71904 CE/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71904 CE/P4A
Basic Information
System of measurement
Metric
Weight
0.036 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
20 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
37 mm
Outside diameter tolerance
-0.006mm 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° to 110 °C
Radial dynamic load rating
1112 lbf
Radial static load rating
531 lbf
Limiting speed
88 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:
$ 157.62
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71904 CE/P4A Bearing Product Overview & Core Advantages
The 71904 CE/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and high-speed performance. As a P4 (ABEC-7) tolerance class bearing, it is designed to handle significant combined loads (radial and axial) simultaneously, with a contact angle optimized for axial load capacity. Its compact design, featuring a 20 mm bore and 9 mm width, makes it ideal for space-constrained, high-reliability machinery requiring exceptional rotational accuracy and rigidity.
71904 CE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance & Benefit |
|---|---|---|
| CE | Contact Angle (15°) and Internal Design | Specifies the optimized contact angle for efficient axial load carrying capacity. |
| P4A | Tolerance Class (P4 / ABEC-7) with Specific Accuracy Requirements | Denotes a high-precision bearing with extremely tight dimensional and running accuracy tolerances, ensuring smooth, low-vibration operation. |
71904 CE/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class with a phenolic resin cage, this bearing provides superior dimensional stability and minimal runout, essential for applications requiring high positional accuracy.
- Optimized Load Capacity: The 15° contact angle is engineered to support substantial combined loads, making it capable of handling both radial forces and unidirectional axial thrust effectively.
- Superior High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the optimized internal geometry and pre-lubrication contribute to a high limiting speed of 88,000 rpm, making it an excellent high-speed bearing.
- Preload and Matched Arrangements: The bearing is supplied with a preload, which increases system stiffness, reduces noise and vibration, and enhances rotational accuracy. It is available as a single bearing for specific arrangements.
71904 CE/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Electric Spindles
- Precision Grinding Equipment
- High-Speed Pumps and Compressors
- Robotic Arms and Precision Gearboxes
