71924 CD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71924 CD/P4A
Basic Information
System of measurement
Metric
Weight
1.15 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
120 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
165 mm
Outside diameter tolerance
-0.01mm to 0
Width
22 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
14.288 mm
Ball quantity
28
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
17550 lbf
Radial static load rating
20588 lbf
Limiting speed
12 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
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:
$ 1648.8
/ each
In Stock
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71924 CD/P4A Bearing Product Overview & Core Advantages
The 71924 CD/P4A is a single row angular contact ball bearing designed for high-precision applications requiring superior rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, this bearing excels in handling combined loads, primarily thrust loads in one direction, with a 15° contact angle that optimizes performance for high-speed operation. Its key advantages include high rigidity from its precision-ground components and phenolic cage, and the availability of preload for enhanced system stiffness and reduced vibration.
71924 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71924 | Basic bearing designation, indicating a single row angular contact ball bearing with a 120mm bore, 165mm OD, and 22mm width. |
| CD | Indicates a specific contact angle (15°) and internal design optimized for high rigidity and precise operation. |
| P4 | Specifies the tolerance class, equivalent to ABEC-7, denoting very high dimensional and running accuracy. |
| A | Denotes that the bearing is supplied with a specific preload for immediate high-stiffness performance upon installation. |
71924 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance standards with a phenolic resin cage, this bearing ensures minimal runout and high dimensional stability, which is critical for high-speed applications up to 12,000 rpm.
- Optimized Load Capacity: The 15° contact angle is engineered to efficiently handle significant one-direction thrust loads in combination with radial loads, making it ideal for applications with demanding combined load requirements.
- Superior High-Speed Performance: The lightweight and robust phenolic cage, combined with precision-ground chrome steel rings and balls, minimizes centrifugal forces and friction, enabling stable operation at the specified limiting speed.
- Preload Availability: The availability of preload allows for immediate system stiffness, reducing deflection and improving the dynamic response of the spindle or assembly.
71924 CD/P4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for high-performance machinery where accuracy and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Spindles: In PCB drilling, semiconductor manufacturing, and other high-accuracy processes.
- High-Frequency Motors: Where low vibration and high rotational accuracy are required.
- Medical and Laboratory Equipment: Such as centrifuges and precision scanners.
