71902 CD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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71902 CD/P4ADGB Bearing Product Overview & Core Advantages
The 71902 CD/P4ADGB is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a universal matchable (SU) bearing supplied in a pre-determined duplex set, it enables simplified installation and optimal performance in high-rigidity configurations. Its P4A tolerance class ensures ultra-precise running accuracy, making it ideal for machine tool spindles and other precision equipment requiring minimal runout and vibration.
71902 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71902 | Basic bearing series designation for super-precision angular contact bearings |
| C | 15° contact angle, optimized for high-speed applications |
| D | Duplex arrangement (two bearings supplied as a set) |
| P4A | Ultra-precision tolerance class with enhanced running accuracy requirements |
| DB | Back-to-back mounting arrangement for maximum rigidity and moment load capacity |
71902 CD/P4ADGB Bearing Structural Features & Performance Benefits
High-Speed Capability: The phenolic resin cage and optimized 15° contact angle enable stable operation at limiting speeds up to 230,000 rpm, making it suitable for high-frequency spindles.
Superior Rigidity: The universal matchable (SU) design with back-to-back (DB) arrangement provides exceptional system stiffness, effectively resisting moment loads and maintaining precision under heavy cutting forces.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration for superior surface finish in machining applications.
Optimized Load Distribution: With 13 precision-grade chrome steel balls and carefully calculated ball diameter (3.969mm), the bearing delivers balanced dynamic load capacity (1462 lbf) for extended service life.
71902 CD/P4ADGB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision boring machines
- Precision Instrumentation: Measuring equipment, optical scanners, and coordinate measuring machines
- High-Frequency Motors: Spindle motors for PCB drilling and semiconductor manufacturing equipment
- Medical Equipment: Dental handpieces and laboratory automation systems requiring ultra-precise rotation
- Aerospace Components: Gyroscopes and navigation system components demanding exceptional accuracy
