71922 ACD/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71922 ACD/P4ADBB
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
25 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
21510 lbf
Radial static load rating
30825 lbf
Limiting speed
16 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
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1045.47
/ each
In Stock
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71922 ACD/P4ADBB Bearing Product Overview & Core Advantages
The 71922 ACD/P4ADBB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This duplex back-to-back (DB) arrangement bearing set is preloaded to Light / Class B standards, providing superior system stiffness and rotational accuracy. Its primary advantage lies in its ability to handle combined loads—significant radial and axial loads in both directions—simultaneously. Manufactured to a P4A tolerance class, it is an ideal solution for high-precision, high-rigidity machinery where minimal deflection and runout are critical.
71922 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71922 | Basic bearing series and size designation (110mm bore, 150mm OD, 40mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a Duplex (two-bearing) set. |
| /P4A | Denotes a high-precision tolerance class (P4A), exceeding ABEC-7 standards. |
| DBB | Specifies the Back-to-Back (DB) mounting arrangement, which provides high moment rigidity. |
71922 ACD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & System Stiffness: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, making it ideal for precision spindles.
- Superior Load Capacity: The 25° contact angle and duplex design enable the bearing set to support substantial combined radial and axial loads from both directions.
- Precision Performance: Manufactured to P4A tolerance class with a phenolic cage, this bearing ensures smooth operation, low vibration, and high rotational accuracy at the specified limiting speed of 16,000 rpm.
- Optimized for Precision Applications: The open seal type allows for custom lubrication schemes, while the standard factory lubrication is suitable for the specified operating temperature range.
71922 ACD/P4ADBB Bearing Typical Application Areas
This bearing is engineered for high-performance machinery where precision and rigidity are paramount. Key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Where extreme accuracy and minimal runout are required.
- High-Frequency Machining Centers: Demanding applications that benefit from the DB arrangement's moment stiffness.
- Industrial Pumps and Compressors: For shafts requiring precise axial and radial positioning.
