71920 ACDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71920 ACDGB/P4A Bearing Product Overview & Core Advantages
The 71920 ACDGB/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing delivers superior dimensional stability and running accuracy. Its 25° contact angle provides optimal performance for combined loads, effectively handling both radial and axial forces in one direction. The light preload (Class B) ensures minimal deflection under operational stresses, making it ideal for high-speed spindle systems and precision machinery where positional accuracy is critical.
71920 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Significance |
|---|---|---|
| 71920 | Basic bearing series designation | High-precision angular contact bearing series |
| AC | Angular Contact design | 25° contact angle for optimal load distribution |
| DGB | Universal Matchable (SU) bearing | Can be paired in back-to-back or face-to-face arrangements |
| P4A | Tolerance class designation | Super precision tolerance for high-speed applications |
71920 ACDGB/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: The bearing features chrome steel rings and balls with phenolic resin cage, providing excellent dimensional stability and reduced weight for high-speed operation up to 15,000 rpm.
Superior Load Capacity: With a dynamic radial load rating of 12,870 lbf and static radial load rating of 14,175 lbf, the bearing delivers reliable performance under demanding combined load conditions.
High-Speed Capability: The phenolic cage material and optimized internal geometry enable stable operation at high rotational speeds, while the open design allows for efficient lubrication management.
Precision Tolerance: Manufactured to P4A tolerance class with tight dimensional control (bore tolerance: -0.004mm to 0, OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration.
71920 ACDGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles - High-speed machining centers and precision lathes
- Precision Grinding Spindles - Surface and cylindrical grinding applications
- High-Speed Motors - Industrial motors requiring precise rotor positioning
- Medical Equipment - CT scanners and high-speed dental handpieces
- Aerospace Systems - Gyroscopes and navigation equipment
- Robotics - Precision joint mechanisms and servo motors
