71913 CEGA/HCPA9A
Hybrid Ceramic Super Precision Bearings
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71913 CEGA/HCPA9A Bearing Product Overview & Core Advantages
The 71913 CEGA/HCPA9A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single bearing features an extra light preload (Class A) and is manufactured to super-precision PA9A tolerance class, ensuring minimal runout and vibration. Its universal matchable (SU) design allows for flexible mounting in various preload configurations when paired with a second bearing. The combination of a ceramic ball material and phenolic cage contributes to its high-speed capability, low friction, and extended service life, making it ideal for high-rigidity and high-speed spindle systems.
71913 CEGA/HCPA9A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71913 | Basic bearing designation, indicating the bearing size (65mm bore, 90mm OD, 13mm width). |
| C | 15° contact angle. |
| E | Optimized internal design for high-speed operation. |
| G | Cage guidance on the outer ring. |
| A | Extra light preload (Class A). |
| HCPA9A | Indicates the tolerance class PA9A (super precision) and universal matching designation. |
71913 CEGA/HCPA9A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to PA9A tolerance class with extremely tight dimensional tolerances on bore, outside diameter, and width. The angular contact design and Class A preload provide superior system stiffness and precise rotational accuracy, critical for minimizing deflection under load.
- Optimized for High-Speed Operation: The lightweight phenolic resin cage and low-density ceramic (silicon nitride) balls significantly reduce centrifugal forces, enabling a high limiting speed of 32,500 rpm. This design minimizes friction and heat generation.
- Superior Load Capacity: The 15° contact angle is optimized to handle combined loads, effectively supporting significant radial loads and moderate axial loads in one direction.
- Universal Matching Capability (SU): As a universal matchable bearing, it can be paired with another identical bearing in various arrangements (back-to-back, face-to-face, or tandem) to achieve specific preload and stiffness requirements for the application.
71913 CEGA/HCPA9A Bearing Typical Application Areas
This precision bearing is specifically designed for high-performance machinery where speed, accuracy, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and engravers.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
