71904 CE/P4ADT
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71904 CE/P4ADT
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
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
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
In Stock
Price available upon request.
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71904 CE/P4ADT Bearing Product Overview & Core Advantages
The 71904 CE/P4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This duplex tandem (DT) arrangement bearing set is preloaded and manufactured to P4A tolerance class, ensuring superior running accuracy and minimal vibration. Its primary advantage lies in its ability to handle high combined loads efficiently, making it ideal for high-speed spindles and precision machinery where uncompromising performance is critical.
71904 CE/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CE | High-capacity, optimized internal geometry with a 15° contact angle. |
| P4A | Indicates a high-precision tolerance class with enhanced dimensional and running accuracy requirements. |
| DT | Signifies a Duplex Tandem arrangement. Two bearings are mounted together to primarily increase axial load capacity in one direction. |
71904 CE/P4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem arrangement and preload provide exceptional system stiffness, enabling the bearing to withstand significant combined radial and axial loads with minimal deflection.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the optimized internal design and factory lubrication contribute to a high limiting speed of 100,000 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on the bore, outside diameter, and width, ensuring predictable performance and ease of installation in high-precision assemblies.
- Durable Construction: Components made from chrome steel offer high hardness and wear resistance, providing long service life under demanding operating conditions.
71904 CE/P4ADT Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Machining Centers
- Precision Grinding Spindles
- High-Speed Pumps and Compressors
