Product structure:

This bearing is a standard miniature deep groove ball bearing with a single-sided flanged outer ring. Its main structural parameters are: 3 mm inner diameter, 7 mm outer diameter, and 3 mm width. The flange outer diameter is approximately 8.1 mm, providing axial positioning. It features double-sided metal shields (ZZ type) for sealing and is pre-lubricated with high-quality grease. The cage is typically made of stamped steel or engineering plastic, ensuring precise operation of the steel balls.

Key performance features:

1. Compact and High Precision: Miniature size design suitable for extremely limited installation spaces while maintaining high running accuracy.

2. Effective Sealing: Double-sided metal shields (ZZ) effectively block dust and contaminants, extending service life, making it suitable for dusty environments.

3. Convenient Positioning: The flanged outer ring simplifies axial installation and positioning within the housing, eliminating the need for additional locating components.

4. Low Torque and Smooth Operation: Optimized raceway design and high-quality lubrication ensure low starting and running torque, providing smooth and quiet operation.

5. Good Durability: Manufactured from high-carbon chromium bearing steel (e.g., GCr15) and heat-treated, offering good wear resistance and fatigue resistance.

Main application scenarios:

Primarily used for shaft support in various types of micro DC motors, such as drone motors and small cooling fan motors; precision transmission components, like laser printer drum drive shafts and scanner head guide rails; rotating parts in small instruments and meters, such as flow meter pointer mechanisms; movable joints in consumer electronics, like digital camera lens zoom mechanisms and micro gimbals; as well as wheel axles and drive parts in model cars and toys.

Technical Specifications and Requirements

       Technical Specifications:

• Dimensional Standards: Conforms to international miniature bearing tolerance standards such as ISO, JIS, or ABEC (typically ABEC-1 or ABEC-3 precision class).

• Radial Clearance: Typically employs MC3 group micro clearance to meet low vibration requirements of precision instruments.

• Lubrication: Pre-lubricated with high-performance synthetic grease at the factory, suitable for a temperature range of -30°C to +120°C.

• Materials: Rings and balls made of high-carbon chromium bearing steel, quenched and tempered to a hardness of HRC 58-64.

• Sealing: Double-sided stamped steel shields, providing contact sealing effective against dust but not fully waterproof.

• Load Ratings: Dynamic load rating approximately 180 N, static load rating approximately 70 N (reference values, may vary by manufacturer).

• Speed Limit: Can exceed 40,000 RPM under grease lubrication (depending on specific operating conditions).

       Technical Requirements:

1. During installation, ensure dimensional accuracy and concentricity of the shaft and housing bore to avoid improper installation stress.

2. The flange face should be firmly against the housing locating shoulder to achieve effective axial positioning.

3. Not recommended for severely corrosive environments or applications requiring complete waterproof sealing.

4. Suitable for precision motion applications with medium-to-low speeds and light loads; not suitable for heavy impact loads.

5. Store in a clean, dry environment to prevent corrosion.

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