71901 CE/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71901 CE/P4ADBB Bearing Product Overview & Core Advantages
The 71901 CE/P4ADBB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement provides superior stiffness and can accommodate combined loads (radial and axial loads). With its P4A tolerance class and light preload (Class B), it is engineered for high-speed operation and high-precision performance in compact spaces. The phenolic cage and optimized internal geometry contribute to its excellent high-speed capabilities and smooth operation.
71901 CE/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71901 | Bearing series and size designation |
| CE | Enhanced internal design for improved performance |
| P4A | High precision tolerance class for superior running accuracy |
| DBB | Duplex Back-to-Back arrangement for high rigidity and moment load capacity |
71901 CE/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back configuration creates a rigid bearing system that effectively resists moment loads and accommodates combined radial and axial loads. The 15° contact angle is optimized for axial load carrying capacity while maintaining good radial performance.
High-Speed Performance: The phenolic resin cage provides excellent strength-to-weight ratio, reducing centrifugal forces and enabling operation at limiting speeds up to 165,000 rpm. The precision-ground chrome steel balls and raceways ensure smooth rotation with minimal vibration.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore and OD tolerance: -0.004mm to 0), this bearing delivers exceptional running accuracy and positional stability essential for precision applications.
Thermal Stability: The phenolic cage material maintains dimensional stability across the operating temperature range of -30°C to 110°C, ensuring consistent performance under varying thermal conditions.
71901 CE/P4ADBB Bearing Typical Application Areas
The 71901 CE/P4ADBB is ideally suited for applications requiring high precision, high speed, and high rigidity, including:
- Machine tool spindles for precision machining centers
- High-speed machining heads and grinding spindles
- Precision instruments and measuring equipment
- Dental handpieces and medical equipment
- Small precision motors and servo drives
- Aerospace components requiring high-speed precision
