Heavy-Duty 12-Blade 40" Semi-Elliptical Leaf Spring (6,000kg Pair Capacity / 70x10mm)

The Heavy-Duty 12-Blade 40" Semi-Elliptical Leaf Spring (70x10mm) is an extra-heavy-duty industrial suspension assembly engineered to deliver high-capacity payload support, superior dynamic load dampening, and rugged structural stability for commercial transport trailers, agricultural implements, mining carriers, and plant machinery haulers. Utilizing a wide 70 mm blade width by 10 mm individual blade thickness arranged in a progressive 12-blade stack, this suspension assembly is rated for a massive combined load capacity of 6,000 kg per pair (3,000 kg per individual spring), built to withstand severe axle loads across unpaved access tracks, corrugated rural roads, and demanding industrial worksites.

Spanning an extended 40-inch (~1,016 mm) mounting length, the spring configuration distributes severe road shock and dynamic vertical forces across a broader section of the trailer chassis. The wide 70 mm profile and heavy 10 mm leaves provide exceptional lateral and torsional rigidity, effectively suppressing dangerous body roll, chassis twist, and trailer sway when hauling top-heavy machinery, liquid bowsers, or bulk agricultural produce. Manufactured from premium oil-quenched and tempered high-tensile spring steel, it preserves arch geometry and mechanical temper through high-mileage commercial duty cycles.

Key Features & Benefits:

• High-Capacity 6,000kg Combined Rating (Per Pair): Engineered specifically for heavy-duty commercial, industrial, and agricultural transport, providing reliable load-bearing capability of up to 3,000 kg per individual spring.

• Heavy-Gauge 70x10mm Leaf Profile: Features extra-wide 70 mm leaves with a 10 mm blade thickness, providing substantial resistance against lateral deformation, leaf splaying, and severe axle bottoming under peak payload.

• 12-Blade Progressive Multi-Leaf Stack: Multi-layered graduated design absorbs roadway shocks and cyclic impacts, protecting chassis welds, outriggers, and heavy axle beams from structural stress fractures.

• Extended 40-Inch Span (~1,016 mm): The lengthened arc provides smooth, progressive articulation and improved deflection, delivering controlled ride compliance under varying payload conditions.

• Superior Roll & Sway Resistance: The wide 70 mm leaf footprint delivers high torsional stability to minimize chassis lean, dynamic sway, and shifting in high-center-of-gravity loads.

• Quenched & Tempered Spring Alloy Steel: Built from automotive-grade heat-treated spring steel to combat fatigue failure, leaf sagging, and loss of arch height over long working lifetimes.

• Standard Eye-to-Slipper Orientation: Forward rolled and bushed spring eye anchors securely into the front chassis hanger bracket for positive axle tracking, while the rear slipper tail glides freely to allow unrestricted longitudinal travel under compression.

Ideal Applications:

• Heavy Commercial & Plant Trailers: Suspension for high-capacity tandem- and triple-axle plant trailers, bobcat transporters, mini-excavator carriers, and heavy equipment flatbeds.

• Agricultural Implements & Farm Wagons: Heavy running gear for bulk grain chaser bins, liquid fertilizer bowsers, feed wagons, and mobile field equipment.

• Mining & Heavy Industrial Equipment: Extreme-duty suspension for site diesel bowsers, lighting plants, heavy tool trailers, and mobile compressor skids operating in quarry and open-cast environments.

• Heavy Livestock & Horse Transporters: Multi-leaf running gear designed to handle dynamic animal movement and frequent chemical washdown cycles.

• Forestry & Logging Trailers: Heavy running gear engineered to endure demanding unpaved timber haul roads.

Product Specifications:

• Product Name: 12 Blade Spring 40" (70x10)

• Product Category: Suspension / Leaf Springs

• Spring Type: Heavy-Duty Semi-Elliptical Leaf Spring (Eye-and-Slipper Design)

• Number of Blades: 12 Blades

• Spring Length (Mounting Span): 40 Inches (~1,016 mm)

• Blade Dimensions: 70 mm Width x 10 mm Blade Thickness

• Load Rating: 6,000 kg per Pair (3,000 kg per Individual Spring Assembly)

• Installation Orientation: Front Spring Eye mounts towards the front of the trailer

• Material: Quenched & Tempered High-Tensile Automotive Spring Steel

• Application Compatibility: Commercial Trailers, Agricultural Machinery, Plant & Mining Equipment, Heavy Caravans

• Condition: Brand New Heavy-Duty Commercial Vehicle Hardware