S71914 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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S71914 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The S71914 ACEGA/HCP4A is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. As a single bearing with a 25° contact angle and P4A tolerance class, it delivers exceptional running accuracy. Its core advantage lies in its ability to handle combined radial and axial loads simultaneously, making it ideal for spindles requiring extreme precision, low vibration, and high operational reliability. The use of ceramic balls and a phenolic cage further enhances its performance in high-speed environments.
Model Code Breakdown
| S71914 | Basic series designation for a super-precision, 70mm bore angular contact ball bearing. |
| AC | Angular Contact design with a 25° contact angle. |
| EGA | Indicates the bearing is universally matchable (SU). Two bearings can be paired in a back-to-back (DB) or face-to-face (DF) arrangement to optimize rigidity and load capacity. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls (Si3N4) for reduced weight, lower friction, and superior high-speed performance. |
| P4A | The tolerance class, denoting ultra-precision dimensions and running accuracy superior to ABEC 7/ISO P4. |
S71914 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
High-Speed & High-Rigidity Design: The combination of a lightweight phenolic resin cage and hybrid ceramic balls significantly reduces centrifugal forces, enabling a high limiting speed of 28,000 rpm. The optimized internal geometry provides high system rigidity.
Exceptional Load Capacity: The 25° contact angle is engineered to support significant combined loads, offering a dynamic load rating of 4680 lbf and a static load rating of 3442 lbf.
Ultra-Precision Performance: Manufactured to P4A tolerance class with a universal matching (SU) designation, this bearing ensures minimal runout and consistent performance when mounted in pairs, which is critical for applications like machine tool spindles.
Pre-Lubricated & Sealed: The bearing comes sealed and pre-lubricated with high-performance grease, protecting against contamination and providing reliable operation within a temperature range of -30°C to 110°C.
S71914 ACEGA/HCP4A Bearing Typical Application Areas
The S71914 ACEGA/HCP4A is specified for high-performance machinery where precision and speed are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: High-frequency spindles for PCB drilling and precision measuring equipment.
- High-Speed Motors: Spindles for electric motors and turbo-molecular pumps.
- Aerospace & Defense Systems: Gyroscopes and other critical navigation or control systems.
