6810Z 6809Z 6807Z 6805Z Thin Wall Deep Groove Ball Bearing

Models such as 6301Z, 6303Z, 6305Z, 6307Z, and 6309Z are part of the single-row deep-groove ball bearing series and are widely used in automotive and industrial drive systems. This series strikes a strong balance among structural design, load capacity, operational stability, and protective performance, making it suitable for medium-to-high speeds, medium-to-heavy loads, and dusty operating conditions.

I. Product Highlights

Pre-lubricated, Ready for Installation

Bearings are pre-filled with high-quality grease at the factory, eliminating the need for additional lubrication or cleaning prior to installation. This simplifies assembly and ensures stable lubrication from startup.

Smooth and Flat Surface, Stable Operation

The rings and rolling elements are precision-machined to achieve a smooth surface and high dimensional accuracy, thereby reducing friction and maintaining stable operation even at high rotational speeds.

Compact Structure, High Load Capacity

The single-row deep groove design provides high radial load capacity within a limited space, while also accommodating bidirectional axial loads, making it suitable for applications with space constraints and high load requirements.

Dust-Proof Performance, Extended Service Life

The "Z" and "ZZ" metal shields effectively prevent large dust particles and contaminants from entering the bearing, reducing wear and ensuring long-term reliability in dusty or open environments.

High-Temperature Quenching and Forging, Robust and Durable

The rings and rolling elements are manufactured from high-quality bearing steel, processed through high-temperature quenching and tempering. This results in a uniform microstructure, high hardness, and strong fatigue resistance, suitable for continuous operation under demanding conditions.

II. Structural and Performance Characteristics

Single-Row Design, Suitable for High-Speed Operation

The single-row configuration, combined with deep groove raceways, minimizes friction and heat generation, making these bearings ideal for high-speed applications such as electric motors and tensioner pulleys.

Low Friction, Low Noise, Low Vibration

Through optimized internal geometry and precision manufacturing, these bearings operate with low noise and vibration, improving overall system smoothness and comfort.

Combined Radial and Axial Load Capacity

At high rotational speeds, these bearings can support radial loads and accommodate a limited axial load in both directions, simplifying system design by eliminating the need for separate thrust bearings.

III. Specifications and Configurations

Bore Size Range: 10 – 600 mm, covering a wide variety of applications from miniature components to large drive systems.

Precision Ratings: Available in P0, P6, P5, P4, and P2 precision classes to meet varying operational accuracy requirements.

Seal Types:

• ZZ: Double metal shields, suitable for general dusty environments
• 2RS: Double rubber seals, suitable for applications requiring protection against moisture or contaminants
• OPEN: No shields or seals, suitable for oil lubrication or high-speed applications requiring efficient heat dissipation
• Material: High-quality bearing steel, heat-treated for enhanced wear resistance and contact fatigue strength.

IV. Main Industrial Applications

This bearing series is widely used in wheel-related equipment and drive components, including:

• Wheels and drivetrain systems in automobiles, motorcycles, and trucks
• Specialty vehicles such as karts, tractors, and snow blowers
• Light-load mobility equipment, including bicycles, skateboards, and roller skates
• Outdoor power equipment such as lawn mowers and snow throwers
• Precision machinery, including 3D printers and small industrial drives

V. Usage Guidelines

Even Press-Fit Installation, Prevent Tilting

During installation, use appropriate tooling to apply uniform pressure to the bearing ring. Avoid transmitting installation force through the rolling elements, as this can cause tilting or skewing, which negatively affects operational accuracy and service life.

Proper Fit Selection

Select appropriate shaft and housing fit tolerances based on operating conditions. An overly loose fit may lead to fretting wear, while an excessively tight fit can reduce internal clearance and cause premature failure.

Match Operating Conditions

For high-speed, heavy-load, or applications with significant temperature variations, it is recommended to select an appropriate internal clearance (such as C3) to ensure proper bearing performance under thermal expansion.

Suitable for Combined Radial and Axial Loads

This bearing series is designed to accommodate both radial and axial loads, making it well suited for applications with bidirectional loading at high speeds.