Multi-Leaf 3-Inch Trailer Suspension Leaf Spring

Product Description

This leaf spring is a heavy-duty suspension component made of multiple elastic steel plates of equal width but different lengths. It connects the vehicle frame and axle, supporting the load transmitted from the wheels while absorbing road shock and vibration. Positioned between the frame and axle, it helps maintain vehicle stability and improves adaptability to different road conditions.
The product features a durable black coating for rust resistance and a clean appearance, and is engineered for long fatigue life and reliable performance under heavy loads.

Product Highlights:

🔹 Heavy-Duty Multi-Leaf Design – Multiple stacked steel plates distribute weight evenly, delivering exceptional load-bearing capacity for heavy trucks and trailers.

🔹 High-Strength Spring Steel – Manufactured from premium-grade steel to withstand extreme stress, road shock, and heavy vibration.

🔹 Precision Forged Ends – The tapered/rolled ends ensure a secure and precise fit into the vehicle's suspension brackets.

🔹 Reinforced Retaining Clamps – Sturdy steel clamps keep the individual leaves tightly aligned, preventing lateral shifting and ensuring structural integrity.

🔹 Durable Anti-Rust Coating – Treated with a protective black finish to resist corrosion and extend service life in harsh road conditions.

🔹 Stamped Identification – Clearly marked with the model number (TRA3310) for easy identification and replacement.

Product Highlights:

🔹 Tapered Leaf Design – The individual steel plates taper toward the ends, reducing overall weight while maintaining excellent load support and flexibility.

🔹 High-Strength Spring Steel – Constructed from premium-grade steel to withstand heavy loads, road shock, and long-term fatigue.

🔹 Asymmetric Curvature – Engineered with a distinct curve to provide optimal suspension travel and smooth shock absorption for heavy-duty vehicles.

🔹 Heavy-Duty Retaining Clamps – Sturdy steel clips securely hold the leaves in alignment, preventing lateral movement under stress.

🔹 Durable Black Coating – Features a protective anti-rust finish to withstand harsh weather and road conditions.

🔹 Double-Eye/Flat End Mounting – Designed for secure and direct installation into standard suspension brackets.

Why Choose Our Leaf Springs?
 

1. Ultimate Rust Resistance & Flawless Finish
 

How we do it: We use electrophoretic (single leaf) and electrostatic (assembled) painting processes.

What you get: A salt spray resistance of over 500 hours (more than double the industry standard of 200 hours). You get a uniform, scratch-free coating that looks great and fights rust effectively.
 

2. Extended Lifespan with Shot Peening
 

How we do it: We apply pre-stressed shot peening under rated load conditions.

What you get: A fatigue life of over 160,000 cycles (exceeding the standard 150,000). This means your springs can handle heavier loads and deliver a much longer service life.
 

3. Precision Pre-Pressing & Computer-Controlled Camber
 

How we do it: Pre-pressing is done under rated load, and the camber is precisely selected and controlled by computer systems.

What you get: Guaranteed proper camber with minimal tolerance. We effectively screen out any products with unqualified camber, ensuring you only get the best.

Product Details


Packaging

FAQ

1. What materials do you use for the leaf springs?
We use top-grade materials like 60Si2Mn, SUP9, 50CrV, and 51CrV4, along with other grades tailored to your needs. Not sure which is best? Tell us your application and technical specs, and we'll recommend the perfect fit.

2. How do you guarantee the quality?
Quality is our priority. Our production strictly follows ISO9001 and TS/IATF16949 standards. From raw material selection to heat treatment, shot peening, painting, and final inspection, we control every step to ensure reliable performance.

3. How can I get the best price?
Pricing depends on the material, size, design, load capacity, and order quantity. The more details you share in your inquiry, the more accurate and competitive our quote will be. (And yes, larger quantities always get better pricing!)

4. Can we put our logo or brand on the products?
Absolutely. We offer logo printing, label printing, and stamping services. In most cases, standard printing is free. Just send us your logo design for confirmation before production starts.

5. How do you pack the products?
We provide customized packaging based on your requirements to ensure the leaf springs are fully protected during transit. Typically, they are bundled with strong steel straps and wrapped in waterproof materials for safe sea transport.

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