71920 ACD/P4AQGB
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71920 ACD/P4AQGB Bearing Product Overview & Core Advantages
The 71920 ACD/P4AQGB is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. This universal matchable (SU) bearing features a 25° contact angle and light preload (Class B), enabling it to handle combined radial and axial loads simultaneously. Manufactured to P4A tolerance class, it delivers superior running accuracy and rotational precision. Its phenolic cage and optimized internal geometry contribute to excellent high-speed performance, making it ideal for precision spindles and other high-rotation equipment.
71920 ACD/P4AQGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71920 | Basic bearing designation indicating size series and bore diameter |
| ACD | 25° contact angle design with optimized internal geometry |
| P4A | High precision tolerance class with enhanced dimensional and running accuracy |
| QGB | Special grouping code indicating universal matching capability (SU designation) |
71920 ACD/P4AQGB Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance standards with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional dimensional stability and running accuracy for precision applications.
Optimized Load Capacity: The 25° contact angle design provides balanced performance for combined radial and axial loads, with dynamic load rating of 33,975 lbf and static load rating of 56,250 lbf.
Superior High-Speed Performance: The phenolic cage material and precision-ground chrome steel components enable a limiting speed of 15,000 rpm, making it suitable for high-rotation applications.
Universal Matching Capability: Designed as Universal Matchable (SU) bearings, they can be arranged in multiple configurations (back-to-back, face-to-face, or tandem) without requiring selective assembly.
Premium Material Selection: Constructed from chrome steel for both rings and balls, providing excellent wear resistance and durability under demanding operating conditions.
71920 ACD/P4AQGB Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers requiring exceptional accuracy and rigidity
- Precision Robotics: High-speed robotic arms and automation equipment demanding precise motion control
- Aerospace Systems: Critical rotating components in aircraft systems and navigation equipment
- Medical Equipment: High-speed dental handpieces, surgical tools, and diagnostic imaging systems
- Semiconductor Manufacturing: Precision wafer handling equipment and processing machinery
- High-Speed Motors: Spindle motors and high-frequency drive systems requiring minimal vibration
