71902 CE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71902 CE/HCP4ADGA Bearing Product Overview & Core Advantages
The 71902 CE/HCP4ADGA is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and performance. This universally matchable (SU) bearing is designed to handle combined loads, offering robust support for both radial and axial forces. Its construction with ceramic balls and a phenolic cage enables superior high-speed operation and reduced rotational mass. Preloaded to Extra Light / Class A and manufactured to a P4A tolerance class, it delivers outstanding running accuracy and rigidity, making it ideal for high-reliability, precision machinery.
71902 CE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71902 | Bearing series and size designation (15mm bore, 28mm OD). |
| CE | Contact angle of 15°. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls. |
| P4A | High-Precision Tolerance Class, specifying very tight dimensional and running accuracy limits. |
| DGA | Universal Matchable (SU): Indicates the bearing is supplied pre-lubricated and ground for universal matching in any combination (DB, DF, DT). |
71902 CE/HCP4ADGA Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction, heat generation, and wear, enabling higher limiting speeds and longer service life, especially in demanding environments.
- Phenolic Resin Cage: This lightweight, high-strength cage contributes to smooth operation at high speeds (230,000 rpm) and offers excellent dimensional stability with low friction.
- Precision P4A Grade: Manufactured to ultra-precise tolerances, this bearing ensures minimal runout and vibration, which is critical for applications requiring extreme positional accuracy and smooth rotation.
- Universal Matchability (SU): As part of a matched set of 2 bearings, they can be arranged in tandem, back-to-back, or face-to-face configurations to optimize rigidity and handle complex combined load scenarios.
- Pre-lubrication: The bearing comes lubricated from the factory, ready for immediate installation and initial operation within its specified temperature range (-30°C to 110°C).
71902 CE/HCP4ADGA Bearing Typical Application Areas
The 71902 CE/HCP4ADGA is ideally suited for high-performance applications, including:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Motors
- Medical and Dental Handpieces
- Aerospace Instrumentation and Gyroscopes
- Semiconductor Manufacturing Equipment
