7215 ACD/P4ADFA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7215 ACD/P4ADFA Bearing Product Overview & Core Advantages
The 7215 ACD/P4ADFA is a duplex face-to-face (DF) matched pair of precision angular contact ball bearings manufactured to P4A tolerance class. This configuration is engineered to provide exceptional running accuracy and high system rigidity. The bearings are pre-lubricated and feature an open seal design, making them ideal for applications requiring high-speed operation and the capacity to handle combined loads, including significant thrust loads in both directions. The extra light preload (Class A) ensures smooth, low-vibration performance right from installation, making it a superior choice for high-reliability and high-precision machinery.
7215 ACD/P4ADFA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7215 | Basic bearing designation: 75 mm bore, 130 mm OD, 25 mm single width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates the bearing is part of a Duplex (matched pair) set. |
| P4A | Specifies a high precision tolerance class for enhanced running accuracy. |
| DF | Matched arrangement: Face-to-Face (DF). This configuration increases system rigidity and is excellent for withstanding overturning moments. |
| A | Specifies the preload level: Extra light (Class A). |
7215 ACD/P4ADFA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex face-to-face (DF) arrangement of two angular contact bearings creates a highly rigid bearing system capable of supporting substantial combined radial and axial loads from both directions. This is critical for applications requiring minimal shaft deflection.
- Precision Performance: Manufactured to P4A tolerance class, this bearing ensures extremely low runout and high rotational accuracy, which is essential for precision spindles.
- High-Speed Capability: The lightweight and robust phenolic cage minimizes centrifugal forces, contributing to stable operation at high speeds, with a limiting speed of 36,000 rpm.
- Optimized Internal Geometry: With a 25° contact angle and precision-ground chrome steel components, the bearing delivers a high dynamic load rating of 24,975 lbf and reliable, long-lasting performance.
7215 ACD/P4ADFA Bearing Typical Application Areas
The 7215 ACD/P4ADFA is designed for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: For PCB drilling, engraving, and other high-accuracy machining.
- High-Frequency Motors and Spindle Drives.
- Industrial Pumps and Compressors requiring high shaft stability.
