71820 CDGB/P4
71800 Series Super Precision Angular Contact Ball Bearings
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71820 CDGB/P4 Bearing Product Overview & Core Advantages
The 71820 CDGB/P4 is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Operating under P4 tolerance class, this bearing delivers superior dimensional stability and runout control. Its 15° contact angle and light preload (Class B) configuration make it ideal for applications demanding high-speed operation while maintaining precise axial and radial positioning. The phenolic cage and universal matching capability (SU) enable optimal performance in matched arrangements.
71820 CDGB/P4 Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71820 | Basic bearing designation indicating size series and bore diameter |
| C | 15° contact angle design |
| D | Light preload (Class B) |
| G | Universal matching bearing (SU designation) |
| B | 40° contact angle (modified from standard) |
| /P4 | High-precision tolerance class |
71820 CDGB/P4 Bearing Structural Features & Performance Benefits
High Precision & Rigidity: Manufactured to P4 tolerance class with tight dimensional controls (bore: -0.004mm to 0, OD: -0.004mm to 0) ensuring minimal runout and vibration. The 15° contact angle provides optimal balance between radial and axial load capacity.
High-Speed Capability: The phenolic cage offers excellent strength-to-weight ratio, reducing centrifugal forces and enabling operation at 15,000 rpm limiting speed. The light preload configuration minimizes friction while maintaining shaft stability.
Superior Load Capacity: With 34 chrome steel balls of 7.144 mm diameter, this bearing delivers dynamic load rating of 5062 lbf and static load rating of 6525 lbf, providing reliable performance under combined loads.
Universal Matching: Designed as Universal Matchable (SU) bearings, they can be paired in various configurations (back-to-back, face-to-face, or tandem) to meet specific application requirements for stiffness and load distribution.
71820 CDGB/P4 Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and grinding machines
- Precision Instrumentation - Measuring equipment and optical devices
- High-Speed Motors - Servo motors and spindle drives
- Aerospace Components - Guidance systems and actuator mechanisms
- Medical Equipment - Dental handpieces and surgical tools
- Robotics - Precision joints and positioning systems
