S71922 ACD/P4ADBB
Sealed Super Precision Angular Contact Ball Bearings
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S71922 ACD/P4ADBB Bearing Product Overview & Core Advantages
The S71922 ACD/P4ADBB is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. This matched set features a Back-to-Back (DB) arrangement and a P4A super-precision tolerance class, making it ideal for high-speed spindles and other precision machinery. Its primary advantage lies in its ability to support combined loads (radial and axial) simultaneously while providing high running accuracy and system stability. The light preload (Class B) ensures minimal deflection under operational stresses, contributing to superior performance in high-rigidity applications.
S71922 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a high-precision angular contact ball bearing series. |
| 1922 | Specifies the bearing dimensions: 110 mm bore, 150 mm outside diameter, 40 mm width. |
| ACD | Angular Contact Design with a 25° contact angle. |
| P4A | Denotes a super-precision tolerance class, with enhanced running accuracy requirements. |
| DB | Signifies the bearings are supplied as a Duplex Back-to-Back matched set. |
S71922 ACD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity and System Stability: The Back-to-Back (DB) duplex arrangement provides a wide effective spread of load-bearing points, significantly increasing the moment rigidity of the bearing pair. This configuration is exceptionally resistant to overturning moments, making it a cornerstone for high-rigidity spindle designs.
Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 21,510 lbf, this bearing is engineered to handle significant combined radial and axial loads. The matched set ensures optimized load distribution between the two bearings.
High-Speed Performance: The use of a lightweight, durable phenolic cage reduces centrifugal forces, allowing for a high limiting speed of 10,000 rpm. The precision grinding of components to P4A standards minimizes vibration and heat generation at high speeds.
Sealed and Pre-Lubricated: As a sealed bearing, it is protected from contamination and is pre-lubricated with grease, offering a maintenance-free solution within its specified temperature range of -30°C to 110°C.
S71922 ACD/P4ADBB Bearing Typical Application Areas
The S71922 ACD/P4ADBB is specifically designed for high-performance applications where precision and rigidity are paramount. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications requiring the utmost in rotational accuracy.
- High-Frequency Motors: Spindles for PCB drilling and other high-RPM processes.
- Industrial Robotics: Precision joints and arm articulation systems.
