Dongfeng KR truck parts Shock absorber lower bracket 2901118-KR110

Built to bear the extreme impact and fatigue loads of truck suspension systems, this lower bracket is crafted from Q355B high-strength structural steel—offering a tensile strength of 510-660MPa, 30% higher than ordinary Q235 steel. The bracket undergoes a two-step heat treatment process (normalization + quenching), enhancing its surface hardness to HB200-230 and improving wear resistance. Finite element analysis (FEA) verifies its ability to withstand a maximum impact load of 80kN (equivalent to 8 tons) during emergency braking or rough road driving without deformation. The 15mm-thick steel plate at the stress concentration area (shock absorber mounting hole) further reinforces load-bearing capacity, ensuring the bracket avoids cracking even after 1 million fatigue cycles (ISO 12107 standard)

Engineered for precise integration with the Dongfeng KR’s suspension system, the bracket features CNC-machined key surfaces with a flatness tolerance of ≤0.1mm, ensuring tight fitting with the shock absorber and axle housing. The M16 threaded hole for shock absorber mounting undergoes tapping and rolling processing, achieving a thread precision grade of 6H and ensuring reliable connection with no thread stripping. The bracket’s integrated rib structure (3 ribs of 10mm thickness) distributes load evenly across the entire surface, reducing stress concentration by 45% compared to non-ribbed designs. This structural optimization ensures the shock absorber maintains stable damping performance, reducing vehicle body vibration by 25% and improving driver comfort during long-haul transportation

Designed for Dongfeng KR trucks operating in diverse regions—from coastal high-salt areas to dusty construction sites—the bracket exhibits exceptional corrosion resistance. It undergoes a three-layer anti-corrosion treatment: zinc phosphate pretreatment (for rust removal), electrophoretic coating (80μm thickness), and powder coating (60μm thickness). This multi-layer protection passes 1500-hour neutral salt spray testing (ASTM B117) with no red rust, far exceeding the 1000-hour requirement for commercial truck parts. The coating also resists impact and scratch (pencil hardness ≥2H), preventing corrosion from stone chips or road debris. This ensures the bracket’s service life of ≥200,000km, matching the truck’s overall durability

Optimized for efficient fleet maintenance, the shock absorber lower bracket features a user-friendly design. The 4 M12 bolt holes align perfectly with the axle housing’s original mounting points, using M12×30 grade 10.9 high-strength bolts that require a torque of 80-90N·m for secure fixation—no specialized tools needed. The bracket’s lightweight design (1.8kg) allows a single technician to handle installation, completing the entire replacement process (removing old bracket + installing new one) in 30 minutes. Clear laser-etched part numbers and installation direction marks prevent misinstallation, while the compatibility with original shock absorbers eliminates the need for additional adjustments. This streamlined design reduces fleet downtime and maintenance costs, ensuring quick return of vehicles to service