Heavy-Duty 7-Blade 46" Semi-Elliptical Leaf Spring (9,000kg Pair Capacity / 75x15mm)

The Heavy-Duty 7-Blade 46" Semi-Elliptical Leaf Spring (75x15mm) is an extra-heavy-duty commercial vehicle suspension assembly engineered to deliver extreme payload support, lateral axle stability, and controlled shock damping for heavy transport haulers, plant trailers, industrial lowbeds, and heavy commercial chassis. Engineered with an ultra-wide 75 mm blade width by 15 mm individual blade thickness arranged across a heavy 7-blade stack, this suspension assembly is rated for a massive combined load capacity of 9,000 kg per pair (4,500 kg per individual spring assembly), designed specifically to carry high-tonnage industrial payloads across rough gravel tracks, unpaved work sites, and long-haul transport routes.

Featuring an extended 46-inch (~1,168 mm) mounting span, the spring configuration distributes severe vertical roadway shock and dynamic axle loads across a broader chassis span. The massive 75 mm footprint combined with the 15 mm blade gauge provides exceptional torsional and lateral stiffness, effectively suppressing dangerous chassis roll, axle twist, and trailer sway when hauling heavy earthmoving plant machinery, large industrial equipment, or bulk materials. Formed from high-tensile, oil-quenched and tempered automotive spring steel, it preserves its arch profile and elastic temper under punishing cyclic loading.

Key Features & Benefits:

• Extreme-Duty 9,000kg Combined Capacity (Per Pair): Engineered for severe commercial and industrial transport, supporting up to 4,500 kg per individual spring assembly on heavy axle sets.

• Massive 75x15mm Leaf Profile: Extra-wide 75 mm leaves with heavy-gauge 15 mm blade thickness resist extreme bending forces, blade splaying, and severe axle bottoming under peak gross vehicle weight.

• Extended 46-Inch Span (~1,168 mm): The lengthened arch profile delivers deeper, more progressive vertical deflection compared to shorter springs, smoothing out harsh roadway shock to protect chassis welds and heavy equipment.

• 7-Blade Graduated Multi-Leaf Stack: Thick 7-leaf progressive architecture absorbs heavy roadway impacts and cyclic shocks, shielding axle beams and chassis outriggers from structural stress fatigue.

• Superior Roll & Sway Resistance: The wide 75 mm leaf footprint maximizes lateral stability to minimize trailer body roll, dynamic swaying, 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 bracket for positive axle tracking, while the rear slipper tail glides freely to allow unrestricted longitudinal travel under compression.

Ideal Applications:

• Heavy Commercial & Lowbed Trailers: Suspension for high-capacity multi-axle lowbeds, plant equipment haulers, excavator carriers, and heavy machinery flatbeds.

• Mining & Heavy Industrial Equipment: Extreme-duty suspension for heavy site bowsers, mobile generator platforms, and equipment skids operating in harsh quarry and open-cast environments.

• Heavy Freight & Cargo Transport: High-capacity running gear for long-wheelbase commercial transport trailers and high-tonnage industrial haulers.

• Agricultural Implements & Bulk Wagons: Heavy running gear for high-capacity grain chaser bins, bulk fertilizer bowsers, and heavy farm transport trailers.

Product Specifications:

• Product Name: 7 Blade Spring 46" (75x15)

• Product Category: Suspension / Leaf Springs

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

• Number of Blades: 7 Blades

• Spring Length (Mounting Span): 46 Inches (~1,168 mm)

• Blade Dimensions: 75 mm Width x 15 mm Blade Thickness

• Load Rating: 9,000 kg per Pair (4,500 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, Plant Equipment, Heavy Caravans, Industrial & Agricultural Vehicles

• Condition: Brand New Heavy-Duty Commercial Vehicle Hardware