S71928 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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S71928 ACD/HCP4A Bearing Product Overview & Core Advantages
The S71928 ACD/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior rigidity. Operating under the P4 (ABEC-7) tolerance class, it is designed to handle combined loads, efficiently supporting significant radial loads and axial loads in one direction. Its construction, featuring a phenolic cage and ceramic balls, is optimized for high-speed operation up to 7,000 rpm, while the sealed design with factory-applied lubrication ensures long-term, maintenance-free performance in demanding environments.
S71928 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Benefit |
|---|---|---|
| ACD | 25° Contact Angle, High Precision | Optimized for handling high axial loads and providing high rigidity. |
| HC | Hybrid Ceramic (Ceramic Balls) | Reduced weight, lower friction, higher speed capability, and extended service life. |
| P4A | P4 (ABEC-7) Tolerance Class | Guarantees extremely tight dimensional and running accuracy for superior performance. |
S71928 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust single-row design provide excellent resistance to deformation under combined radial and axial loads (Dynamic: 20,340 lbf, Static: 24,750 lbf).
- Superior High-Speed Performance: The combination of a lightweight phenolic resin cage and low-density ceramic (hybrid) balls minimizes centrifugal forces, enabling stable operation at the high limiting speed of 7,000 rpm.
- Precision & Reliability: Manufactured to P4 tolerance class with a bore diameter tolerance of -0.01mm to 0, this bearing ensures precise shaft positioning and smooth, vibration-free running.
- Sealed & Lubricated for Life: The sealed design with pre-applied lubricant protects against contamination and retains lubrication, offering a maintenance-free solution within the specified temperature range of -30°C to 110°C.
S71928 ACD/HCP4A Bearing Typical Application Areas
The S71928 ACD/HCP4A is ideally suited for high-performance machinery requiring precision and speed, including:
- Machine Tool Spindles
- High-Frequency Machining Centers
- Precision Grinding Spindles
- High-Speed Motors and Drives
- Aerospace & Defense Actuators
