71904 CE/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71904 CE/P4ADGA
Basic Information
System of measurement
Metric
Weight
0.072 kg
Tolerance class
P4A
Seal type
Open
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
18 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
1784 lbf
Radial static load rating
1069 lbf
Limiting speed
100 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
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
No drawings available at the moment, will be launched soon
In Stock
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71904 CE/P4ADGA Bearing Product Overview & Core Advantages
The 71904 CE/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class, this bearing features an Extra Light (A) preload and is supplied lubricated for immediate operation. Its key advantage lies in its universal matchable (SU) design, allowing two bearings to be paired in a back-to-back (DB) or face-to-face (DF) arrangement to optimize rigidity and handle combined loads. This makes it an ideal solution for high-precision spindles and other critical machinery.
71904 CE/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| CE | Contact angle of 15° | Optimized for handling axial loads in one direction while supporting radial loads. |
| P4A | High precision tolerance class | Ensures extremely tight running accuracy and minimal vibration for superior performance. |
| DGA | Universal Matchable (SU) bearing with Extra Light preload | Enables flexible mounting configurations to achieve desired system rigidity and preload. |
71904 CE/P4ADGA Bearing Structural Features & Performance Benefits
- High-Speed Capability: The phenolic cage and optimized internal geometry contribute to a high limiting speed of 100,000 rpm, making it suitable for demanding high-speed applications.
- Precision & Rigidity: Manufactured to P4A tolerance standards with an extra light preload, this bearing provides high running accuracy and enhanced system stiffness, minimizing deflection under load.
- Superior Load Capacity: The 15° contact angle and robust construction of chrome steel components enable it to carry significant radial dynamic load ratings (1784 lbf) and axial loads simultaneously.
- Matched Set Performance: As a universal matchable (SU) bearing, it can be paired with another identical bearing to form a pre-loaded set, effectively doubling the rigidity and accommodating complex combined loads.
71904 CE/P4ADGA Bearing Typical Application Areas
This precision angular contact ball bearing is engineered for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Machining Centers
- Precision Grinding Spindles
- High-Speed Robotics
- Medical and Dental Equipment
- Aerospace Instrumentation
