71902 CE/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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71902 CE/HCP4ADBA Bearing Product Overview & Core Advantages
The 71902 CE/HCP4ADBA is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As part of a matched duplex pair in a back-to-back (DB) arrangement, this bearing is preloaded to provide exceptional rotational accuracy and system stiffness. Its construction, featuring a phenolic resin cage and ceramic balls, enables superior high-speed performance and reduced operational friction. This bearing is engineered to handle combined loads (radial and axial) simultaneously, making it an ideal solution for spindles requiring maximum precision and reliability.
71902 CE/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Advantage |
|---|---|---|
| 71902 | Basic bearing series and size designation (15mm bore, 28mm OD). | Compact design for space-constrained applications. |
| CE | Contact angle of 15°. | Optimized for handling combined radial and axial loads. |
| HC | Hybrid Ceramic (Silicon Nitride balls). | Reduced weight, lower friction, and higher speed capability. |
| P4A | Precision tolerance class (superior to ABEC 7). | Guarantees ultra-low runout and smooth, quiet operation. |
| DB | Duplex Back-to-Back arrangement. | Provides high moment rigidity and stable preload. |
| A | Extra Light Preload. | Minimizes heat generation at ultra-high speeds while maintaining stiffness. |
71902 CE/HCP4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) mounting creates a wide, rigid support system that effectively resists moment loads and tilting. This configuration, combined with the 15° contact angle, provides excellent capacity for combined loads.
Superior High-Speed Performance: The lightweight phenolic resin cage (Polyamide) and ceramic (Si3N4) balls significantly reduce centrifugal forces and inertial mass. This allows the bearing to achieve a very high limiting speed of 230,000 rpm (dn value) with minimal heat buildup.
Precision & Longevity: Manufactured to a P4A tolerance class, this bearing ensures minimal vibration and precise running accuracy. The open seal type is supplied with lubrication suitable for the specified temperature range, ready for integration into a controlled lubrication system.
71902 CE/HCP4ADBA Bearing Typical Application Areas
This super-precision angular contact ball bearing is specifically engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for CNC applications.
- Medical Equipment: High-speed dental handpieces and surgical tools.
- Aerospace & Defense: Gyroscopes and other critical navigation systems.
