71922 CD/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71922 CD/P4ADBA
Basic Information
System of measurement
Metric
Weight
1.72 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
40 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
22725 lbf
Radial static load rating
32175 lbf
Limiting speed
10 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
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
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71922 CD/P4ADBA Bearing Product Overview & Core Advantages
The 71922 CD/P4ADBA is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As a duplex back-to-back (DB) arrangement bearing set, it is preloaded to deliver superior system stiffness and minimize axial and radial runout. This configuration is engineered to handle combined loads—simultaneous radial and axial forces—with high reliability. Manufactured to the exacting P4A tolerance class, it guarantees ultra-precise dimensions and running accuracy, making it an ideal choice for high-speed spindles and other precision machinery where uncompromising performance is critical.
71922 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71922 | Basic bearing designation, indicating a high-precision angular contact bearing series with a 110 mm bore, 150 mm OD, and 40 mm width. |
| C | Indicates a 15° contact angle, optimized for handling high axial loads in combination with radial loads. |
| D | Signifies the bearing is part of a duplex pair (a matched set of two bearings). |
| DB | Specifies the Back-to-Back arrangement of the duplex pair, which provides high moment rigidity and excellent stability. |
| P4A | Denotes an ultra-high precision tolerance class, with extremely tight limits on bore, outside diameter, and width tolerances, ensuring superior running accuracy. |
71922 CD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, crucial for maintaining precision under heavy combined loads.
- Superior Load Capacity: The 15° contact angle and optimized internal geometry enable the bearing to efficiently support significant radial loads and bidirectional axial loads simultaneously.
- Optimized High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and ensures stable operation at high rotational speeds, with a limiting speed of 10,000 rpm.
- Precision Engineering: Adherence to the P4A tolerance class ensures minimal runout and vibration, which is fundamental for applications requiring extreme accuracy and smooth operation.
- Durable Construction: Manufactured from high-grade chrome steel for both rings and balls, providing excellent wear resistance and long service life.
71922 CD/P4ADBA Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications demanding the highest levels of accuracy and surface finish.
- High-Frequency Motors: Spindles for PCB drilling and other high-RPM electric motors.
- Industrial Pumps & Compressors: Where reliable performance under combined loads is essential.
