71902 CE/HCPA9ADGA
Hybrid Ceramic Super Precision Bearings
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Ball & Washer Dimensions
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71902 CE/HCPA9ADGA Bearing Product Overview & Core Advantages
The 71902 CE/HCPA9ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and speed. Engineered as a universally matchable (SU) pair, this bearing excels at handling combined loads—simultaneously supporting significant radial and axial forces. Its extra light preload (Class A) ensures minimal friction and smooth operation, making it ideal for high-speed spindles and precision instruments. The combination of a phenolic cage and ceramic balls contributes to its low weight, high rigidity, and superior performance in high-velocity environments.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71902 | Bearing series and size designation (15mm bore, 28mm OD) |
| CE | Contact angle of 15° |
| HCPA9A | High precision tolerance class (PA9A) with universal matching capability |
| DGA | Preloaded universal match set (2 bearings) |
71902 CE/HCPA9ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The angular contact design and universal matching create a highly rigid bearing system capable of handling complex combined loads from multiple directions. The 15° contact angle provides optimal balance between radial and axial load capacity.
High-Speed Performance: The phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at limiting speeds up to 140,000 rpm. Combined with ceramic balls that reduce centrifugal forces and minimize friction, this bearing delivers exceptional high-speed performance.
Precision Engineering: Manufactured to PA9A tolerance class with tight dimensional controls (bore and OD tolerance: -0.004mm to 0), ensuring consistent performance and precise running accuracy in critical applications.
Temperature Stability: The phenolic cage and ceramic balls provide stable operation across a wide temperature range from -30°C to 110°C, maintaining dimensional stability under varying thermal conditions.
71902 CE/HCPA9ADGA Bearing Typical Application Areas
This precision bearing is specifically designed for applications requiring high rotational accuracy and speed:
- Machine Tool Spindles - High-speed machining centers and precision grinding machines
- Precision Instruments - Measuring equipment and optical devices requiring minimal vibration
- High-Speed Motors - Servo motors and spindle drives demanding low friction and high accuracy
- Aerospace Components - Guidance systems and instrumentation requiring reliability at extreme speeds
- Medical Equipment - Dental handpieces and laboratory instruments needing precision and cleanliness
