S71917 ACE/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S71917 ACE/P4A Bearing Product Overview & Core Advantages
The S71917 ACE/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. As a single-row bearing with a 25° contact angle, it is engineered to support high combined loads, accommodating significant axial loads in one direction alongside radial loads. Its P4 (ABEC-7) tolerance class ensures superior running accuracy, making it ideal for high-speed spindles and other precision machinery. The bearing comes preloaded and lubricated from the factory, providing immediate, reliable performance and simplifying installation.
S71917 ACE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71917 | Basic bearing designation, indicating a metric, high-precision angular contact ball bearing with an 85mm bore, 120mm OD, and 18mm width. |
| ACE | Internal design code specifying a 25° contact angle and optimized internal geometry for high-speed operation and rigidity. |
| P4A | Indicates the tolerance class P4 (ABEC-7) and that the bearing is supplied with a specific preload for immediate high-rigidity performance. |
S71917 ACE/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class with a phenolic resin cage, this bearing offers exceptional dimensional stability and low vibration, which is critical for maintaining precision at high rotational speeds.
- Superior Load Capacity: The 25° contact angle and robust chrome steel construction enable it to handle high combined loads effectively, providing reliable support in demanding applications.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the factory-applied lubrication and optimized internal geometry contribute to a high limiting speed of 13,700 rpm.
- Sealed and Lubricated for Long Life: As a sealed and pre-lubricated unit, it is protected from contamination and is ready for use, offering a long service life with minimal maintenance within its specified temperature range of -30° to 110 °C.
S71917 ACE/P4A Bearing Typical Application Areas
The S71917 ACE/P4A is ideally suited for high-performance applications where precision and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles: For CNC machining centers, grinding spindles, and other high-precision metalworking equipment.
- High-Speed Motors and Spindles: Used in electric motors, precision spindles, and other machinery requiring high rotational accuracy.
- Precision Instrumentation: Critical components in measuring devices, optical scanners, and medical equipment.
- Robotics and Automation: Joint and arm assemblies in industrial robots where high rigidity and reliability are essential.
