71911 ACE/HCPA9A
Hybrid Ceramic Super Precision Bearings
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71911 ACE/HCPA9A Bearing Product Overview & Core Advantages
The 71911 ACE/HCPA9A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single bearing features a 25° contact angle and is supplied with a preload, making it ideal for arrangements requiring high system rigidity and precise rotational accuracy. Its combination of a chrome steel ring, ceramic balls, and a phenolic cage delivers superior high-speed performance, reduced friction, and extended service life. This bearing is designed to handle combined radial and axial loads simultaneously, offering a compact and reliable solution for high-performance machinery.
71911 ACE/HCPA9A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71911 | Basic bearing designation, indicating the series and size. |
| ACE | Signifies a 25° contact angle and that the bearing is preloaded. |
| HC | Indicates the use of Hybrid Ceramic balls (ceramic balls with steel rings). |
| PA9A | Denotes a high-precision tolerance class, ensuring extremely tight dimensional and running accuracy. |
71911 ACE/HCPA9A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of steel rings and ceramic balls significantly reduces friction and heat generation, enabling higher limiting speeds and providing electrical insulation. This construction also offers superior resistance to wear and a longer operational lifespan.
High-Speed Phenolic Cage: The lightweight and robust phenolic cage is ideal for high-speed applications, offering excellent dimensional stability and low friction under high centrifugal forces.
Precision and Rigidity: The 25° contact angle and applied preload work in unison to provide high axial rigidity and precise shaft positioning, minimizing deflection under load and ensuring accurate rotational performance.
Optimized Load Capacity: Engineered to support significant combined loads (radial and axial), this bearing is rated for a dynamic load of 3330 lbf and a static load of 2250 lbf.
71911 ACE/HCPA9A Bearing Typical Application Areas
The 71911 ACE/HCPA9A is ideally suited for high-performance machinery where speed, precision, and rigidity are critical. Key application areas include:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Aerospace Control Systems
- Medical and Dental Equipment
