71902 CDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71902 CDGA/P4A Bearing Product Overview & Core Advantages
The 71902 CDGA/P4A is a single-row angular contact ball bearing designed for applications requiring ultra-high precision and exceptional rotational accuracy. Operating under P4A tolerance class, this bearing delivers superior dimensional stability and runout control. Its extra light preload (Class A) minimizes deflection under light loads while maintaining precise shaft positioning. Manufactured from chrome steel with a phenolic cage, it offers optimal performance in high-speed applications up to 230,000 rpm. The bearing comes pre-lubricated and is universal matchable (SU), allowing for flexible mounting configurations in paired arrangements to handle combined radial and axial loads.
71902 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Implication |
|---|---|---|
| 71902 | Basic bearing designation with 15mm bore | Standard metric angular contact bearing series |
| CDGA | Contact angle 15° with universal matching capability | Optimized for combined loads and flexible mounting arrangements |
| P4A | Ultra-precision tolerance class | Exceptional dimensional accuracy and running precision |
71902 CDGA/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: The P4A tolerance class ensures minimal dimensional variation, providing consistent performance in demanding applications. The 15° contact angle offers an optimal balance between radial and axial load capacity.
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio, reducing centrifugal forces and enabling operation at limiting speeds of 230,000 rpm. The optimized ball quantity (13) and ball diameter (3.969 mm) configuration minimizes friction and heat generation.
Superior Rigidity: The extra light preload (Class A) enhances system stiffness while maintaining smooth operation. The chrome steel construction of both rings and balls ensures dimensional stability under thermal variations.
Universal Matching Design: As a universal matchable (SU) bearing, it can be paired in various configurations (back-to-back, face-to-face, or tandem) to accommodate specific application requirements for combined load conditions.
71902 CDGA/P4A Bearing Typical Application Areas
- High-speed machine tool spindles requiring ultra-precision rotation
- Precision grinding machinery spindles and rotary tables
- Medical and dental equipment requiring high rotational accuracy
- Aerospace instrumentation and guidance systems
- Semiconductor manufacturing equipment with stringent precision requirements
- High-frequency motor spindles in industrial automation
- Optical and measuring instruments demanding minimal runout
