Extreme-Duty 13-Blade 40" Spring Mounting Kit Combo (8,000kg Pair Capacity / 80mm Square Axle)

The Extreme-Duty 13-Blade 40" Spring Mounting Kit Combo (SKIT8000) is an integrated industrial trailer suspension solution engineered to provide heavy payload support, lateral axle stability, and structural chassis integration for heavy plant equipment trailers, commercial lowbeds, bulk agricultural trailers, and mining carriers. Rated for a combined load capacity of 8,000 kg per pair (4,000 kg per individual spring assembly), this complete suspension package is engineered specifically to interface with heavy 80 mm square solid or hollow-beam axles.

The assembly centers around an extra-heavy-duty 13-blade multi-leaf spring (S13/40) spanning 1,100 mm (~40 inches), constructed from wide 70 mm by 10 mm individual heat-treated spring steel blades. Supplied as a matched kit per corner/side, it includes the matching forward hanger bracket (SH70H-10) and rear slipper hanger assembly (SH70S-10LS). This integrated setup ensures that bracket clearances, pin alignment, and slipper guide tolerances perfectly match the 70 mm wide leaf pack, eliminating mismatched components and streamlining chassis fabrication.

Key Features & Benefits:

• Extreme-Duty 8,000kg Combined Capacity (Per Pair): Delivers robust load-bearing capability of up to 4,000 kg per assembly side, making it suitable for high-tonnage plant trailers, earthmoving machinery haulers, and commercial agricultural wagons.

• Matched 80mm Square Axle Fitment: Engineered specifically to seat and anchor heavy 80 mm square axle beams, ensuring secure U-bolt clamping, accurate axle location, and resistance against brake torque rotation.

• 13-Blade Progressive Multi-Leaf Stack: Thick 13-leaf graduated architecture absorbs severe vertical roadway impacts, cyclic shock loads, and high dynamic stress, protecting chassis crossmembers and axle beams from premature fatigue.

• Heavy-Gauge 70x10mm Leaf Profile: Wide 70 mm leaves with 10 mm blade thickness provide substantial torsional and lateral stiffness, effectively suppressing body roll and trailer sway when carrying high-center-of-gravity loads.

• Complete Corner Kit Integration: Comes bundled with the dedicated forward eye hanger bracket (SH70H-10) and the matching rear slipper hanger assembly (SH70S-10LS), ensuring proper installation fit and wear characteristics.

• High-Tensile Quenched & Tempered Spring Steel: Heat-treated automotive spring steel maintains arch profile and elasticity through demanding commercial service cycles.

• Standard Eye-to-Slipper Articulation: Forward rolled and bushed spring eye anchors positively into the front hanger bracket for accurate axle tracking, while the rear slipper tail slides freely inside the heavy-duty rear slipper guide under compression.

Kit Contents (Per Spring Assembly):

• 1x S13/40: 13-Blade 40" (1,100 mm) Semi-Elliptical Leaf Spring (70 mm x 10 mm)

• 1x SH70H-10: Heavy-Duty 70 mm Front Spring Hanger Bracket

• 1x SH70S-10LS: Heavy-Duty 70 mm Rear Slipper Hanger Assembly

Ideal Applications:

• Heavy Plant & Machinery Transporters: Running gear for lowbed trailers, mini-excavator carriers, skid-steer trailers, and plant equipment flatbeds.

• Agricultural Implements & Bulk Trailers: Heavy suspension for grain chaser bins, liquid slurry bowsers, silage trailers, and bulk harvest transport.

• Mining & Industrial Service Trailers: Extreme-duty suspension for quarry diesel bowsers, mobile lighting towers, industrial generator skids, and heavy tool units.

• Heavy Commercial Freight Trailers: Suspension running gear for multi-axle freight haulers and flatbed utility platforms operating on corrugated gravel and unpaved roads.

Product Specifications:

• Product Name: Spring Kit 8,000kg

• Product SKU: SKIT8000

• Product Category: Suspension / Leaf Spring Kits

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

• Number of Blades: 13 Blades

• Spring Length (Overall Span): 1,100 mm (~40 Inches)

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

• Load Rating: 8,000 kg per Pair (4,000 kg per Individual Spring Kit)

• Supported Axle Size: 80 mm Square Axle Beam

• Included Hardware: Front Hanger Bracket, Rear Slipper Assembly

• Material: Quenched & Tempered High-Tensile Automotive Spring Steel / Weldable Structural Steel Brackets

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

• Condition: Brand New Heavy-Duty Commercial Vehicle Hardware