71922 ACD/PA9ATBTD
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71922 ACD/PA9ATBTD
Basic Information
System of measurement
Metric
Weight
2.58 kg
Tolerance class
PA9A
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
60 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
28575 lbf
Radial static load rating
45900 lbf
Limiting speed
10 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
Universal matching bearing
No (Standard)
Preload
Heavy / Class D
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 ACD/PA9ATBTD Bearing Product Overview & Core Advantages
The 71922 ACD/PA9ATBTD is a precision angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. This bearing is supplied as a matched triplex set in a back-to-back (TBT) arrangement with a heavy preload (Class D), making it ideal for supporting combined radial and axial loads simultaneously. Manufactured to an ultra-precise PA9A tolerance class and featuring a phenolic cage, it delivers superior performance in high-speed, high-stiffness applications such as machine tool spindles, ensuring reliable operation and extended service life.
71922 ACD/PA9ATBTD Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle, optimized for high axial load capacity. |
| PA9A | Indicates an ultra-high precision tolerance class for both bore and outside diameter, ensuring minimal runout and superior rotational accuracy. |
| TBTD | Specifies a Triplex Back-to-Back matched set with a Heavy preload (Class D). This configuration provides maximum system rigidity and moment load resistance. |
71922 ACD/PA9ATBTD Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The triplex back-to-back arrangement with a heavy preload creates an exceptionally rigid bearing system, effectively resisting complex moment loads and minimizing deflection under operation.
- Superior Load Capacity: The 25° contact angle and robust construction enable the bearing to handle significant combined radial and axial loads simultaneously, making it suitable for demanding applications.
- High-Speed Capability: The lightweight phenolic cage reduces centrifugal forces, allowing for a high limiting speed of 10,000 rpm, which is critical for spindle applications.
- Precision Performance: Manufactured to PA9A tolerance class with tight dimensional control on the bore diameter and outside diameter, this bearing ensures smooth, precise, and vibration-free rotation.
- Optimized for Performance: The use of chrome steel for rings and balls, combined with 28 balls of 12.7 mm diameter, provides excellent durability and load distribution.
71922 ACD/PA9ATBTD Bearing Typical Application Areas
This precision bearing is engineered for high-performance machinery where accuracy and rigidity are paramount. Key applications include:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Gearboxes
- High-Frequency Motors
- Industrial Robotics (Arm joints and rotary units)
- Aerospace Actuation Systems
