S71911 ACB/P4ADGA
Sealed Super Precision Angular Contact Ball Bearings
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S71911 ACB/P4ADGA Bearing Product Overview & Core Advantages
The S71911 ACB/P4ADGA is a super-precision double row angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. Engineered to accommodate combined radial and axial loads simultaneously from both directions, its compact design offers a high-performance solution in a minimal footprint. Manufactured to P4A tolerance class and featuring a universal matchable (SU) design, this bearing delivers outstanding running accuracy, high stiffness, and reliable operation in high-speed scenarios, making it ideal for advanced industrial machinery.
S71911 ACB/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Super-precision bearing |
| 7 | Angular contact ball bearing |
| 1911 | Bore diameter: 55 mm, Outside diameter: 80 mm, Width: 26 mm |
| ACB | 25° contact angle, universal matchable (SU) design |
| P4A | High precision tolerance class (exceeds ABEC 7) |
| DGA | Sealed on both sides, pre-lubricated with grease |
S71911 ACB/P4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row design provides superior radial and axial stiffness, enabling stable support under combined loads. With a 25° contact angle and optimized internal geometry, it efficiently handles significant bidirectional axial thrust in addition to radial forces.
Super-Precision & High-Speed Performance: Manufactured to P4A tolerance standards, this bearing ensures minimal runout and vibration. The lightweight phenolic resin cage and balanced design contribute to a high limiting speed of 34,000 rpm, making it suitable for high-speed spindles.
Maintenance-Free Operation: Equipped with integral seals (DGA) and pre-lubricated with high-quality grease, the bearing is protected from contamination and offers long-term, maintenance-free service within a wide operating temperature range of -30°C to 110°C.
Universal Matching (SU): The universal matchable design allows any two bearings to be mounted together without the need for selective assembly, simplifying installation and ensuring optimal preload and performance in paired configurations.
S71911 ACB/P4ADGA Bearing Typical Application Areas
The S71911 ACB/P4ADGA is ideally suited for high-precision, high-speed applications across various industries, including:
- Machine Tool Spindles: CNC machining centers, grinding spindles, and high-speed milling heads.
- Precision Instrumentation: Measuring devices, optical scanners, and laboratory equipment.
- High-Speed Motors & Drives: Electric spindles, servo motors, and frequency-controlled drives.
- Robotics & Automation: Robot arm joints, precision rotary tables, and automated handling systems.
