71906 CE/HCPA9AQGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71906 CE/HCPA9AQGA
Basic Information
System of measurement
Metric
Weight
0.18 kg
Tolerance class
PA9A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
30 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.004mm to 0
Width
36 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
18
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3330 lbf
Radial static load rating
2902 lbf
Limiting speed
100.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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71906 CE/HCPA9AQGA Bearing Product Overview & Core Advantages
The 71906 CE/HCPA9AQGA is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional speed and accuracy. Its ceramic ball construction and PA9A tolerance class deliver superior performance in high-velocity environments. This bearing is designed to handle combined loads efficiently, offering high rigidity and reliable operation. As part of a universally matchable (SU) set of four, it enables versatile and precise bearing arrangements, making it ideal for complex spindle designs and other high-performance machinery.
71906 CE/HCPA9AQGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| CE | Ceramic Balls | Reduced weight, lower friction, and superior performance at high speeds and temperatures. |
| HC | High Capacity / Phenolic Cage | Enhanced strength and durability for demanding operating conditions. |
| PA9A | Ultra-Precision Tolerance Class (PA9A) | Guarantees extremely tight dimensional and running accuracy for high-precision applications. |
| QGA | Universal Matchable (SU) / Extra Light Preload (A) | Allows for flexible mounting in sets (X or O arrangements) to achieve optimal rigidity and preload. |
71906 CE/HCPA9AQGA Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of ceramic balls and a lightweight phenolic cage significantly reduces centrifugal forces, enabling operation at the limiting speed of 100,500 rpm.
- Exceptional Rigidity and Load Capacity: The angular contact design with a 15° contact angle provides high rigidity, effectively supporting combined radial and axial loads (Dynamic: 3330 lbf, Static: 2902 lbf).
- Ultra-Precision Performance: Manufactured to PA9A tolerance class with extremely tight bore, outside diameter, and width tolerances, ensuring minimal runout and vibration for superior accuracy.
- Optimized for Matched Sets: The Universal Matchable (SU) designation means bearings can be mounted in any combination to form precisely preloaded sets, simplifying assembly and enhancing system performance.
71906 CE/HCPA9AQGA Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Robotics and Automation Equipment
- High-Frequency Motors and Spindles
- Aerospace Instrumentation and Control Systems
- Medical and Dental Drill Handpieces
