71902 CEGC/PA9A
71900 Series Super Precision Angular Contact Ball Bearings
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71902 CEGC/PA9A Bearing Product Overview & Core Advantages
The 71902 CEGC/PA9A is a high-precision single row angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. Engineered with a 15° contact angle and Moderate (Class C) preload, this bearing is optimized to handle combined loads, efficiently supporting significant thrust loads in one direction alongside radial loads. Its PA9A tolerance class ensures ultra-precision running accuracy, making it ideal for high-speed spindles and other demanding machinery. The phenolic resin cage contributes to smooth operation at high speeds, while the universal matching (SU) designation allows for flexible arrangement in sets to achieve desired stiffness and load capacity.
71902 CEGC/PA9A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71902 | Basic bearing series and size designation. |
| CE | Indicates a universally matchable bearing designed to be mounted in sets (in this case, sets of 4) to provide preload and high system rigidity. |
| GC | Specifies the Moderate preload (Class C) for enhanced stiffness and precise shaft positioning. |
| PA9A | Denotes the high-precision tolerance class, ensuring extremely tight dimensional and running accuracy for critical applications. |
71902 CEGC/PA9A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The single row angular contact design, combined with the Class C preload, delivers high system rigidity and minimizes axial and radial runout, which is critical for machining accuracy.
Superior Load Capacity: With a 15° contact angle, this bearing is engineered to handle substantial combined loads, offering excellent performance for applications with dominant thrust loads.
Optimized High-Speed Performance: The lightweight and robust phenolic cage ensures stability and reduced centrifugal forces, enabling a high limiting speed of 95,000 rpm. The open design and factory lubrication are tailored for efficient operation within this range.
Universal Matchability: As a Universal Matchable (SU) bearing, the 71902 CEGC/PA9A can be paired with other identical bearings in various arrangements (back-to-back, face-to-face, or tandem) to create a matched set that meets specific application requirements for preload and stiffness without selective mounting.
71902 CEGC/PA9A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications where speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors and Spindles: PCB drilling spindles and dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and navigation instruments.
