71903 CE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71903 CE/HCP4A
Basic Information
System of measurement
Metric
Weight
0.014 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
17 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
30 mm
Outside diameter tolerance
-0.005mm to 0
Width
7 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
13
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
760 lbf
Radial static load rating
344 lbf
Limiting speed
127 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:
$ 143.82
/ each
In Stock
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71903 CE/HCP4A Bearing Product Overview & Core Advantages
The 71903 CE/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and high-speed performance. Positioned in the P4 (ABEC-7) tolerance class, it delivers exceptional dimensional accuracy and running precision. A key feature is its ceramic ball construction, which significantly reduces centrifugal forces, lowers operating temperatures, and enables superior limiting speeds. This bearing is preloaded and lubricated from the factory, making it ready for immediate installation in high-reliability systems.
71903 CE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| CE | Ceramic Balls | Enables higher speeds, reduced weight, and superior performance in high-temperature or electrically sensitive environments. |
| HC | Phenolic (Polyamide) Cage | Provides excellent guidance at high speeds with low friction and good performance in lubricant-starved conditions. |
| P4A | P4 Tolerance Class with specific running accuracy requirements | Guarantees ultra-precise rotational accuracy and minimal runout for demanding applications. |
71903 CE/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of ceramic balls and a lightweight phenolic cage drastically reduces rotating mass, allowing the bearing to achieve a limiting speed of 127,000 rpm. This design minimizes centrifugal forces and heat generation.
- Precision & Rigidity: Manufactured to P4 tolerance and supplied with preload, this bearing offers high axial and radial rigidity, ensuring precise shaft positioning and minimal deflection under load.
- Angular Contact Design: The 15° contact angle is optimized to handle combined loads, efficiently supporting substantial axial loads in one direction alongside radial loads.
- Ready-to-Install: The bearing is pre-lubricated, simplifying installation and ensuring immediate, optimal performance without the need for initial lubrication.
71903 CE/HCP4A Bearing Typical Application Areas
This high-precision, high-speed bearing is ideally suited for:
- High-Speed Spindles in CNC machining centers and PCB drilling machines
- Precision Instrumentation and medical devices
- Turbochargers and other high-RPM automotive components
- High-Frequency Motors and aerospace actuation systems
