S71930 CD/P4ADBA
Sealed Super Precision Angular Contact Ball Bearings
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S71930 CD/P4ADBA Bearing Product Overview & Core Advantages
The S71930 CD/P4ADBA is a precision duplex angular contact ball bearing configured in a back-to-back (DB) arrangement. Engineered for the most demanding applications, this bearing excels at simultaneously handling combined radial and axial loads from both directions. Its P4A super-precision tolerance and extra light preload (Class A) ensure exceptional running accuracy, high system rigidity, and optimal performance in high-speed scenarios, making it ideal for high-reliability, high-precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings. |
| 1930 | Bore diameter: 150 mm, Outside diameter: 210 mm, Width: 56 mm. |
| CD | Indicates a duplex bearing in a back-to-back (DB) arrangement. |
| P4A | Specifies a super-precision tolerance class, exceeding ABEC 7/ISO P4 standards, for superior running accuracy. |
| DB | Confirms the back-to-back duplex mounting of the two bearing units. |
| A | Denotes extra light preload (Class A) for minimal friction and optimal high-speed operation. |
S71930 CD/P4ADBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back design creates a wide, rigid support system that effectively resists overturning moments and accommodates heavy combined loads and bidirectional axial loads.
High-Speed Performance: The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces, reduced friction, and stable operation at the high limiting speed of 11,000 rpm. The optimized internal geometry and 15° contact angle further enhance speed capability.
Precision & Accuracy: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on the bore, outside diameter, and width, this bearing ensures minimal runout and vibration for superior positional accuracy.
Sealed & Pre-Lubricated: The sealed design and factory-applied grease lubrication protect against contamination and provide long-term, maintenance-free operation within the specified temperature range.
S71930 CD/P4ADBA Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications requiring extreme precision, rigidity, and speed, including:
- Machine Tool Spindles (e.g., for milling, grinding, and turning centers)
- High-Frequency Spindles
- Precision Robotics and Automation Equipment
- High-Speed Pumps and Compressors
- Advanced Medical and Laboratory Equipment
