71909 CE/HCDGAVQ126
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71909 CE/HCDGAVQ126 Bearing Product Overview & Core Advantages
The 71909 CE/HCDGAVQ126 is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This metric series bearing features a 15° contact angle and is supplied as a Universal Matchable (SU) set of two bearings, enabling optimized preload configuration for maximum system rigidity. Its ceramic ball construction and P4A super-precision tolerance make it ideal for applications requiring high-speed operation, superior running accuracy, and extended service life.
71909 CE/HCDGAVQ126 Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Advantage |
|---|---|---|
| CE | Ceramic Balls | Reduced centrifugal forces, lower friction, and enhanced high-speed capability |
| HC | High Capacity Design | Optimized internal geometry for increased load carrying capacity |
| DG | Universal Matchable (SU) | Pairs can be arranged in various configurations to achieve specific preload and stiffness requirements |
| A | 30° Contact Angle | Balanced capacity for combined radial and axial loads |
| VQ126 | Special Lubrication | Pre-lubricated for immediate operation within specified temperature range |
71909 CE/HCDGAVQ126 Bearing Structural Features & Performance Benefits
High-Speed Performance: The combination of ceramic balls and phenolic cage significantly reduces rotating mass and centrifugal forces, enabling exceptional limiting speeds up to 41,000 rpm. This makes the bearing ideal for high-frequency spindles and precision machinery.
Superior Rigidity & Load Capacity: Manufactured to P4A tolerance class with extra light preload (Class A), this bearing provides exceptional running accuracy and system stiffness. The optimized internal geometry delivers a dynamic load rating of 3780 lbf and static load rating of 3082 lbf, ensuring reliable performance under combined loading conditions.
Precision Engineering: With tight dimensional tolerances on bore diameter (45mm), outside diameter (68mm), and width (24mm), this bearing ensures precise fit and alignment in critical applications. The 21 ceramic balls with 6.35mm diameter provide smooth operation and minimal vibration.
71909 CE/HCDGAVQ126 Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision lathes
- Precision Instrumentation: Measuring equipment, optical scanners, and laboratory instruments
- High-Speed Motors: CNC spindle motors, dental handpieces, and turbo-molecular pumps
- Aerospace Systems: Gyroscopes, navigation systems, and auxiliary power units
- Medical Equipment: Dental drills, surgical handpieces, and diagnostic imaging systems
