Single-leaf Spring (main Leaf)

 Single-Leaf Spring Product Introduction

These individual leaf springs serve as key replacement components for trailer leaf spring assemblies. Comprising both main and auxiliary leaves, they function as the primary load-bearing and shock-absorbing elements of the suspension system. They are ideal for repairing or replacing specific leaves that have fractured, deformed, or lost their elasticity due to wear, eliminating the need to replace the entire assembly and thereby significantly reducing maintenance costs while offering superior value.

Manufactured from high-purity spring steel, these leaves undergo high-temperature quenching, tempering, and shot-peening processes. This ensures excellent toughness and fatigue resistance, preventing breakage or sagging under heavy loads. A rust-resistant surface treatment provides durability against wear and corrosion, making them suitable for demanding conditions such as construction sites and long-haul transport, while ensuring a reliable service life.

The main leaves feature rolled eyes at both ends and act as the primary load-bearing members, supporting the bulk of the vehicle and cargo weight. The auxiliary leaves help distribute pressure and dampen shocks, thereby enhancing driving stability.

The product line offers comprehensive specifications-covering various lengths, hole spacings, widths, thicknesses, and arch heights-to suit suspension repairs and replacements for a wide range of semi-trailers and trucks. Designed for a precise fit and even load distribution, they effectively resolve issues such as vehicle pulling, uneven tire wear, and body leaning, making them a preferred choice for bulk stocking by auto repair shops and fleet operators.

Single-leaf and Multi-leaf Leaf Springs – Product Types

Single-leaf springs consist of a main leaf and an auxiliary leaf; they are available in specifications suitable for various vehicles-including trailers, tractor units, and light trucks-and are manufactured using either constant-section or variable-section processes. The main leaf features rolled eyes and bears the primary load, while the auxiliary leaf provides additional load-bearing support, meeting the need for individual leaf replacement and maintenance across different vehicle types.

Single-Leaf Spring | Specifications

Core dimensions (must be verified before purchase)

1. Plate width: 75mm, 90mm, 100mm (90mm/100mm are standard for trailers)

2. Plate thickness: 12mm, 13mm, 14mm, 16mm; greater thickness provides higher load-bearing capacity.

3. Center-to-center distance between spring eyes (hole spacing): 1120–1240 mm; this determines whether it can be installed directly onto the vehicle.

4. Free arch height (curvature): 65–130 mm; incorrect arch height can cause uneven vehicle ride height and abnormal tire wear.

5. Spring eye inner diameter: φ38–φ42 mm (matched to bushing dimensions)

6. Plate configuration: Constant cross-section (mainstream for heavy-duty applications) and variable cross-section (for lightweight vehicles).

Weight Reference

Weight per piece: 12–35 kg, varying with length, width, and thickness.

Key Features and Advantages of Single-Leaf Springs

1. Low maintenance costs and high cost-effectiveness.

If a single leaf is damaged, there is no need to replace the entire leaf spring assembly; replacing just the individual leaf restores functionality. This significantly reduces maintenance costs for fleets and repair shops, offering a practical, cost-effective solution with flexible inventory management.

2. Made of high-strength material, resistant to breakage and durable.

Manufactured from high-quality 60Si2Mn spring steel and treated with quenching, tempering, and shot-peening processes to eliminate internal stress, the product offers exceptional toughness and fatigue resistance; it is highly durable under heavy loads-resisting breakage and sagging-making it ideal for long-haul transport and the demanding road conditions of construction sites.

3. Even load distribution, stable driving

The individual leaves fit together precisely, eliminating friction-induced noise between them and ensuring balanced load-bearing and cushioning; this effectively mitigates issues such as body lean, uneven tire wear, and vehicle drifting, thereby enhancing driving stability.

4. Comprehensive specifications and broad compatibility

Covers the full range of main leaves (with wrapped eyes) and helper leaves (without wrapped eyes), offering various specifications for hole spacing, leaf width, thickness, and camber; compatible with the entire lineup of semi-trailers, tractor units, and trucks, ensuring a high degree of interchangeability.

5. Corrosion-resistant and wear-resistant; longer service life.

Features a high-temperature, rust-resistant spray finish that withstands corrosion, rain, and sun exposure; it resists rust and oxidation, ensures a low failure rate during long-term outdoor use, and offers durability far superior to generic, unbranded components.

6. Easy to install, time-saving, and efficient.

Precision-engineered with accurate dimensions, standardized mounting holes, and exact curvature; it allows for direct replacement of the original part without the need for modification or adjustment, ensuring a tight fit and high maintenance efficiency.

As one of China's leading manufacturers and suppliers of trailer leaf springs, we warmly invite you to purchase discounted, China-made trailer leaf springs here and obtain a price list from our factory. Please contact us for pricing inquiries.