71922 ACD/P4ADT
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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Product Overview and Core Advantages
The 71922 ACD/P4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. This duplex tandem arrangement bearing set features a P4A tolerance class for superior dimensional precision and rotational accuracy. Engineered to handle combined loads with high rigidity, this bearing configuration delivers optimal performance in high-speed precision systems. The phenolic cage and chrome steel construction ensure stable operation across a wide temperature range from -30°C to 110°C.
Model Code Detailed Explanation
| Code Segment | Technical Meaning |
| 71922 | Basic bearing designation with 110mm bore, 150mm OD, 40mm width |
| AC | Angular Contact design with 25° contact angle |
| D | Duplex arrangement |
| P4A | High precision tolerance class with enhanced running accuracy |
| DT | Tandem mounting arrangement for increased axial load capacity |
Structural Features and Performance Benefits
High Rigidity and Load Capacity: The duplex tandem arrangement provides exceptional stiffness and can handle significant combined radial and axial loads in one direction. The 25° contact angle optimizes axial load carrying capability while maintaining good radial load performance.
Precision Performance: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, making it ideal for high-precision applications. The tight dimensional tolerances (bore: -0.004mm to 0, OD: -0.004mm to 0) guarantee consistent performance and easy installation.
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio and operates effectively at high speeds up to 10,000 rpm. The optimized ball quantity (28 balls) and ball diameter (12.7mm) balance load capacity and speed performance.
Enhanced Durability: Constructed from chrome steel for both rings and balls, this bearing offers superior wear resistance and fatigue life. The pre-lubricated design ensures immediate operational readiness and reliable performance.
71922 ACD/P4ADT Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding machine spindles requiring exceptional accuracy and rigidity
- High-Speed Spindles: CNC machining centers, PCB drilling machines, and other high-speed rotational equipment
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus demanding minimal vibration
- Robotics and Automation: Industrial robot arms, precision positioning systems, and automated manufacturing equipment
- Aerospace Components: Guidance systems, aircraft instrumentation, and other critical aerospace applications
