S71904 CE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71904 CE/HCP4A
Basic Information
System of measurement
Metric
Weight
0.031 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
68 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 188.78
/ each
In Stock
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S71904 CE/HCP4A Bearing Product Overview & Core Advantages
The S71904 CE/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional speed and rigidity. Engineered to accommodate combined loads (radial and axial loads simultaneously), its compact design is ideal for high-speed spindles and precision machinery. Key advantages include its ceramic ball construction for reduced weight and increased limiting speed, a P4 (ABEC-7) tolerance class for superior running accuracy, and preload availability for enhanced system stiffness and rotational precision.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S71904 | Series designation for a high-precision, 15° contact angle angular contact ball bearing. |
| CE | Indicates the use of Hybrid Ceramic balls (Silicon Nitride). |
| HC | Specifies a Phenolic Resin (Laminated) Cage. |
| P4A | Denotes a P4 (ABEC-7) tolerance class with specific internal running accuracy requirements. |
S71904 CE/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed Performance: The combination of ceramic balls and a lightweight phenolic cage significantly reduces centrifugal forces, enabling a high limiting speed of 68,000 rpm. This makes it an ideal high-speed bearing.
- High Rigidity & Precision: The 15° contact angle and availability of preload provide high axial rigidity and precise rotational accuracy, essential for applications like machine tool spindles.
- Superior Load Capacity: Designed to handle combined loads effectively, with a dynamic load rating of 1112 lbf and static load rating of 531 lbf.
- Extended Service Life & Thermal Stability: The phenolic cage offers excellent dimensional stability and low friction, while the hybrid construction provides superior performance across the specified temperature range (-30° to 110 °C).
S71904 CE/HCP4A Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications, including:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Robotics and Automation
- Medical and Dental Handpieces
- Aerospace Instrumentation and Auxiliary Systems
