71904 CE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71904 CE/HCP4A
Basic Information
System of measurement
Metric
Weight
0.032 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
106 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:
$ 157.55
/ each
In Stock
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71904 CE/HCP4A Bearing Product Overview & Core Advantages
The 71904 CE/HCP4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and speed capabilities. Featuring a P4 (ABEC-7) tolerance class and a 15° contact angle, this bearing is optimized to handle significant axial loads in one direction while supporting moderate radial loads. Its compact design, with a 20 mm bore and 9 mm width, makes it ideal for space-constrained, high-performance assemblies. The combination of a phenolic cage and ceramic balls enables superior high-speed performance and reduced rotational inertia.
71904 CE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CE | Indicates the use of ceramic balls (typically silicon nitride), providing higher speed capability, reduced weight, and improved corrosion resistance. |
| HC | Refers to a phenolic (polyamide) cage, offering excellent strength-to-weight ratio and suitability for high-speed operation. |
| P4A | Denotes a P4 precision class (ABEC-7) with specific internal geometry optimizations (A designation) for superior running accuracy. |
71904 CE/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The lightweight phenolic cage and ceramic balls significantly reduce centrifugal forces, allowing for a limiting speed of 106,000 rpm and lower operating temperatures.
- Precision & Rigidity: Manufactured to P4 tolerance class with a 15° contact angle, this bearing provides high running accuracy and rigidity for precise shaft positioning.
- Optimized Load Capacity: The angular contact design is engineered to carry high axial loads and combined loads efficiently, with a dynamic load rating of 1112 lbf.
- Preload Availability: Designed to be used with a preload, which increases system stiffness, reduces noise and vibration, and enhances rotational accuracy.
71904 CE/HCP4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for demanding applications such as:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors and Spindles
- Aerospace Actuators and Control Systems
- Medical and Dental Handpiece Drives
