Dongfeng VR truck parts Axle bracket 8406311-C1102 in stocked

Built to withstand the static and dynamic forces of drive axle operation (e.g., torque transfer, road impact), the bracket is crafted from Q355ND low-alloy high-strength steel—specifically designed for low-temperature and heavy-duty automotive applications. This material delivers a minimum yield strength of 355 MPa, tensile strength of 470–630 MPa, and impact toughness of ≥34 J at -40°C, enabling it to bear a maximum static load of 25kN without deformation (exceeding the VR’s axle design load by 20%). The steel undergoes normalized heat treatment (900–950°C heating, air cooling) to refine its microstructure, enhancing fatigue resistance—passing 2 million load cycles (equivalent to 800,000 km of road use) without crack formation. Compared to ordinary Q235 steel brackets, this Q355ND design extends service life by 55% under frequent heavy-load operations

Engineered to minimize stress concentration and improve load transfer, the bracket features a box-type closed structure at the axle mounting area—distributing vertical impact forces (from potholes or rough terrain) evenly across the chassis crossbeam. It integrates 6mm-thick reinforcing ribs (spaced 35mm apart) along the bracket’s length and width, increasing torsional stiffness by 40% and reducing twist during sudden acceleration or braking. The axle mounting face is machined to a surface roughness of Ra 1.6μm, ensuring tight contact with the axle flange and minimizing bolt stress (bolt torque retention rate ≥95% over 10,000 km). Unlike open-frame brackets that lack structural support, this optimized design maintains axle alignment even when the truck operates with full cargo loads, improving driving stability and reducing suspension maintenance costs

Designed to resist corrosion from road salt, mud, and moisture (common in undercarriage environments), the bracket undergoes a four-stage protective process. First, a chemical degreasing and derusting treatment removes surface contaminants. Next, a zinc phosphate conversion coating (60μm thickness) creates a porous base for coating adhesion. Then, an electrophoretic primer (80μm) forms a uniform moisture barrier, preventing rust from forming on steel surfaces. Finally, a high-gloss epoxy powder coating (70μm) is baked on (180–200°C curing) to resist chipping, chemical damage (e.g., diesel, road deicers), and UV degradation. This coating system passes 1,200 hours of neutral salt spray testing without rust or peeling, ensuring durability in snowy, coastal, or mining regions—where undercarriage corrosion is a major concern

Designed for efficient replacement by fleet technicians, the bracket simplifies installation with user-friendly details. All mounting holes are drilled to H8 tolerance (ensuring perfect alignment with the VR’s M22 axle bolts and M16 chassis bolts) and chamfered to avoid damaging bolt threads during assembly. The package includes 4 grade 10.9 high-tensile axle bolts (M22×60mm) and 4 grade 8.8 chassis bolts (M16×45mm), pre-lubricated with molybdenum disulfide to prevent thread galling in high-temperature environments. Installation takes 45–60 minutes: remove the old bracket by detaching the axle and chassis bolts, align the new bracket’s reference marks with the axle flange and chassis crossbeam, torque the axle bolts to 320 N·m and chassis bolts to 180 N·m (per OEM specifications), and verify axle rotation. Each unit undergoes dimensional inspection via CMM (Coordinate Measuring Machine), load-bearing testing, and coating adhesion checks, backed by a 24-month warranty against defects (e.g., cracking, coating peeling, dimensional inaccuracies)