71902 CD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71902 CD/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
15 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
13
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
893 lbf
Radial static load rating
428 lbf
Limiting speed
90 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:
$ 87.64
/ each
In Stock
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71902 CD/P4A Bearing Product Overview & Core Advantages
The 71902 CD/P4A is a single row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, this bearing is optimized to handle significant combined loads—both radial and axial in one direction. Its compact cross-section, with a 7 mm width, makes it ideal for space-constrained, high-speed spindles and precision instruments. The bearing is preloaded and comes pre-lubricated, ensuring immediate high-performance operation and contributing to its high rigidity and operational stability.
71902 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| C | 15° Contact Angle | Optimized for high-speed operation with balanced axial load capacity. |
| D | Enhanced internal design for higher stiffness and load rating. | Provides superior high rigidity and stability under load. |
| P4A | P4 (ABEC-7) Tolerance Class with specific running accuracy requirements. | Guarantees extremely low runout and vibration for precision bearing applications. |
71902 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single row angular contact design, combined with a 15° contact angle and phenolic resin cage, delivers excellent rotational accuracy and stiffness, which is critical for machine tool spindles.
- Superior Load Capacity: Engineered to support combined loads effectively. The dynamic load rating of 893 lbf allows it to perform reliably under demanding conditions.
- High-Speed Performance: The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 90,000 rpm, making it a true high-speed bearing.
- Preloaded & Ready-to-Use: Supplied with preload and lubrication, ensuring immediate installation and peak performance without the need for initial setup adjustments, reducing machine assembly time.
71902 CD/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for applications demanding high speed, accuracy, and rigidity, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Instrumentation
- High-Frequency Motors
- Medical Equipment (e.g., Dental handpieces)
- Aerospace Actuation Systems
