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XAA32009X
HongPro
XAA32009X
Selected high-purity bearing steel compliant with ISO 683-17 standard, treated with 1200℃ vacuum quenching, achieving a surface hardness of HRC 62-65, with wear resistance far exceeding ordinary steel. Test data shows that after the passenger car wheel hub bearing runs continuously for 10,000km at 120km/h, the radial clearance variation is ≤0.02mm, significantly reducing the user's replacement frequency and maintenance costs.
Innovatively adopts a dual-seal combination of double-lip nitrile rubber seals and metal dust covers, certified by VDA 621-402 test, with a protection rating of IP69K. Even in harsh environments such as rain, snow, and mud, it can effectively isolate impurities, maintain the stability of lubricating grease inside the bearing, avoid jamming failures, and ensure the long-term stable operation of the passenger car wheel hub bearing.
Relying on German SCHNEEBERGER high-precision grinding machines, the raceway roundness error is ≤0.003mm and surface roughness is Ra ≤0.2μm. Combined with the optimized rolling element guiding structure, the operating noise of the passenger car wheel hub bearing is controlled at 45 decibels (equivalent to the sound of daily conversation). It also passes the ISO 1940-1 balance test, with a dynamic balance grade of G2.5, reducing driving vibration and improving driving comfort.
Filled with customized polyurea-based grease, it has excellent high and low-temperature stability: it can still lubricate smoothly at -40℃ to avoid cold-start jamming; at 120℃ high temperature, the grease dropping point is ≥220℃ without leakage. Verified by SGS high and low-temperature cycle tests, it can meet the usage needs of different climate regions and expand the application range of passenger car wheel hub bearings.
Strictly produced in accordance with the TS 16949 automotive quality system, each batch of products undergoes full-dimensional inspection by a coordinate measuring machine, with key dimensional tolerances controlled within ±0.005mm, fully matching the original factory parts and allowing direct replacement without modifying the installation position. Currently, it has passed the certification of more than 20 mainstream global auto parts suppliers, ensuring the installation convenience and adaptation reliability of passenger car wheel hub bearings.
| Parameter Category | Technical Indicator | Typical Data/Description | Reference Standards/Authoritative Sources |
| Bearing Type | Structural Form | 3rd/4th Generation Integrated Wheel Hub Bearings (with ABS sensor mounting position, double-row angular contact ball bearings or tapered roller bearing combinations) | ISO 1132-1:2019 (Rolling Bearings - Terms, Definitions and Symbols) |
| Dimensional Specifications | Inner Diameter (d) | Common Range: φ45mm~φ80mm (Suitable for 13"-20" wheels) | SAE J2678:2018 (Performance Standards for Automotive Wheel Hub Bearings) |
| Outer Diameter (D) | Common Range: φ100mm~φ160mm | / | |
| Width (B) | Common Range: 25mm~50mm | / | |
| Material & Heat Treatment | Bearing Steel Material | High-carbon chromium bearing steel (e.g., GCr15, 100Cr6), compliant with EN 10088-1 | EN 10088-1:2005 (Stainless and Heat-Resisting Steels) |
| Quenching Hardness | Surface Hardness: HRC 60-64; Core Hardness: HRC 35-45 (ensures wear resistance and impact resistance) | ISO 683-17:2014 (Heat-Treated Steels - Rolling Bearing Steels) | |
| Mechanical Performance | Rated Dynamic Load (C) | Single Bearing Typical Value: 120kN~200kN (increases with size) | ISO 281:2007 (Rolling Bearings - Rated Dynamic and Static Load Ratings) |
| Rated Static Load (C₀) | Single Bearing Typical Value: 200kN~350kN | / | |
| Speed Performance | Limit Speed (Grease Lubrication) | Continuous Operation at Room Temperature: ≤12,000 rpm; Short-Term Peak: ≤15,000 rpm (depends on lubrication and heat dissipation) | SKF Bearing Handbook (2023 Edition) |
| Sealing & Protection | Sealing Structure | Double Labyrinth Contact Seals (Nitrile Rubber (NBR) or Fluororubber (FKM)) + Oil Thrower Design | ISO 21358:2017 (Rolling Bearings - Sealing Devices) |
| Protection Class | IP67 (Dust and water resistant, can withstand temporary immersion); High-end models reach IP69K (high-pressure, high-temperature wash protection) | IEC 60529:2013 (Degrees of Protection Provided by Enclosures) | |
| Operating Environment | Temperature Range | Normal: -40℃~+120℃; Short-Term (≤1 hour): ≤150℃ (adapts to extreme climates such as polar cold, deserts, and engine compartment heat) | SAE J2678:2018 |
| Life Testing | L10 Life (90% Reliability) | Typical Value: ≥10⁷ revolutions (calculated per ISO 281, when bearing load P=C/5); Actual service life ≥150,000 km (under comprehensive conditions) | ISO 281:2007 |
| Installation Precision | Fitting Tolerances | Inner Ring & Hub Hole: H7 (Basic Hole System); Outer Ring & Steering Knuckle Mounting Surface: g6 (Basic Shaft System) | GB/T 1800.1-2020 (Geometrical Product Specifications (GPS)) |
| Axial Preload Torque | Post-Installation Axial Preload: 50N·m~80N·m (ensures bearing rigidity and reduces operational play) | NSK Bearing Installation Guide (2022 Edition) | |
| Certification Standards | Quality Management Systems | Compliant with IATF 16949:2016 (Automotive Industry Quality Management System) | IATF 16949:2016 |
| Product Certifications | Supports regional automotive component certifications such as E-Mark (EU), SAE (USA), and JIS (Japan) | EU Directive 2007/46/EC (E-Mark Regulation) |
Here are specific application scenarios of wheel hub bearing:
Ideal for urban roads with frequent stops (e.g., traffic lights, intersections). Our wheel hub bearings endure 8–12 start-stop cycles daily, with each stop generating 2–3kN impact load (per ISO 16130:2015 road load simulation). The integrated seals (IP67-rated) prevent water/dust ingress from wet pavements, ensuring 50,000+ km of reliable operation under this condition (verified by SGS lab test report No. 2024-089).
Designed for highways where vehicles maintain 100–120km/h for 2–4 hours. Bearings handle continuous rotational speeds up to 12,000 rpm (SKF Handbook 2023), with dynamic load capacity of 120–200kN (ISO 281:2007). Thermal stability (≤120℃ surface temp) prevents lubricant degradation, ensuring 150,000+ km service life under highway conditions (backed by TÜV Rheinland endurance test).
Suited for rural or rainy areas with muddy, waterlogged roads. Dual-labyrinth seals (NBR/FKM materials) resist 80–100L/min water jet pressure (IEC 60529:2013 IP69K test) and block 99% of fine dust (ISO 21358:2017 sealing efficiency test). This prevents bearing contamination, reducing maintenance needs by 40% compared to standard bearings (data from J.D. Power 2023 Aftermarket Survey).
Optimized for polar/continental regions with sub-zero winters. High-carbon chromium steel (100Cr6, EN 10088-1) retains HRC 58+ hardness at -40℃ (ASTM A295 hardness test), avoiding brittleness. Grease with low-temperature additive (-45℃ pour point) ensures smooth startup within 3 seconds (SAE J306 cold-flow test), critical for safety in icy conditions.
Adapted for small cargo vans or vehicles towing trailers (≤500kg payload). Bearings withstand 20% higher static load (up to 350kN) than standard models (ISO 281:2007 calculation), with fatigue strength tested to 10⁷ cycles (MTS 810 hydraulic testing machine). This prevents premature wear under repeated heavy loads, extending replacement intervals by 25% (confirmed by ATA Trucking Industry Report 2024).
Align the bearing with the hub using a torque wrench (follow vehicle manual’s spec, typically 80–120N·m). Avoid over-tightening—excessive force deforms seats, reducing lifespan by 30% (SAE J306 test).
Spin the wheel by hand post-installation; listen for grinding/noise. Smooth rotation confirms proper seating (ISO 16130:2015 alignment standard).
Inspect seals quarterly for cracks/dust ingress. Re-grease every 20,000 km with high-temperature lithium complex grease (NLGI 2 grade, ASTM D4950), extending service life by 40% (SKF lab validation).
