S71911 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S71911 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The S71911 ACEGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This sealed bearing features a single, universal matchable design with an extra light preload (Class A), making it ideal for high-speed spindles and precision machinery. Its key advantages include the ability to handle combined loads (radial and axial) simultaneously, superior running accuracy from its P4A tolerance class, and reliable operation facilitated by its integrated seals and phenolic cage. The use of ceramic balls further enhances its performance in high-speed and thermally challenging environments.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S | Denotes a bearing from a high-precision series. |
| 71911 | Basic bearing designation (15° contact angle series, 55mm bore, 80mm OD, 13mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| EGA | Sealed on both sides. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls with steel rings. |
| P4A | Indicates a super-precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
S71911 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) reduces centrifugal forces, lowers operating temperature, and extends service life, especially at high speeds (up to 34,000 rpm).
Precision & Rigidity: Manufactured to P4A tolerance class with an extra light preload, this bearing provides exceptional running accuracy and system rigidity, minimizing deflection under load.
Optimized for Speed: The lightweight phenolic resin cage is engineered for high-speed stability and reduced friction. The 25° contact angle offers an excellent balance between radial and axial load capacity.
Sealed & Lubricated for Life: The integral seals protect against contamination, and the bearing is pre-lubricated with grease suitable for a temperature range of -30°C to 110°C, ensuring long-term, maintenance-free operation.
S71911 ACEGA/HCP4A Bearing Typical Application Areas
This high-precision, high-speed bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices and laboratory equipment.
- High-Speed Motors and Drives: Where low vibration and high accuracy are critical.
- Aerospace & Defense Systems: Gyroscopes, navigation systems, and other critical components.
