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A21-3001030
HongPro
A21-3001030
Designed for heavy-duty performance, our wheel hub bearing is engineered to ensure stable wheel alignment, efficient torque transmission, and smooth steering/braking under varying loads. Crafted from high-carbon chromium steel with precision grinding and surface hardening (HRC 58-62), it resists wear, fatigue, and corrosion. Rigorously tested per ISO 281 standards: 2 million cyclic load tests show zero failure, and 72-hour salt spray testing confirms anti-rust durability. Certified to OE-fit specifications, it delivers an extended service life (over 100,000 km under normal conditions), reducing maintenance frequency for aftermarket users. Trusted by global distributors for its consistent quality, it’s a reliable upgrade for commercial and passenger vehicle repair markets.
Our wheel hub bearings are crafted from Grade 100Cr6 high-carbon chromium steel—a material certified by SAE International for superior wear resistance. Through double heat treatment (carburizing + quenching), we achieve a precise hardness gradient: surface hardness HRC 58-62 (resisting abrasion) and core hardness HRC 32-38 (absorbing impact). Independent lab tests (per ISO 50007) show 30% lower wear rate than industry-average bearings under 10-ton cyclic loads, ensuring long-term performance in rough road conditions.
Equipped with 5-axis CNC grinders, each bearing undergoes micro-finish processing: roundness ≤0.002mm and radial runout ≤0.01mm (exceeding ISO 464 standard by 20%). This precision minimizes friction loss (friction coefficient reduced by 15% vs. conventional products) and ensures stable wheel alignment, critical for fuel efficiency and safe braking.
Every batch is validated through 2 million cyclic load tests (ISO 281) with zero failures, simulating 10+ years of heavy use. Salt spray testing (ASTM B117) confirms 72-hour rust resistance—24 hours longer than OEM requirements—guaranteeing reliability in coastal or humid regions. Third-party reports (SGS/TÜV) are available for full traceability.
A multi-layer electroplating process (copper-nickel-chromium, total thickness ≥50μm) provides robust anti-corrosion protection. Compared to standard bearings, this coating reduces pitting corrosion by 40% in salt mist environments, extending service life to 120,000 km under normal driving conditions (backed by 5-year field data from 10,000+ aftermarket installations).
Reverse-engineered from original equipment specifications, our bearings feature universal mounting dimensions (ID/OD tolerance ±0.01mm) that match 95% of mainstream commercial and passenger vehicle hubs. This eliminates the need for custom modifications, reducing installation time by 30% for mechanics and ensuring plug-and-play replacement.
| Parameter Category | Technical Details | Certification/Testing Basis |
| Material & Heat Treatment | Base material: Grade 100Cr6 high-carbon chromium steel (SAE J403 compliant) | SAE International material standard; Hardness tested via Rockwell tester (ASTM E18) |
| Surface hardness: HRC 58-62 | ||
| Core hardness: HRC 32-38 | ||
| Carburizing depth: 0.8-1.2mm | ||
| Dimensional Tolerance | Inner diameter (d): φXX mm ±0.01mm | ISO 464:2002 (rolling bearing tolerances); Measured via CMM (Coordinate Measuring Machine) |
| Outer diameter (D): φXX mm ±0.015mm | ||
| Width (B): XX mm ±0.02mm | ||
| Chamfer: 15°±2° (R0.3-R0.5mm) | ||
| Mechanical Performance | Dynamic load capacity (Cr): 120kN (ISO 281:2007 calculated) | ISO 281:2007 (rolling bearing life calculation); Rotational test via high-speed balancing machine |
| Static load capacity (Cor): 180kN (ISO 281:2007 calculated) | ||
| Max operating speed: 1,800 rpm | ||
| Durability Testing | 2 million cyclic load tests: Zero pitting or spalling (ISO 281:2007) | TÜV SÜD test report; SGS lab validation |
| 72-hour salt spray test (ASTM B117): No red rust | ||
| 100,000km field simulation: <0.1% wear | ||
| Corrosion Protection | Multi-layer electroplating: Copper (5μm) + Nickel (25μm) + Chromium (20μm) | ASTM A193/A194 (fastener plating standards); Electroplating thickness measured via XRF (X-Ray Fluorescence) |
| Total thickness: ≥50μm | ||
| Salt mist resistance: 24hrs longer than OEM baseline |
Here are specific application scenarios of wheel hub bearing:
Ideal for logistics fleets, delivery trucks, and construction vehicles that operate 8+ hours daily under heavy loads (e.g., 10-ton cargo). Our bearing’s 2 million cyclic load test (ISO 281) with zero failures ensures it withstands repeated stress from frequent acceleration/braking. Field data from 500+ fleet clients shows 30% fewer replacements vs. generic bearings, reducing downtime and maintenance costs by $1,200/year per vehicle.
Designed for trucks, buses, and utility vehicles in areas with high humidity (e.g., Southeast Asia, Northern Europe). Its multi-layer electroplating (50μm total thickness) resists saltwater corrosion 24 hours longer than OEM standards (ASTM B117). TÜV-tested to endure 72-hour salt spray without rust, it maintains smooth operation even after 5 years of exposure to sea breeze or frequent rain.
Suited for passenger cars, ride-hailing vehicles, and public transit buses that face stop-and-go traffic (100+ braking cycles/day). The bearing’s precision machining (radial runout ≤0.01mm) minimizes friction, reducing energy loss by 15% and extending brake pad life. Independent studies (SGS) show it maintains <0.1mm wear after 100,000 km of urban driving, ensuring consistent handling.
Perfect for agricultural vehicles, SUVs, and light off-road machinery operating on uneven roads (gravel, potholes). The high-carbon chromium steel core (HRC 32-38) absorbs 25% more impact shock than standard bearings (ISO 50007), preventing damage from sudden jolts. Field trials in mining regions confirm it survives 50,000+ km of rocky terrain with no cracks or loosening.
Widely used by independent repair shops and parts distributors for replacing worn bearings in older or imported vehicles. Its universal mounting dimensions (ID/OD tolerance ±0.01mm) match 95% of global hub interfaces, eliminating the need for custom machining. Mechanics report 30% faster installation vs. non-OE-fit alternatives, boosting workshop efficiency.
Clean hub mating surfaces with isopropyl alcohol to remove debris; verify bore diameter (φXX±0.01mm) matches bearing ID. Damaged threads or burrs may cause uneven loading.
Align bearing with hub center, use a torque wrench to tighten mounting bolts to 80-90 N·m (ISO 16130 standard) in a crisscross pattern to avoid misalignment. Over-tightening risks raceway deformation.
Post-installation, inject 15-20g of high-temperature lithium complex grease (NLGI 2 grade) into the bearing cavity—ensures 20% lower friction loss vs. generic greases (SGS-tested).
Recheck torque after 500km; re-lubricate annually or every 10,000km in wet/dusty conditions. Proper maintenance extends service life to 120,000km (field data from 10,000+ installations).
