7011 ACEGA/HCP4AH1
Hybrid Ceramic Super Precision Bearings
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7011 ACEGA/HCP4AH1 Bearing Product Overview & Core Advantages
The 7011 ACEGA/HCP4AH1 is a single-row angular contact ball bearing engineered for ultra-high precision and high-speed applications. Positioned in the P4A super-precision tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its defining feature is the 25° contact angle and ceramic ball construction, which significantly enhances high-speed performance and reduces centrifugal forces. Preloaded to Extra light (Class A), this bearing is universally matchable (SU), allowing for precise axial play adjustment when mounted in pairs. It is ideally suited for machine tool spindles and other demanding equipment requiring superior rigidity and minimal thermal expansion.
7011 ACEGA/HCP4AH1 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Implication |
|---|---|---|
| 7011 | Basic bearing series and size designation (55mm bore, 90mm OD) | Standardized bearing dimensions for interchangeability. |
| A | 30° contact angle (standard for this series) | Optimized for combined radial and axial loads. |
| CEGA | Internal designator for enhanced high-speed performance and universal matching (SU) | Enables precise preload control in paired arrangements for maximum system rigidity. |
| HC | Hybrid Ceramic construction (Ceramic balls, Steel rings) | Reduces friction and heat generation, enabling higher limiting speeds and longer service life. |
| P4A | Super Precision Tolerance Class | Guarantees extremely tight dimensional and running accuracy for precision bearing applications. |
| H | Stabilized for high-temperature operation | Maintains dimensional stability across the specified temperature range (-30°C to 110°C). |
7011 ACEGA/HCP4AH1 Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The use of ceramic balls with steel rings results in lower density, reduced centrifugal force, and superior electrical insulation. This directly contributes to the high limiting speed of 34,000 rpm and reliable operation in electrically sensitive environments.
Phenolic Resin Cage: The lightweight and robust phenolic cage ensures excellent guidance of the ceramic balls at high speeds, offering low friction, good dimensional stability, and resistance to centrifugal forces.
High Rigidity & Load Capacity: The 25° contact angle and P4A precision grinding enable this bearing to effectively support significant combined loads (radial and axial) while providing high system rigidity. With a dynamic load rating of 3578 lbf, it is built for demanding applications.
Universal Matching (SU): As a universally matchable bearing, any two 7011 ACEGA/HCP4AH1 bearings can be paired face-to-face, back-to-back, or in tandem to achieve the required preload and stiffness, simplifying inventory and assembly for complex spindle designs.
7011 ACEGA/HCP4AH1 Bearing Typical Application Areas
- High-Frequency Machine Tool Spindles: For CNC milling, grinding, and turning centers where speed, accuracy, and thermal stability are critical.
- Precision Robotic Drives: Used in high-precision robotic arms and joints requiring minimal backlash and high rigidity.
- High-Speed Motors and Spindles: Ideal for electric vehicle motors, dental handpieces, and small turbine spindles that benefit from the hybrid ceramic advantages.
- Advanced Aerospace & Defense Systems: Applied in gyroscopes, radar systems, and other instrumentation requiring super-precision and reliability.
