7208 CD/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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7208 CD/P4A Bearing Product Overview & Core Advantages
The 7208 CD/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to simultaneously handle combined radial and axial loads, this single bearing features a 15° contact angle and is supplied with a preload for enhanced system stiffness and precise shaft positioning. Manufactured to P4 (ABEC-7) tolerance class, it is an ideal solution for high-speed spindles and other precision machinery where minimal runout and superior performance are critical.
7208 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7208 | Basic bearing series, indicating a 40 mm bore, 80 mm OD, and 18 mm width. |
| C | Designates a 15° contact angle. |
| D | Indicates the bearing is supplied with a preload for high rigidity. |
| P4 | Specifies the high-precision tolerance class (equivalent to ABEC-7). |
| A | Denotes that the bearing's internal geometry has been optimized for high-speed operation. |
7208 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The angular contact design and applied preload work in concert to provide exceptional system stiffness, minimizing deflection under load and ensuring precise shaft guidance. This is critical for applications requiring high positional accuracy.
- Superior Load Capacity: The 15° contact angle is optimized to handle significant combined loads, making it capable of supporting both radial forces and thrust loads in one direction efficiently.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel components and optimized internal geometry contribute to a high limiting speed of 30,000 rpm.
- Pre-Lubricated for Immediate Use: The bearing is factory-lubricated, ensuring optimal performance from the start of operation within its specified temperature range of -30°C to 110°C.
7208 CD/P4A Bearing Typical Application Areas
The 7208 CD/P4A is ideally suited for high-performance applications across various industries, including:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Robotics: High-accuracy joints and arm assemblies.
- High-Frequency Motors and Spindles: Where low vibration and high rotational accuracy are paramount.
- Medical and Dental Equipment: High-speed handpieces and imaging devices.
- Aerospace and Defense Systems: Gyroscopes, radar equipment, and other critical instrumentation.
