71906 FE/HCPA9ADBA
Hybrid Ceramic Super Precision Bearings
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71906 FE/HCPA9ADBA Bearing Product Overview & Core Advantages
The 71906 FE/HCPA9ADBA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. As a duplex back-to-back (DB) matched set, this bearing is engineered to handle combined loads—simultaneously supporting significant radial loads and axial loads in both directions. Its construction with a ceramic ball and phenolic cage contributes to low friction, high rigidity, and superior performance at the specified limiting speed of 72,500 rpm. This bearing is preloaded to Extra light / Class A standards, ensuring smooth operation and precise rotational accuracy, making it ideal for high-reliability applications.
71906 FE/HCPA9ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71906 | Bearing series and size designation (30mm bore, 47mm OD, 18mm width) |
| FE | Designates a duplex bearing configuration |
| HC | Indicates hybrid ceramic balls for enhanced performance |
| PA9A | Specifies high precision tolerance class (PA9A) for exceptional running accuracy |
| DB | Denotes Back-to-Back arrangement for high moment rigidity |
| A | Specifies Extra light preload class |
71906 FE/HCPA9ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a rigid bearing system capable of withstanding combined radial and axial loads from both directions. The 18° contact angle is optimized for handling substantial axial loads while maintaining excellent radial load capacity.
High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a phenolic cage (lightweight with excellent sliding properties) enables the bearing to achieve exceptional limiting speeds up to 72,500 rpm with minimal heat generation.
Precision Engineering: Manufactured to PA9A tolerance class with tight dimensional controls on bore, outside diameter, and width, this bearing ensures precise shaft positioning and minimal runout, critical for high-accuracy applications.
Optimized Lubrication: The bearing comes pre-lubricated for immediate operation, suitable for the specified temperature range of -30°C to 110°C, providing reliable performance across various operating conditions.
71906 FE/HCPA9ADBA Bearing Typical Application Areas
The 71906 FE/HCPA9ADBA is ideally suited for demanding applications requiring high-speed operation and precision positioning, including:
- Machine Tool Spindles - High-speed milling and grinding spindles
- Precision Instrumentation - Measuring equipment and optical devices
- High-Speed Motors - Servo motors and spindle drives
- Aerospace Components - Gyroscopes and navigation systems
- Medical Equipment - Dental handpieces and surgical tools
