71811 CDGB/P4
71800 Series Super Precision Angular Contact Ball Bearings
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71811 CDGB/P4 Bearing Product Overview & Core Advantages
The 71811 CDGB/P4 is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4 tolerance class, this bearing delivers superior running accuracy and dimensional stability. Its 15° contact angle provides optimal performance for combined loads, effectively handling both radial and axial forces in one direction. The phenolic cage and light preload (Class B) contribute to smooth operation at high speeds up to 34,000 rpm, making it ideal for precision spindles and other demanding applications.
71811 CDGB/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 71811 | Basic bearing designation with 55mm bore diameter | Standardized sizing for easy replacement and selection |
| C | 15° contact angle design | Optimized for combined radial and axial load capacity |
| D | Light preload (Class B) | Enhanced rigidity and reduced vibration during operation |
| G | Universal Matchable (SU) bearing | Can be mounted in sets without selective matching |
| B | 72mm outside diameter, 9mm width | Compact design for space-constrained applications |
| P4 | High precision tolerance class | Superior running accuracy and dimensional stability |
71811 CDGB/P4 Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4 tolerance standards with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional dimensional accuracy and consistent performance in precision applications.
Optimized Load Capacity: The 15° contact angle design enables efficient handling of combined radial and axial loads, with dynamic load rating of 2,272 lbf and static load rating of 2,430 lbf, providing reliable performance under demanding operating conditions.
Superior High-Speed Performance: The phenolic resin cage and light preload configuration allow for limiting speeds of 34,000 rpm, while the 29 chrome steel balls (4.762mm diameter) ensure smooth rotation and reduced vibration at high velocities.
Universal Matching Capability: Designed as Universal Matchable (SU) bearings, these can be mounted in sets of three without selective matching, simplifying installation and ensuring consistent preload characteristics in multi-bearing arrangements.
71811 CDGB/P4 Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles requiring P4 accuracy
- Precision Instrumentation: Measuring equipment and laboratory instruments demanding exceptional rotational accuracy
- High-Speed Motors: Spindle motors and high-frequency applications where 34,000 rpm capability is essential
- Medical Equipment: Dental handpieces and surgical tools requiring reliable high-speed operation
- Aerospace Components: Guidance systems and precision mechanisms where dimensional stability is critical
