71808 CD/P4DFA
71800 Series Super Precision Angular Contact Ball Bearings
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71808 CD/P4DFA Bearing Product Overview & Core Advantages
The 71808 CD/P4DFA is a super-precision angular contact ball bearing designed for applications demanding the highest levels of rotational accuracy and rigidity. As a duplex face-to-face (DF) matched set, this bearing configuration is preloaded to deliver exceptional system stability and is optimized to handle combined loads—simultaneous radial and axial forces. Manufactured to P4 tolerance class, it guarantees minimal runout and consistent high-speed performance, making it an ideal choice for high-precision, high-reliability spindles and machinery.
71808 CD/P4DFA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71808 | Basic bearing designation indicating a 40 mm bore, 52 mm OD, and 14 mm width. |
| C | 15° contact angle, optimized for high-speed applications and axial load capacity. |
| D | Indicates the bearing is part of a duplex pair. |
| P4 | Denotes a super-precision tolerance class for extremely tight dimensional and running accuracy. |
| DF | Duplex Face-to-Face arrangement. This configuration increases system rigidity and is less sensitive to misalignment. |
| A | Specifies an Extra Light preload for minimal friction and optimal high-speed operation. |
71808 CD/P4DFA Bearing Structural Features & Performance Benefits
- High Rigidity & System Stability: The duplex face-to-face (DF) matched set with extra light preload creates a highly rigid bearing system that effectively resists operational deflections, ensuring precise shaft positioning and improved machining quality.
- Superior Load Capacity: The 15° contact angle and duplex design enable the bearing to handle significant combined radial and axial loads from both directions, making it versatile for complex loading conditions.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the precision-ground chrome steel components and P4 tolerances contribute to smooth operation and a high limiting speed of 56,000 rpm.
- Precision Engineering: Manufactured to P4 tolerance class with tight bore, OD, and width tolerances, this bearing ensures minimal vibration and exceptional running accuracy for the most demanding applications.
71808 CD/P4DFA Bearing Typical Application Areas
The 71808 CD/P4DFA is engineered for high-performance machinery where precision and speed are critical. Key applications include:
- High-Frequency CNC Spindles for milling, grinding, and drilling
- Precision Machine Tool Mandrels
- High-Speed Robotic Drives and actuators
- Advanced Medical Equipment spindles
- Aerospace Test & Measurement apparatus
