S71928 CD/P4ADBC
Sealed Super Precision Angular Contact Ball Bearings
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S71928 CD/P4ADBC Bearing Product Overview & Core Advantages
The S71928 CD/P4ADBC is a precision duplex back-to-back angular contact ball bearing designed for applications requiring exceptional rigidity and running accuracy. This matched bearing set features a P4A tolerance class and a moderate preload (Class C), making it ideal for high-speed spindles and other precision machinery. Its duplex back-to-back arrangement provides superior stiffness and the ability to withstand combined radial and axial loads from both directions, ensuring reliable performance in demanding operational conditions.
S71928 CD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Duplex bearing in a Back-to-Back (DB) arrangement. This configuration provides high moment rigidity. |
| P4A | Indicates a high-precision tolerance class with running accuracy requirements stricter than ABEC 7/P4. |
| DBC | Specifies the moderate preload (Class C) applied to the matched set, optimizing rigidity and minimizing deflection under load. |
S71928 CD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and supports heavy combined radial and axial loads.
- Precision Performance: Manufactured to P4A tolerance class with a 15° contact angle, this bearing ensures minimal runout and high rotational accuracy for precision applications.
- Optimized High-Speed Operation: The lightweight phenolic resin cage and grease lubrication contribute to stable performance at high rotational speeds, with a limiting speed of 11,000 rpm.
- Durability and Reliability: Constructed from chrome steel for both rings and balls, the bearing offers high fatigue life and wear resistance. The sealed design retains lubricant and protects against contamination.
S71928 CD/P4ADBC Bearing Typical Application Areas
The S71928 CD/P4ADBC is engineered for high-performance applications where precision, speed, and rigidity are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Internal and external grinding machines.
- High-Frequency Motors: Spindles for PCB drilling and other high-RPM applications.
- Medical Equipment: High-speed rotors in dental handpieces and centrifuges.
- Robotics: Precision joints and actuators requiring high rigidity.
