71808 ACDGB/P4
71800 Series Super Precision Angular Contact Ball Bearings
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71808 ACDGB/P4 Bearing Product Overview & Core Advantages
The 71808 ACDGB/P4 is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Operating under P4 tolerance class, this metric bearing delivers superior dimensional stability and running accuracy. Its 25° contact angle is optimized to handle significant axial loads in one direction while supporting substantial radial loads. The light preload (Class B) ensures minimal deflection under operational stresses, making it ideal for applications demanding high positional accuracy and smooth operation at limiting speeds up to 56,000 rpm. Manufactured from chrome steel with a phenolic cage, it offers reliable performance across a wide temperature range from -30°C to 110°C.
Model Code Detailed Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71808 | Basic bearing series designation |
| AC | Angular Contact design with 25° contact angle |
| D | High ball count and optimized internal geometry |
| GB | Universal Matchable (SU) - bearings can be paired in any combination |
| /P4 | High precision tolerance class for exceptional running accuracy |
71808 ACDGB/P4 Bearing Structural Features & Performance Benefits
Precision Engineering: The P4 tolerance class ensures minimal dimensional variation, providing consistent performance in high-precision applications. The bore diameter tolerance of -0.004mm to 0 and outside diameter tolerance of -0.004mm to 0 guarantee precise fit and optimal performance.
Optimized Load Capacity: With a 25° contact angle and 29 balls of 3.175mm diameter, this bearing delivers excellent radial dynamic load rating of 1010 lbf and radial static load rating of 1024 lbf. The design effectively handles combined loads while maintaining stability.
High-Speed Capability: The phenolic cage provides excellent strength-to-weight ratio, contributing to the bearing's ability to operate at limiting speeds of 56,000 rpm. The cage design minimizes friction and allows for efficient lubrication distribution.
Universal Matching Design: As a Universal Matchable (SU) bearing, it can be paired with identical bearings in any combination, simplifying installation and ensuring optimal preload conditions in matched arrangements.
71808 ACDGB/P4 Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and grinding spindles
- Precision Instrumentation - Measuring equipment and laboratory instruments
- High-Speed Motors - Servo motors and spindle drives requiring precise rotation
- Medical Equipment - Dental handpieces and surgical tool rotors
- Aerospace Systems - Guidance systems and precision actuators
- Robotics - Joint actuators and precision positioning mechanisms
