71922 ACD/P4ATBTA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71922 ACD/P4ATBTA
Basic Information
System of measurement
Metric
Weight
2.58 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
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
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
Price:
$ 1568.22
/ each
In Stock
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71922 ACD/P4ATBTA Bearing Product Overview & Core Advantages
The 71922 ACD/P4ATBTA is a super-precision angular contact ball bearing designed for the most demanding applications. This triplex matched set, arranged in a Back-to-Back (TBT) configuration, delivers exceptional system rigidity and runout accuracy. Its P4A tolerance class and Extra Light (Class A) preload ensure superior rotational precision, making it ideal for high-speed spindles and other machinery requiring maximum performance under combined radial and axial loads.
71922 ACD/P4ATBTA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71922 | Basic bearing series and size designation (110mm bore, 150mm OD). |
| ACD | 25° contact angle, a standard for angular contact bearings balancing axial and radial load capacity. |
| P4A | Indicates a super-precision tolerance class with enhanced running accuracy requirements. |
| TBT | Specifies a Triplex Back-to-Back matched set of three bearings. |
| A | Denotes Extra Light preload for minimal friction and optimal high-speed operation. |
71922 ACD/P4ATBTA Bearing Structural Features & Performance Benefits
- Unmatched Rigidity and Stability: The triplex back-to-back arrangement creates a highly rigid bearing system that effectively resists moment loads and maintains precise shaft positioning, which is critical for machine tool spindles.
- Superior High-Speed Capability: The combination of a lightweight, high-strength phenolic cage, a 25° contact angle, and extra light preload enables stable operation at the high limiting speed of 10,000 rpm.
- Precision and Load Capacity: Manufactured to P4A tolerance standards with a radial dynamic load rating of 28,575 lbf, this bearing ensures long-term accuracy and reliability under significant combined loads.
- Optimized for Performance: The open seal type allows for customized lubrication schemes to further enhance speed and temperature performance within the specified temperature range of -30°C to 110°C.
71922 ACD/P4ATBTA Bearing Typical Application Areas
This super-precision angular contact ball bearing set is engineered for high-performance applications, including:
- High-Speed Machine Tool Spindles (Milling, Grinding, Drilling)
- Precision Grinding Machines
- High-frequency Main Spindles
- Other precision machinery requiring extreme rotational accuracy and system rigidity.
