71900 CE/P4ADT
71900 Series Super Precision Angular Contact Ball Bearings
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71900 CE/P4ADT Bearing Product Overview & Core Advantages
The 71900 CE/P4ADT is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As part of a duplex tandem (DT) arrangement, this bearing is preloaded and supplied as a matched set, enabling it to handle significant axial loads in one direction while maintaining exceptional rotational accuracy. Its P4A tolerance class and phenolic resin cage make it an ideal solution for spindles and other precision machinery requiring uncompromising performance and reliability.
71900 CE/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71900 | Super-precision angular contact ball bearing series with a 10 mm bore diameter. |
| C | 15° contact angle, optimized for high-speed operation and axial load capacity. |
| E | Optimized internal design for enhanced performance and load rating. |
| P4A | High precision tolerance class exceeding ABEC 7, ensuring minimal runout and superior running accuracy. |
| DT | Duplex Tandem arrangement. Two bearings are matched and preloaded to share axial loads in the same direction, significantly increasing axial rigidity and load capacity. |
71900 CE/P4ADT Bearing Structural Features & Performance Benefits
High Rigidity & Axial Load Capacity: The duplex tandem (DT) arrangement creates a highly rigid system capable of supporting heavy axial loads. This preloaded matched set eliminates internal clearance, providing precise shaft positioning and exceptional stiffness.
Superior High-Speed Performance: The 15° contact angle and lightweight phenolic resin cage are engineered for high-speed operation, reducing centrifugal forces and friction. This allows the bearing to achieve a high limiting speed of 185,000 rpm.
Precision Engineering: Manufactured to P4A tolerance standards with tight dimensional control on the bore, outside diameter, and width. This guarantees smooth, quiet, and vibration-free operation, which is critical for precision applications.
Optimized Internal Geometry: The "E"-type design features an increased ball complement (11 balls) and larger ball diameter, resulting in a higher dynamic and static load rating for its compact size.
71900 CE/P4ADT Bearing Typical Application Areas
The 71900 CE/P4ADT is specifically engineered for high-performance machinery where speed, precision, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and drilling spindles.
- Precision Rotary Systems: Encoders, high-frequency motors, and gyroscopes.
- Medical & Dental Equipment: High-speed handpieces and surgical tools.
- Aerospace & Defense Systems: Guidance systems and radar equipment.
