Heavy-Duty 7-Blade 27" Semi-Elliptical Leaf Spring (1,350kg Pair Capacity)

The Heavy-Duty 7-Blade 27" Semi-Elliptical Leaf Spring is a commercial-grade trailer suspension component engineered to provide robust payload support, progressive road damping, and consistent axle tracking for medium-duty commercial trailers, camping haulers, touring caravans, and general utility trailers. Rated for a combined load capacity of 1,350 kg per pair (675 kg per individual spring assembly), this 7-blade spring stack utilizes an industry-standard 27-inch (~685 mm) mounting span to deliver dependable stability, high roll resistance, and controlled ride dynamics across both paved highways and rugged unpaved terrain.

Constructed from oil-quenched and tempered high-tensile automotive spring steel, the 7-blade graduated architecture absorbs vertical road shocks and dynamic vibrations while preventing sudden bottoming-out under demanding payloads. Built in a classic eye-and-slipper layout, the rolled forward eye anchors securely into the front chassis bracket for positive trailing-arm axle geometry, while the rear slipper tail glides freely inside the slipper channel to allow unrestricted longitudinal travel under compression.

Key Features & Benefits:

• Calibrated 1,350kg Combined Capacity (Per Pair): Optimized for medium-duty single-axle utility trailers, braked cargo haulers, and touring caravans, supporting up to 675 kg per individual spring assembly.

• 7-Blade Graduated Multi-Leaf Stack: Multi-layer construction progressively absorbs vertical road impacts and vibrations, protecting chassis crossmembers, welds, and payload from stress fatigue.

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

• Controlled Articulation & Reduced Rebound: Eliminates harsh empty-trailer skating and excessive bouncing while maintaining firm, stable tracking under full payload.

• High-Tensile Quenched & Tempered Spring Steel: Heat-treated automotive spring steel provides fatigue resistance, structural elasticity, and long-term retention of arch camber under repeated cyclic loading.

• Standard Eye-to-Slipper Orientation: Front rolled and bushed eye anchors securely into the forward chassis hanger for accurate axle tracking, while the rear slipper tail expands freely inside the rear slipper guide.

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

Ideal Applications:

• Commercial & Utility Trailers: Suspension for single-axle box trailers, contractor carts, equipment haulers, and general commercial platforms.

• Touring Caravans & Camping Trailers: Running gear engineered to cushion interior joinery, camping equipment, and appliances from road vibration.

• Luggage & Cargo Haulers: Reliable suspension for enclosed luggage haulers, courier trailers, and municipal runabouts.

• Agricultural Implements & Farm Utility Carts: Running gear for field runabouts, mobile fuel bowsers, and farm service trailers operating over unpaved terrain.

Product Specifications:

• Product Name: 7 Blade Spring 27"

• 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): 27 Inches (~685 mm)

• Load Rating: 1,350 kg per Pair (675 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: Trailers, Caravans, Campers, Utility & Agricultural Vehicles

• Condition: Brand New Commercial Vehicle Hardware