Grade Spring Steel (e.g., SAE 5160 / SUP9 or equivalent high-tensile alloy) / 高强度弹簧钢（如美国标准 SAE 5160 或等效高韧性合金钢）

• Manufacturing Process  

  • Precision hot rolling and forming 

  • Advanced quenching and tempering heat treatment for optimal fatigue life  

  • Shot peening to enhance surface tensile strength and stress resistance 

• Surface Finish  remium Black Corrosion-Resistant Paint (Anti-rust coating)  

4. Key Performance Features  

• Superior Load Distribution: The 7-leaf design effectively absorbs road shocks, reduces vibration, and provides a smooth, stable ride even under maximum 15,000 lbs axle loads.  

• High Fatigue Resistance: Manufactured from premium alloy steel, this spring offers exceptional durability and shape retention, preventing sagging over long-term heavy-duty towing. 

• Standardized Fitting: Precision-engineered 1" eyes and 3" width ensure direct compatibility with standard AxleTek heavy-duty trailer suspension hardware and hangers. / 

5. Quality Control & Testing  

• Dimensional Inspection: 100% verification of length, width, thickness, and arch height to ensure zero-defect assembly.  

• Load Deflection Testing: Rigorous testing under rated capacity (7,500 lbs) to verify spring rate and elasticity.  ， 

• Metallurgical & Hardness Testing: Hardness checked consistently across the leaf body to meet global railway and automotive safety standards.  

6. Packaging & Logistics  

• Bundle Packaging: Bundled securely with heavy-duty steel strapping bands or packed on reinforced steel/fumigation-free pallets.  

• Protective Coating: Interlocking areas are oiled, and the external surface is heavily coated to prevent rust during long-distance ocean transit.