S71911 CD/P4ADGB
Sealed Super Precision Angular Contact Ball Bearings
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S71911 CD/P4ADGB Bearing Product Overview & Core Advantages
The S71911 CD/P4ADGB is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Operating under a P4A tolerance class, it delivers superior running accuracy for high-speed spindles and precision machinery. Its universal matchable (SU) design allows two bearings to be mounted in any combination (face-to-face or back-to-back) to achieve optimal preload and system stiffness. This bearing is engineered to handle combined loads efficiently, supporting significant radial loads and axial loads in one direction simultaneously.
S71911 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings. |
| 1911 | Standard size designation (Bore: 55mm, OD: 80mm, Width: 26mm). |
| C | Specifies a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| D | Indicates a light preload (Class B), enhancing rigidity and minimizing deflection under load. |
| P4A | Denotes an ultra-precision tolerance class with enhanced running accuracy requirements. |
| DGB | Suffix combination indicating universal matchable (SU) bearings supplied as a matched set of 2. |
S71911 CD/P4ADGB Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The phenolic resin cage ensures dimensional stability at high speeds and reduced friction. Combined with the P4A tolerance class and light preload, this construction provides exceptional rotational accuracy and system stiffness, critical for machining precision.
Optimized Load Capacity: With a 15° contact angle and robust construction, this bearing is engineered to handle combined radial and axial loads effectively, making it suitable for complex load conditions.
Superior High-Speed Performance: The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 34,000 rpm, enabling reliable operation in demanding high-speed applications.
Sealed and Lubricated for Life: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is designed for long-term, maintenance-free operation within its specified temperature range.
S71911 CD/P4ADGB Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Instrumentation: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Speed Drives: Electric motor spindles, high-frequency routers, and dental handpieces.
- Robotics: Precision joints and actuators requiring high accuracy and rigidity.
