Heavy-Duty 5-Blade 27" Dacromet-Treated Semi-Elliptical Leaf Spring (950kg Pair Capacity)

The Heavy-Duty 5-Blade 27" Dacromet-Treated Semi-Elliptical Leaf Spring is a high-performance commercial trailer suspension component engineered to provide reliable payload support, progressive shock damping, and superior corrosion defense for light-to-medium utility trailers, touring caravans, camping haulers, and marine boat trailers. Rated for a combined load capacity of 950 kg per pair (475 kg per individual spring assembly), this 5-blade spring stack utilizes an industry-standard 27-inch (~685 mm) eye-to-slipper mounting span, delivering balanced road compliance, lateral axle stability, and dependable cargo protection across highway routes and unpaved terrain.

To ensure long-term durability in corrosive operating environments, each individual leaf is treated with an advanced Dacromet (zinc-aluminum flake) anti-corrosion coating. Unlike basic painted or bare steel leaves that rapidly rust, flake, and seize under regular exposure to road moisture, coastal salt spray, or slipway launch submersion, Dacromet provides galvanic and barrier protection without the risk of hydrogen embrittlement. This specialized coating prevents rust bridging and inter-leaf binding, preserving smooth spring articulation, eliminating squeaks, and extending service intervals in demanding marine and agricultural environments.

Key Features & Benefits:

• Advanced Dacromet Anti-Corrosion Treatment: Specialized inorganic zinc and aluminum flake finish delivers superior resistance against coastal salt spray, marine launching submersion, road de-icing salts, and agricultural chemical washdowns.

• 950kg Combined Axle Capacity (Per Pair): Calibrated for light-to-medium trailer applications, supporting up to 475 kg per individual spring assembly across standard single- or tandem-axle chassis.

• 5-Blade Graduated Multi-Leaf Stack: Multi-layer construction progressively absorbs vertical road shock and vibrations, preventing sudden bottoming-out while dampening rebound bounce when towing empty or lightly loaded.

• Prevents Inter-Leaf Pack Seizure: Corrosion barrier prevents rust bridging and metal-to-metal bonding between blade contact surfaces, maintaining natural suspension compliance and quiet operation.

• Preserves Steel Elasticity (No Hydrogen Embrittlement): Non-electrolytic dip-and-bake application process eliminates the risk of hydrogen embrittlement, maintaining the full core tensile strength and fatigue life of the spring steel.

• Standard 27-Inch Span (~685 mm): Standard dimensions ensure drop-in compatibility with commercial slipper spring chassis hangers and standard axle mounting hardware kits.

• Lateral Stability & Roll Control: Multi-blade profile provides rigidity against lateral forces, reducing trailer body roll and sway during high-speed cornering or in strong crosswinds.

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

Ideal Applications:

• Boat & Marine Trailers: High-performance suspension for runabouts, ski boats, dinghies, and personal watercraft trailers frequently submerged in freshwater or corrosive coastal salt water.

• Luggage & Camping Trailers: Compliant running gear providing smooth road damping to protect camping gear, electronics, and supplies from harsh gravel road chatter.

• Light Commercial & Goods Trailers: Suspension for single-axle box trailers, general utility carts, and maintenance haulers operating in high-humidity or coastal regions.

• Touring Caravans: Running gear engineered to cushion interior fixtures and appliances against long-distance highway vibrations.

• Agricultural Implements & Farm Skids: Durable running gear for mobile fuel bowsers, farm runabouts, and field service trailers exposed to harsh weather and chemical washdowns.

Product Specifications:

• Product Name: 5 Blade Spring 27" Dacromet Treated

• Product Category: Suspension / Leaf Springs

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

• Number of Blades: 5 Blades

• Spring Length (Mounting Span): 27 Inches (~685 mm)

• Load Rating: 950 kg per Pair (475 kg per Individual Spring Assembly)

• 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, Utility & Agricultural Vehicles

• Condition: Brand New Heavy-Duty Commercial Vehicle Hardware