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A21-3401330BB
HongPro
A21-3401330BB
This A21-3401330BB is a premium-grade ball joint, engineered to meet rigorous OEM specifications for a precise and secure fit in specific Chery vehicle suspensions. Crafted from high-strength, forged carbon steel and featuring a hardened steel ball stud, it guarantees exceptional durability and resistance to wear and tear.
The component is critical for maintaining optimal wheel alignment, ensuring stable handling, and providing responsive steering control. Its advanced design minimizes friction and accommodates multi-directional movement, effectively absorbing road shocks for a smoother ride.
Manufactured under a strict ISO 9001 certified quality management system, each unit undergoes rigorous performance testing. This ball joint boasts an estimated service life exceeding 100,000 kilometers under normal driving conditions, delivering reliable performance you can trust. Its robust dust boot effectively seals out contaminants, preserving the internal lubricant and extending the component's operational lifespan.
Engineered for longevity, this ball joint is forged from high-carbon steel and undergoes a specialized heat-treatment process. This significantly enhances its tensile strength and fatigue resistance, allowing it to withstand extreme stress and impact from road conditions. Rigorous laboratory testing, including over 500,000 cycles of fatigue and durability tests, validates an estimated service life exceeding 100,000 kilometers under normal driving conditions. This commitment to robust construction translates into a reliable component that reduces the frequency of replacements, offering long-term value and peace of mind.
Our ball joint is manufactured to exact OEM dimensions and torque specifications, guaranteeing a perfect fit and seamless integration with the vehicle's suspension system. The precision-machined ball stud and socket ensure minimal friction and play, providing responsive steering feedback, stable handling, and consistent wheel alignment. By maintaining optimal camber and caster angles, it ensures even tire wear and enhances overall driving safety. This precision is verified through coordinate measuring machine (CMM) inspections, ensuring every unit meets our strict tolerances.
A critical feature of this ball joint is its multi-lip, synthetic rubber dust boot. This boot is designed to be highly resistant to tearing, ozone, and temperature extremes from -40°C to 120°C. It creates a superior seal that effectively locks in high-temperature, water-resistant lithium soap-based grease and locks out dirt, water, and road salts. This advanced sealing system is the key to preventing premature failure, as tested in salt spray chambers for over 240 hours, ensuring the internal components remain protected and lubricated for the long haul.
Every batch of the A21-3401330BB is produced in an ISO 9001:2015 certified facility, adhering to a strict quality management system. Each individual unit undergoes a series of final inspections, including dynamic load testing and torque analysis, to guarantee performance that meets or exceeds original equipment standards. Our commitment to certified quality control processes ensures that you receive a part that is not only reliable but also traceable and consistent, batch after batch.
| Parameter | Specification | Notes / Standard |
| OEM Part Number | A21-3401330BB | Guarantees direct interchangeability. |
| Product Type | Front Lower Ball Joint | - |
| Thread Size | M12 x 1.25 | Standard fine pitch for secure fastening. |
| Torque Specification | 60-80 N·m | For the castle nut, ensuring proper clamp load. |
| Body Material | High-Strength Forged Carbon Steel | Grade 1045, for superior structural integrity. |
| Ball Stud Material | Case-Hardened Chromium Steel | Surface hardness: 55-60 HRC. Core toughness: 30-35 HRC. |
| Seal / Dust Boot | Synthetic Thermo-resistant Rubber | Operating temperature range: -40°C to +120°C. |
| Grease Type | Lithium Soap-Based EP Grease | High-temperature, water-resistant. (NLGI Grade 2) |
| Axial Load Capacity | ≥ 9.8 kN | (Test standard: SAE J490) |
| Radial Load Capacity | ≥ 14.7 kN | (Test standard: SAE J490) |
| Fatigue Life Test | > 500,000 cycles | No failure or measurable play developed. |
| Salt Spray Test | > 240 hours | (ASTM B117) - Red rust < 5% of surface area. |
| Quality Certification | ISO 9001:2015 | Manufactured under a certified Quality Management System. |
Here are specific application scenarios of Ball Joint:
This ball joint serves as a direct OEM replacement for vehicles experiencing common symptoms of suspension wear. Mechanics and installers use it to address specific issues like audible clicking or popping noises during sharp turns, excessive vibration in the steering wheel, or noticeable uneven tire wear. Replacing a worn ball joint with this premium unit restores the vehicle's original steering precision, eliminates safety hazards associated with a loose suspension, and prevents further damage to adjacent components like tires and control arms, ensuring optimal vehicle dynamics.
Following minor front-end collisions or impact with road hazards, the ball joint is often a critical component that requires inspection and replacement. This part is essential in professional repair shops to restore structural integrity and alignment geometry to the factory specification. Its precise OEM dimensions ensure that after a repair, the vehicle's camber and toe angles can be correctly realigned, guaranteeing stable handling, driver safety, and passing post-repair safety inspections without issues.
During scheduled vehicle maintenance or full suspension system refurbishments, this high-performance ball joint is the ideal choice. When replacing other wear items like shock absorbers or control arm bushings, upgrading to this durable ball joint ensures the entire front suspension system operates as a cohesive, like-new unit. Its certified load capacity and extended service life make it a reliable cornerstone for a comprehensive repair, providing customers with long-term peace of mind and significantly improved ride quality.
For vehicle owners in regions with poor road conditions—characterized by potholes, rough terrain, or heavy use of road de-icing salts—this ball joint is a smart preventive maintenance upgrade. Proactively replacing a aging component with this corrosion-resistant and high-strength model can prevent sudden failure. Its robust design and superior sealing technology offer enhanced protection against harsh environments, making it a trusted part for ensuring continued reliability and safety.
For optimal performance and safety, we recommend professional installation. Begin by safely supporting the vehicle and removing the old ball joint. Before installation, carefully inspect the new A21-3401330BB ball joint. Crucially, do not press on the dust boot when securing it into the knuckle, as this can cause damage.
Use a torque wrench to tighten the castle nut to the specified 60-80 N·m. Ensure the cotter pin is properly installed and secured. It is highly recommended to check and replace the cotter pin with a new one. Finally, a full front-end wheel alignment is essential after replacement to ensure proper handling and prevent premature tire wear.
