S7211 ACD/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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S7211 ACD/P4A Bearing Product Overview & Core Advantages
The S7211 ACD/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, this bearing is optimized to handle combined loads—simultaneous radial and axial forces—with superior performance. Its single-row design with a 25° contact angle provides high rigidity and operational stability, making it an ideal choice for high-speed spindles and precision machinery where reliability is paramount. The bearing comes pre-lubricated and is capable of operating within a wide temperature range, ensuring consistent performance in various industrial environments.
S7211 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
- S7211: Basic bearing series designation
- ACD: Angular Contact design with a 25° contact angle
- P4A: Indicates a P4 (ABEC-7) tolerance class with specific internal running accuracy enhancements
S7211 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: Manufactured to P4 tolerance class with a phenolic resin cage, this bearing ensures minimal vibration and high running accuracy, essential for precision applications.
- Superior Load Capacity: The 25° contact angle and optimized internal geometry enable it to handle significant combined radial and axial loads (Dynamic: 11,858 lbf, Static: 9,112 lbf).
- High-Speed Capability: The lightweight phenolic cage and precision-ground chrome steel components contribute to a high limiting speed of 13,000 rpm.
- Optimized for Performance: The bearing is pre-lubricated and features a sealed design, protecting against contamination and ensuring consistent performance across its operating temperature range of -30°C to 110°C.
S7211 ACD/P4A Bearing Typical Application Areas
- Machine Tool Spindles
- High-Speed Machining Centers
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotic Drives and Precision Instrumentation
