71902 ACE/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71902 ACE/P4A
Basic Information
System of measurement
Metric
Weight
0.015 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
15 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
28 mm
Outside diameter tolerance
-0.005mm to 0
Width
7 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
12
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
691 lbf
Radial static load rating
290 lbf
Limiting speed
106 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:
$ 133.24
/ each
In Stock
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71902 ACE/P4A Bearing Product Overview & Core Advantages
The 71902 ACE/P4A is a single-row angular contact ball bearing designed for applications demanding high precision and superior running accuracy. Engineered to a P4 (ABEC-7) tolerance class, it is optimized to accommodate primarily axial loads in one direction, as well as combined loads. Its compact design, with a 15 mm bore and 7 mm width, makes it ideal for space-constrained, high-speed applications such as precision spindles. The bearing is preloaded and comes pre-lubricated, ensuring immediate operational readiness and consistent performance.
71902 ACE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71902 | Basic bearing series and size designation (15mm bore, 28mm OD). |
| ACE | A 25° contact angle design, optimized for high axial load capacity. |
| P4A | Indicates a P4 (ABEC-7) tolerance class with specific accuracy requirements for high-precision applications. |
71902 ACE/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4 tolerance with a phenolic resin cage, this bearing ensures minimal vibration and high running accuracy, providing stable and rigid support for shafts.
- Optimized Load Capacity: The 25° contact angle is engineered to efficiently support high axial loads in one direction and combined (radial and axial) loads.
- Superior High-Speed Performance: The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 106,000 rpm, making it suitable for demanding high-speed operations.
- Ready-to-Install: The bearing is supplied pre-lubricated and is open on both sides, allowing for custom lubrication regimes if required for specific operational environments.
71902 ACE/P4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for:
- Machine Tool Spindles
- High-Frequency Electric Spindles
- Precision Grinding Applications
- High-Speed Pumps and Compressors
- Robotic Drives and Precision Gearboxes
