S71911 ACD/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
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S71911 ACD/P4A Bearing Product Overview & Core Advantages
The S71911 ACD/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior rigidity. Operating under the stringent P4 (ABEC-7) tolerance class, it is designed to accommodate combined loads, primarily handling thrust loads in one direction while also supporting significant radial loads. Its compact design, featuring a 55 mm bore and a 13 mm width, makes it an ideal solution for space-constrained, high-performance assemblies. The bearing is preloaded and comes pre-lubricated, ensuring immediate operational readiness and contributing to its high-speed capability with a limiting speed of 15,000 rpm.
S71911 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Stainless Steel (Note: Specification indicates Chrome Steel, but 'S' prefix often denotes high-grade bearing steel for precision applications). |
| 7 | Angular Contact Bearing design with a 25° contact angle. |
| 1911 | Standardized size code for a 55mm bore, 80mm OD, and 13mm width. |
| ACD | Angular Contact Design optimized for high-speed operation and high rigidity. |
| P4A | Indicates a P4 (ABEC-7) tolerance class with specific running accuracy requirements, signifying a precision bearing. |
S71911 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class with a 25° contact angle, this bearing provides exceptional running accuracy and stiffness, which is critical for minimizing deflection in high-speed spindles.
- Optimized Load Capacity: The single-row design is engineered to handle significant combined loads, with a dynamic load rating of 4095 lbf and a static load rating of 3082 lbf, making it suitable for demanding applications.
- Superior High-Speed Performance: The combination of a lightweight phenolic resin cage, a high-grade steel construction, and optimized internal geometry enables a high limiting speed of 15,000 rpm.
- Sealed and Lubricated for Longevity: As a sealed bearing that is pre-lubricated, it is protected from contamination and is ready for immediate use, offering a maintenance-free solution within its specified temperature range of -30° to 110 °C.
S71911 ACD/P4A Bearing Typical Application Areas
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Equipment
- Robotic Drives and Actuators
- Medical and Dental Equipment
- Aerospace Control Systems
