Heavy-Duty 10-Blade 36" Dacromet-Treated Semi-Elliptical Leaf Spring

The Heavy-Duty 10-Blade 36" Dacromet-Treated Semi-Elliptical Leaf Spring is an extended-span, high-capacity commercial suspension component engineered to deliver superior shock absorption, dynamic axle stability, and advanced corrosion protection for commercial transport trailers, heavy utility haulers, touring caravans, horseboxes, and marine boat trailers. Utilizing a multi-layer 10-blade graduated stack across an elongated 36-inch (~914 mm) eye-to-slipper mounting span, this spring provides the ideal combination of heavy load-carrying support and extended deflection, ensuring a smoother, less jarring ride over long highway distances and corrugated gravel routes.

To withstand corrosive road environments, each individual leaf is treated with an advanced Dacromet (zinc-aluminum flake) anti-corrosion coating. Unlike standard painted or bare spring steel that quickly oxidizes and binds when exposed to water, mud, and road grime, Dacromet treatment provides four-way galvanic and barrier protection without risking hydrogen embrittlement. This surface treatment prevents rust bridging and inter-leaf seizure, preserving smooth suspension articulation and extending operational service life under demanding coastal, agricultural, and industrial transport conditions.

Key Features & Benefits:

• Extended 36-Inch Span (~914 mm): Longer arch length provides greater vertical deflection and travel compared to shorter springs, smoothing out roadway shock and vibration to protect cargo and chassis welds.

• Heavy-Duty 10-Blade Graduated Stack: Multi-leaf design distributes heavy vertical payloads progressively across ten high-tensile spring steel leaves, preventing sudden bottoming-out under full load.

• Advanced Dacromet Anti-Corrosion Treatment: Specialized inorganic zinc/aluminum flake finish provides exceptional resistance against salt spray, standing road moisture, industrial washdowns, and agricultural chemicals.

• Friction & Seizure Prevention: Prevents rust bonding between leaf contact faces, ensuring smooth blade glide, consistent damping, and quiet operation over extended service intervals.

• No Hydrogen Embrittlement: Applied without high-stress acid pickling or electroplating, maintaining the core tensile strength, elasticity, and fatigue life of the spring steel.

• High Roll & Sway Stability: Multi-layer construction provides strong lateral rigidity, effectively controlling trailer sway, chassis lean, and shifting in top-heavy loads during cornering.

• Standard Eye-to-Slipper Orientation: Forward rolled eye anchors securely to the front chassis hanger bracket for positive axle tracking, while the rear slipper end moves freely inside the slipper channel to allow longitudinal expansion under compression.

Ideal Applications:

• Boat & Marine Trailers: High-capacity marine trailers where exposure to salt water and slipway launching causes premature corrosion and binding in untreated leaf packs.

• Touring Caravans & Camper Trailers: Extended-length suspension delivering compliant ride quality that cushions onboard appliances, cabinetry, and delicate interior fittings from road shock.

• Heavy Commercial & Utility Trailers: Suspension for single- and tandem-axle goods trailers, flatbeds, and equipment haulers operating in high-humidity or coastal regions.

• Horseboxes & Livestock Transporters: Smooth, progressive damping engineered to reduce animal stress and road fatigue over unpaved rural tracks.

• Agricultural Implements & Farm Wagons: Long-span running gear for fertilizer bowsers, farm wagons, and mobile utility platforms exposed to corrosive washdowns and weather.

Product Specifications:

• Product Name: 10 Blade Spring 36" Dacromet Treated

• Product Category: Suspension / Leaf Springs

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

• Number of Blades: 10 Blades

• Spring Length (Mounting Span): 36 Inches (~914 mm)

• Surface Coating: Dacromet (High-Performance Zinc/Aluminum Flake Anti-Corrosion Treatment)

• Corrosion Resistance: Marine & Salt-Spray Rated (Rust & Chemical Resistant)

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

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

• Application Compatibility: Commercial Trailers, Caravans, Boat Trailers, Horseboxes, Utility & Agricultural Vehicles

• Condition: Brand New Heavy-Duty Commercial Vehicle Hardware