Ball Joint

APPLICATION SCENARIOS

1. Suspension system connections, serving as pivot points between steering knuckles and control arms  

2. Steering system ball joints, ensuring steering flexibility and precision  

3. Suspension stabilizer bar connections, absorbing road impacts and vibrations  

4. Various movable connection points in the chassis system, enabling multi-directional movement and adjustment

Product Description

This series of automotive ball joint assemblies consist of metal ball joint components and high-performance dust-proof rubber boots, serving as key connecting parts in automotive suspension and steering systems. The product enables multi-angle flexible rotation, bears vehicle weight and dynamic impact loads, and ensures precise wheel steering and driving stability. The dust-proof rubber boots feature excellent sealing and protective capabilities, preventing foreign objects from entering the interior of the ball joint and causing wear or grease leakage. With a compact structure and reliable sealing, it is compatible with chassis systems of various passenger cars and commercial vehicles. Customization services are available.

PRODUCT FUNCTION

Dual functions of bearing rotation and load: The ball joint connects the control arm and steering knuckle, enabling multi-directional free rotation of suspension components and ensuring the wheels flexibly respond to steering actions;  

Maintaining wheel alignment angles: Ensures the stability of geometric parameters such as toe angle and camber angle, improving handling and tire lifespan;  

Rubber boot sealing protection: Dust-proof, mud-proof, and water-proof, blocking foreign matter intrusion and sealing in grease to extend the service life of the ball joint assembly;  

Shock absorption and strong corrosion resistance: Prevents ball pin wear, loosening, and premature failure caused by lack of lubrication.

PERFORMANCE INDEX

Ball joint assembly:  

Dynamic load-bearing capacity: >25kN (lower ball joint)  

Rotation life test: ≥500,000 cycles without abnormality  

Ball pin hardness: HRC 55–65; anti-rust surface treatment, passing ≥96h salt spray test  

Dust-proof rubber boot:  

Main material: High-strength synthetic rubber (e.g., CR/NBR/EPDM)  

Tensile strength: ≥12MPa; elongation at break ≥400%  

Anti-aging performance: Ozone resistance ≥72 hours without cracks; UV irradiation retention rate ≥80%  

Oil resistance: Performance change rate ≤20% after 168-hour immersion  

Sealing performance: Grease leakage rate ＜1%

APPLICATION AREA

Automotive ball joints and dust-proof rubber boots are widely used in:  

Suspension systems (e.g., control arm connections, lower ball joint load-bearing);  

Steering systems (e.g., connections between steering knuckles and tie rods);  

Chassis dynamic support systems, used to enhance vehicle body stability and handling response;  

Compatible with multiple vehicle models such as new energy vehicles, commercial vehicles, and SUVs, suitable for reliable operation under working conditions including urban roads, highways, and unpaved road conditions.