71911 CD/HCP4AQGB
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71911 CD/HCP4AQGB
Basic Information
System of measurement
Metric
Weight
0.61 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
80 mm
Outside diameter tolerance
-0.004mm to 0
Width
52 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
11408 lbf
Radial static load rating
13162 lbf
Limiting speed
39 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
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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71911 CD/HCP4AQGB Bearing Product Overview & Core Advantages
The 71911 CD/HCP4AQGB is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a set of four, it enables simplified installation and optimal preload configuration. Its construction with a ceramic ball and phenolic cage provides superior high-speed performance, reduced weight, and excellent thermal stability. This bearing is engineered to handle combined loads efficiently, making it an ideal choice for high-rigidity, high-speed spindles and precision machinery.
71911 CD/HCP4AQGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71911 | Basic bearing designation, indicating a light series, angular contact bearing with a 55mm bore. |
| CD | Contact angle of 15°. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls for enhanced speed and longevity. |
| P4A | High precision tolerance class (superior to ABEC 7), ensuring minimal runout and vibration. |
| Q | Optimized internal geometry for improved performance. |
| GB | Indicates the bearing is universal matchable (SU) and supplied in a set of 4 for simplified mounting and preload control. |
71911 CD/HCP4AQGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and universal matching capability allow for precise preload (Light / Class B), resulting in a very stiff bearing system capable of handling significant combined radial and axial loads.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage enables a high limiting speed of 39,000 rpm, minimizing friction and heat generation.
- Exceptional Precision: Manufactured to a P4A tolerance class, this bearing guarantees extreme dimensional and running accuracy, which is critical for applications requiring minimal vibration and high positional repeatability.
- Optimized for Matched Sets: Being universal matchable (SU) and supplied as a set of four bearings ensures consistent performance, simplifies the assembly process, and provides a reliable, pre-configured solution for complex spindle designs.
71911 CD/HCP4AQGB Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
- High-Frequency Motors and Spindles.
