71911 CE/HCP4AH1DBA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71911 CE/HCP4AH1DBA Bearing Product Overview & Core Advantages
The 71911 CE/HCP4AH1DBA is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex back-to-back (DB) matched set is preloaded to Extra light (Class A) standards, delivering superior rotational accuracy and system rigidity. Its use of ceramic balls and a phenolic cage enables outstanding high-speed performance, with a limiting speed of 34,000 rpm. Engineered to handle combined loads, this bearing is ideal for high-precision, high-reliability machinery where minimal runout and thermal stability are critical.
71911 CE/HCP4AH1DBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| 71911 CE | High-Precision Angular Contact Bearing Series | Defines the core geometry and high-precision nature of the bearing. |
| HC | Hybrid Ceramic (Silicon Nitride Balls) | Reduces centrifugal forces, lowers friction, and enables higher speeds and longer service life. |
| P4A | High Precision Tolerance Class (Superior to ABEC 7) | Ensures extremely tight dimensional and running accuracy for superior system performance. |
| H1 | Preload Code (Extra Light / Class A) | Provides optimal stiffness and rotational accuracy for high-speed applications. |
| DB | Duplex Back-to-Back Arrangement | Enhances moment load capacity and system rigidity. |
| A | 15° Contact Angle | Optimized for high-speed operation with excellent axial load capacity. |
71911 CE/HCP4AH1DBA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces weight and inertial forces, enabling higher limiting speeds and providing non-conductive properties. This construction also offers improved resistance to wear and operation in marginal lubrication conditions.
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement and Class A preload create a highly rigid bearing system capable of withstanding combined radial and axial loads as well as moment loads, ensuring precise shaft positioning and minimal deflection.
Superior High-Speed Performance: The lightweight phenolic resin cage is engineered for high rotational speeds, offering excellent strength and guidance with minimal friction. Combined with the hybrid ceramic design, this allows the bearing to achieve its remarkable 34,000 rpm limiting speed.
Precision Engineering: Manufactured to P4A tolerance class, this bearing guarantees tight control over bore diameter, outside diameter, and width, resulting in exceptional running accuracy and consistent performance in the most demanding precision spindle applications.
71911 CE/HCP4AH1DBA Bearing Typical Application Areas
The 71911 CE/HCP4AH1DBA is specified for high-performance machinery where speed, accuracy, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors: Spindles for integrally mounted motor applications.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
