S71904 CE/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71904 CE/P4A
Basic Information
System of measurement
Metric
Weight
0.035 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
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
56 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:
$ 188.63
/ each
In Stock
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S71904 CE/P4A Bearing Product Overview & Core Advantages
The S71904 CE/P4A is a super-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and high-speed performance. As a single-row bearing with a 15° contact angle, it is optimized to support combined loads—handling significant radial loads alongside thrust loads in one direction. Its P4 (ABEC-7) tolerance class ensures minimal runout and vibration, making it ideal for high-precision spindles and machinery. The bearing comes preloaded for immediate high rigidity and is pre-lubricated for long-term, maintenance-free operation within a wide temperature range.
S71904 CE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings. |
| 1904 | Standard size designation: 20mm bore, 37mm OD, 9mm width. |
| CE | Indicates a contact angle of 15° and a specific internal design optimized for high-speed operation. |
| P4A | Denotes a P4 (ABEC-7) tolerance class with specific dimensional and running accuracy requirements for precision applications. |
S71904 CE/P4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The phenolic resin cage offers low weight and excellent sliding properties, contributing to the high limiting speed of 56,000 rpm. The optimized internal geometry with a 15° contact angle further enhances high-speed stability.
- High Rigidity and Precision: Manufactured to P4 tolerance standards, this bearing provides exceptional dimensional stability and running accuracy. The availability of preload eliminates internal clearance, resulting in a very stiff bearing system that minimizes deflection under load.
- Superior Load Capacity: The angular contact design efficiently supports combined (radial and axial) loads. With 14 high-precision chrome steel balls, it offers a dynamic load rating of 1112 lbf and a static load rating of 531 lbf.
- Sealed and Lubricated for Life: As a sealed and pre-lubricated bearing, it is protected from contamination and is designed for long service life without maintenance, operating reliably from -30°C to 110°C.
S71904 CE/P4A Bearing Typical Application Areas
This bearing is engineered for high-performance machinery where precision and speed are critical. Key applications include:
- High-Frequency Spindles for PCB drilling and milling
- Precision Machine Tool Spindles
- High-Speed Motors and encoders
- Medical and Dental Handpieces
- Advanced Robotics and precision gearboxes
