71906 CEGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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71906 CEGA/P4A Bearing Product Overview & Core Advantages
The 71906 CEGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class, this bearing delivers ultra-low runout and stable operation under demanding conditions. Its key advantage lies in its ability to handle combined loads—simultaneously supporting substantial radial loads and thrust loads in one direction—making it ideal for high-rigidity, high-speed spindles. The phenolic resin cage and optimized internal geometry contribute to its superior high-speed capabilities and smooth operation.
71906 CEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71906 | Basic bearing series and size designation (30mm bore, 47mm OD, 9mm width). |
| CE | Contact angle of 15° and internal design optimized for high-speed operation. |
| GA | Indicates a Universal Matchable (SU) bearing. Two bearings can be universally matched in a set to achieve specific preload and rigidity. |
| P4A | The tolerance class, denoting superior dimensional and running accuracy beyond ABEC 7/ISO P4 standards. |
71906 CEGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and Extra light preload (Class A) provide high axial and radial rigidity, enabling precise positioning and excellent performance under combined loads.
- Superior High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the optimized internal geometry and 15° contact angle allow for a very high limiting speed of 100,500 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on bore, outside diameter, and width for exceptional running accuracy in precision machinery.
- Universal Matching: As a Universal Matchable (SU) bearing, two units can be mounted in tandem to share loads and create a stiffer, more precise bearing system.
71906 CEGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for high-RPM electric motors.
- Robotics: High-precision joints and rotary actuators.
