71902 CE/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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71902 CE/P4ADBB Bearing Product Overview & Core Advantages
The 71902 CE/P4ADBB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This metric bearing features a duplex back-to-back (DB) matched arrangement and comes with a light preload (Class B), making it ideal for spindle applications where high stiffness and precise running accuracy are critical. Its design is optimized to handle combined loads, efficiently managing both radial and axial forces.
71902 CE/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71902 | Basic bearing designation for a high-precision angular contact ball bearing series. |
| CE | Indicates a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| P4A | Denotes an ultra-high precision tolerance class, exceeding ABEC 7 standards, ensuring minimal runout and vibration. |
| DBB | Specifies a duplex back-to-back (DB) matched arrangement. Two bearings are precision-matched and mounted back-to-back to provide high rigidity and moment load capacity. |
71902 CE/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that significantly increases resistance to moment loads and shaft deflection, which is essential for maintaining precision in machine tool spindles.
Superior Precision: Manufactured to a P4A tolerance class, this bearing guarantees extremely tight dimensional and running accuracy, contributing to superior system performance and finish quality.
Optimized for High Speeds: The 15° contact angle and phenolic resin cage work in tandem to reduce friction and centrifugal forces, enabling a high limiting speed of 140,000 rpm. The open design allows for efficient lubrication management in high-speed systems.
High Load Capacity: The angular contact design is engineered to handle significant combined radial and axial loads simultaneously, making it a robust choice for demanding applications.
71902 CE/P4ADBB Bearing Typical Application Areas
- High-Speed Machine Tool Spindles (e.g., milling, grinding, and drilling spindles)
- Precision Grinding Machinery
- High-Frequency Motors and Spindles
- Medical and Dental Handpiece Drives
- Aerospace Instrumentation and Gyroscopes
