71808 ACDGA/P4
71800 Series Super Precision Angular Contact Ball Bearings
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71808 ACDGA/P4 Bearing Product Overview & Core Advantages
The 71808 ACDGA/P4 is a single-row angular contact ball bearing designed for ultra-high precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4 tolerance class, this bearing delivers superior running accuracy and dimensional stability. Its key advantage lies in its ability to support combined loads (radial and axial loads simultaneously) efficiently, making it ideal for high-speed spindles and precision machinery. The extra light preload (Class A) ensures minimal deflection and smooth operation right from installation, while the phenolic resin cage contributes to its high-speed capability and reduced friction.
71808 ACDGA/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71808 | Basic bearing series and size designation (40mm bore, 52mm OD, 7mm width) |
| AC | Angular Contact design with a 25° contact angle |
| DGA | Universal Matchable bearing, designed to be mounted in pairs (Duplex arrangement) |
| P4 | High precision tolerance class for superior running accuracy |
71808 ACDGA/P4 Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The P4 tolerance class and extra light preload provide exceptional dimensional stability and minimize runout, crucial for applications demanding high positional accuracy.
- Superior Load Capacity: The 25° contact angle is optimized to handle significant axial loads in one direction while supporting radial loads, making it suitable for combined loading conditions.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, enabling a high limiting speed of 56,000 rpm. This material also offers excellent performance under lubrication.
- Universal Matching Design: As a Universal Matchable (SU) bearing, the 71808 ACDGA/P4 can be universally paired with another identical bearing in various preloaded configurations (e.g., back-to-back, face-to-face) to achieve the required system rigidity and load capacity.
71808 ACDGA/P4 Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Joint and arm actuators requiring high positional accuracy.
- High-Frequency Spindles: PCB drilling and routing machines.
- Medical Equipment: Dental handpieces and high-speed surgical tools.
- Aerospace & Defense: Gyroscopes, radar systems, and navigation instruments.
