719/8 CE/P4ADBB
Miniature Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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719/8 CE/P4ADBB Bearing Product Overview & Core Advantages
The 719/8 CE/P4ADBB is a high-precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched back-to-back arrangement is preloaded to Light / Class B specifications, providing superior stability and resistance to combined radial and axial loads. Manufactured to ABEC 7 / P4A tolerance class, it delivers outstanding running accuracy, making it ideal for high-speed spindles and other precision machinery where minimal runout and high system rigidity are critical.
719/8 CE/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 719/8 | Precision series with 8 mm bore diameter. |
| CE | High-precision bearing with a 15° contact angle. |
| P4A | Indicates ABEC 7 / ISO P4A tolerance class for superior dimensional and running accuracy. |
| DBB | Specifies a Duplex Back-to-Back (DB) matched arrangement of two bearings, providing high moment stiffness. |
719/8 CE/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) configuration creates a wide effective spread, significantly increasing the bearing's ability to withstand combined loads (radial and axial) and moments, resulting in exceptional system rigidity.
High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces and ensures stable operation at the high limiting speed of 220,000 rpm. The optimized internal geometry further enhances high-speed capability.
Precision & Accuracy: Manufactured to P4A tolerance class with a consistent 15° contact angle, this bearing guarantees minimal runout and precise shaft positioning, which is critical for high-precision applications.
Material & Lubrication: Constructed from chrome steel for rings and balls, offering high durability and fatigue resistance. The bearing is pre-lubricated for immediate operation within a temperature range of -30°C to 110°C.
719/8 CE/P4ADBB Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision and speed are paramount. Key industries and equipment include:
- High-Frequency Spindles for PCB drilling and precision machining
- Precision Grinding Spindles
- High-Speed Machine Tool Axles
- Medical & Dental Handpiece Drives
- Advanced Robotics and Automation components
