7211 ACD/P4A
7200 & 7300 Series 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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7211 ACD/P4A Bearing Product Overview & Core Advantages
The 7211 ACD/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to accommodate combined loads (simultaneous radial and axial loads), this bearing features a 25° contact angle optimized for handling substantial axial loads in one direction. Manufactured to P4 (ABEC-7) tolerance class, it delivers superior running accuracy and is preloaded for enhanced system stiffness and minimal deflection under operational forces. Its compact design and high limiting speed make it ideal for demanding, high-speed machinery.
7211 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Designates a 25° contact angle and optimized internal geometry for high axial load capacity and rigidity. |
| P4A | Indicates a P4 (ABEC-7) tolerance class and specific running accuracy requirements for the shaft and housing seats, ensuring superior precision. |
7211 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Preload: The bearing is supplied with a preload, which eliminates internal clearance. This significantly increases system stiffness, improves rotational accuracy, and reduces vibration and noise under load.
- Superior Load Capacity: The 25° contact angle and robust internal design provide excellent axial load carrying capacity in one direction while maintaining strong radial load performance, making it suitable for combined loads.
- High-Speed Performance: The lightweight, durable phenolic resin cage ensures stable operation and guides the balls effectively, contributing to the bearing's high limiting speed of 20,000 rpm.
- Precision & Longevity: Manufactured from high-grade chrome steel and held to P4 precision tolerances, this bearing offers extended service life, consistent performance, and high reliability in precision applications.
7211 ACD/P4A Bearing Typical Application Areas
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotic Arms and Precision Gearboxes
