71922 CD/P4AQBCA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71922 CD/P4AQBCA
Basic Information
System of measurement
Metric
Weight
3.44 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
110 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
150 mm
Outside diameter tolerance
-0.004mm to 0
Width
80 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
37125 lbf
Radial static load rating
65250 lbf
Limiting speed
16.25 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Quadruplex Back-to-Back (QBC)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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Product Overview and Core Advantages
The 71922 CD/P4AQBCA is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. As part of a Quadruplex Back-to-Back (QBC) matched set, this bearing is engineered to handle complex combined loads, including high radial and axial loads in both directions. Manufactured to P4A tolerance class and featuring an extra light preload (Class A), it delivers superior rotational accuracy, high-speed capability, and outstanding operational stability, making it ideal for high-precision machinery.
71922 CD/P4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71922 | Basic bearing series and size designation (110mm bore, 150mm OD). |
| C | 15° contact angle, optimized for high-speed applications and axial load capacity. |
| D | Indicates a specific internal design and dimensional grouping. |
| P4A | High-Precision Tolerance Class, providing extremely tight dimensional and running accuracy. |
| QBC | Quadruplex Back-to-Back arrangement. Four bearings are precision-matched and mounted in a back-to-back configuration for maximum system rigidity and moment load resistance. |
Structural Features and Performance Benefits
- Exceptional Rigidity and Load Capacity: The Quadruplex Back-to-Back (QBC) arrangement creates an extremely stiff bearing system capable of supporting heavy combined loads and significant moment loads. The 15° contact angle further enhances axial load carrying capacity.
- High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 16,250 rpm. The optimized internal geometry ensures stable operation at high rotational velocities.
- Precision Engineering: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on the bore, outside diameter, and width. This guarantees precise shaft positioning, reduced vibration, and consistent performance.
- Optimized Material Selection: Constructed from high-grade chrome steel for both rings and balls, ensuring high durability, wear resistance, and a long operational lifespan under demanding conditions.
71922 CD/P4AQBCA Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications where precision, speed, and rigidity are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Especially in robotics and high-torque transmission systems.
- Industrial Pumps and Compressors: For handling axial and radial loads in high-speed rotors.
- Aerospace and Defense Systems: Gyroscopes, radar equipment, and other precision mechanisms.
