71906 CE/HCPA9ADT
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71906 CE/HCPA9ADT Bearing Product Overview & Core Advantages
The 71906 CE/HCPA9ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional performance. This duplex tandem (DT) arrangement bearing set offers superior high rigidity and is preloaded for maximum stiffness and rotational accuracy. Manufactured to an ultra-precise PA9A tolerance class, it is engineered for high-speed operation, with a ceramic ball and phenolic cage combination that minimizes centrifugal forces and ensures stable performance at its impressive limiting speed. This bearing is pre-lubricated and ready for installation, making it an ideal solution for high-precision, high-reliability machinery.
71906 CE/HCPA9ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| 71906 | Standard bearing series and size designation (30mm bore, 47mm OD, 18mm width). | Defines the core bearing dimensions. |
| CE | Contact angle of 15°. | Optimized for handling combined loads (radial and axial). |
| HC | Hybrid Ceramic (Silicon Nitride balls). | Reduced weight, lower friction, and superior performance at high speeds. |
| PA9A | Ultra-high tolerance class (exceeding ABEC 9). | Ensures extreme running accuracy and minimal vibration for precision applications. |
| DT | Duplex Tandem arrangement. | Two bearings mounted in tandem to handle very high axial loads in one direction. |
71906 CE/HCPA9ADT Bearing Structural Features & Performance Benefits
- Duplex Tandem (DT) Arrangement & Preload: The two bearings are matched and preloaded, creating an exceptionally rigid assembly that minimizes axial and radial deflection under load, crucial for maintaining precision.
- Superior Load Capacity: The 15° contact angle and tandem configuration are specifically designed to handle very high unidirectional axial loads, as well as combined radial and axial loads.
- Exceptional High-Speed Performance: The combination of lightweight ceramic balls and a phenolic resin cage significantly reduces centrifugal forces and inertial drag, enabling stable operation up to the limiting speed of 100,500 rpm.
- Precision & Longevity: Manufactured to PA9A tolerance from high-grade chrome steel rings, this bearing guarantees exceptional running accuracy, low noise, and extended service life in precision applications.
71906 CE/HCPA9ADT Bearing Typical Application Areas
This high-precision, high-speed bearing set is ideally suited for the most demanding applications, including:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Motors and Drives
- Aerospace & Defense Systems
- Semiconductor Manufacturing Equipment
