71934 ACD/P4ADGA
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 71934 ACD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in pre-lubricated pairs, it delivers superior performance in handling combined radial and axial loads simultaneously. Manufactured to P4A tolerance class, this bearing offers extremely tight dimensional control for high-precision machinery. Its extra light preload (Class A) ensures minimal deflection under operational stresses, making it ideal for high-speed, high-rigidity applications where positional accuracy is critical.
71934 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Implication |
|---|---|---|
| 71934 | Basic bearing designation | Defines standard dimensions: 170mm bore, 230mm OD, 56mm width |
| AC | 25° contact angle | Optimized for axial load capacity while maintaining radial performance |
| D | High structural rigidity | Enhanced stiffness for precision applications |
| P4A | High precision tolerance class | Superior running accuracy and dimensional stability |
| DGA | Universal matchable pair, pre-lubricated | Ready-to-install bearing set with optimized preload |
Structural Features and Performance Benefits
High Rigidity Design: The 25° contact angle and optimized internal geometry provide exceptional stiffness characteristics, reducing deflection under heavy combined loads. This makes the bearing particularly suitable for applications requiring minimal deformation.
Superior Load Capacity: With a dynamic load rating of 45,675 lbf and static load rating of 72,000 lbf, this bearing handles significant radial and axial forces simultaneously. The angular contact design efficiently manages thrust loads in one direction while maintaining radial load capacity.
Precision Performance: Manufactured to P4A tolerance standards with bore and outside diameter tolerances of -0.004mm to 0, this bearing ensures exceptional running accuracy. The phenolic cage material provides excellent dimensional stability and reduced friction at high speeds.
High-Speed Capability: With a limiting speed of 16,250 rpm, the bearing is engineered for demanding high-speed applications. The optimized internal clearance and cage design contribute to smooth operation at elevated rotational speeds.
71934 ACD/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and milling applications requiring exceptional accuracy and rigidity
- Precision Gearboxes: Industrial transmission systems demanding high rotational accuracy and load capacity
- High-Speed Motors: Electric motors and generators operating at elevated speeds with combined loading conditions
- Aerospace Systems: Aircraft components and auxiliary systems requiring reliable performance under extreme conditions
- Medical Equipment: High-precision medical devices and diagnostic equipment where accuracy and reliability are critical
- Robotics and Automation: Industrial robots, CNC equipment, and automated manufacturing systems
