S71904 CEGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71904 CEGA/P4A
Basic Information
System of measurement
Metric
Weight
0.035 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
20 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
37 mm
Outside diameter tolerance
-0.004mm to 0
Width
9 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
14
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1112 lbf
Radial static load rating
531 lbf
Limiting speed
75 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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S71904 CEGA/P4A Bearing Product Overview & Core Advantages
The S71904 CEGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. As a single bearing with a 15° contact angle, it is engineered to accommodate combined loads—simultaneously handling radial loads and axial loads in one direction. Its P4A tolerance class ensures ultra-precise running accuracy, while the extra light preload (Class A) minimizes friction and heat generation, making it ideal for high-speed spindles and other high-reliability machinery where rotational precision is paramount.
S71904 CEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| CE | Enhanced internal geometry and optimized contact conditions. | Improved running accuracy and lower noise/vibration levels. |
| GA | Light preload, Class A. | Reduces deflection and ensures stable performance at high speeds. |
| P4A | Tolerance class stricter than ABEC 7 (P4). | Guarantees superior dimensional and running accuracy for precision applications. |
S71904 CEGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and phenolic cage provide excellent structural stability, enabling the bearing to support significant combined radial and axial loads.
- Superior High-Speed Performance: The lightweight phenolic cage, combined with the optimized internal geometry and extra light preload, allows for a high limiting speed of 75,000 rpm, making it suitable for very demanding spindle applications.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width, ensuring consistent, high-precision performance.
- Universal Matching (SU): The bearing is universally matchable, allowing for flexible arrangement in sets (up to 4 bearings) to achieve the required stiffness and load capacity without selective mounting.
S71904 CEGA/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance machinery, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Systems: High-frequency motors and spindles.
- Medical Equipment: Dental handpieces and small surgical tools.
- Aerospace Instrumentation: Gyroscopes and navigation systems.
