71902 CEGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71902 CEGB/P4A
Basic Information
System of measurement
Metric
Weight
0.015 kg
Tolerance class
P4A
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
-0.004mm to 0
Width
7 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
718 lbf
Radial static load rating
308 lbf
Limiting speed
140 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
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
Price available upon request.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71902 CEGB/P4A Bearing Product Overview & Core Advantages
The 71902 CEGB/P4A is a single-row angular contact ball bearing engineered for ultra-high precision applications. Positioned within the demanding P4A tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its primary advantage lies in its ability to support combined loads—handling significant radial loads alongside substantial axial loads in one direction. Featuring a light preload (Class B) and universal matchable (SU) design, it is optimized for high-speed operation and can be precisely paired with a second bearing to form a rigid, preloaded set, making it ideal for spindles and other high-reliability machinery.
71902 CEGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71902 | Basic bearing series and size designation | Indicates a metric, 15mm bore, 28mm OD, 7mm width angular contact bearing. |
| C | 15° Contact Angle | Optimized for high-speed performance with a good balance of radial and axial load capacity. |
| E | Optimized Internal Design | Enhanced internal geometry for higher speed and lower noise. |
| G | Universal Matchable (SU) | Allows for flexible mounting arrangements (face-to-face, back-to-back) when paired with another bearing. |
| B | Light Preload (Class B) | Pre-applied internal load increases rigidity, reduces vibration, and improves running accuracy. |
| P4A | High-Precision Tolerance Class | Denotes extremely tight dimensional and running accuracy tolerances, superior to ABEC 7. |
71902 CEGB/P4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of a 15° contact angle, a lightweight phenolic resin cage, and an optimized internal (E) design enables a very high limiting speed of 140,000 rpm.
- High Rigidity & Precision: The light preload (Class B) eliminates internal clearance, significantly increasing system stiffness and ensuring precise, chatter-free rotation, which is critical for P4A precision bearings.
- Superior Load Capacity: The angular contact design is engineered to handle combined radial and axial loads simultaneously. With a dynamic load rating of 718 lbf, it offers reliable performance under demanding conditions.
- Universal Matching: The Universal Matchable (SU) feature allows two identical 71902 CEGB bearings to be mounted together in various configurations to support bidirectional axial loads and create an extremely rigid bearing system.
- Precision Materials: Manufactured from chrome steel for rings and balls, ensuring high durability, wear resistance, and a long operational life.
71902 CEGB/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is specifically designed for high-performance applications requiring exceptional speed and accuracy, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Frequency Spindles: PCB drilling and routing spindles.
- Robotics: High-precision joints and actuators.
- Medical Equipment: Dental handpieces and small surgical tools.
