S7211 CD/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S7211 CD/P4A Bearing Product Overview & Core Advantages
The S7211 CD/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Engineered to simultaneously handle combined radial and axial loads, this bearing features a preload for enhanced system stiffness and reduced vibration. Manufactured to a P4 (ABEC-7) tolerance class, it guarantees superior running accuracy, making it ideal for high-speed spindles and other precision machinery. Its compact design, sealed construction, and pre-lubrication ensure reliable, long-term performance with minimal maintenance.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S7211 | Basic bearing designation, indicating a metric series, 55mm bore, 100mm OD. |
| CD | Specific internal design and contact angle (15°), optimized for high rigidity and precise load handling. |
| P4A | Indicates a P4 (ABEC-7) tolerance class with specific dimensional and running accuracy requirements for high-precision applications. |
S7211 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The angular contact design with a 15° contact angle and applied preload provides exceptional system stiffness, minimizing deflection under load and ensuring precise shaft positioning. The P4 tolerance class guarantees tight dimensional control for superior running accuracy.
- Superior Load Capacity: Engineered to accommodate combined radial and axial loads simultaneously, making it suitable for complex loading conditions encountered in high-performance machinery.
- Optimized High-Speed Performance: The phenolic resin cage offers low weight and excellent performance at high speeds, contributing to a limiting speed of 14,000 rpm. This is ideal for applications like machine tool spindles.
- Sealed and Lubricated for Long Life: As a sealed bearing, it is protected from contamination. Being pre-lubricated, it is ready for immediate use and offers reliable operation within a temperature range of -30°C to 110°C.
S7211 CD/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for applications where high speed, rigidity, and accuracy are paramount. Key industries and equipment include:
- Machine Tool Spindles (milling, grinding, machining centers)
- High-Frequency Motors and Spindles
- Precision Gearboxes
- Industrial Pumps and Compressors
- Medical and Laboratory Equipment
- Robotics and Automation Systems
