71928 ACD/P4ADGC
71900 Series Super Precision Angular Contact Ball Bearings
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71928 ACD/P4ADGC Bearing Product Overview & Core Advantages
The 71928 ACD/P4ADGC is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This universal matchable (SU) bearing features a 25° contact angle and moderate preload (Class C), enabling it to handle combined radial and axial loads simultaneously. Manufactured to P4A tolerance class with phenolic cage construction, it delivers superior high-speed performance up to 11,000 rpm while maintaining dimensional stability across a wide temperature range (-30°C to 110°C).
71928 ACD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning | Performance Benefit |
|---|---|---|
| ACD | 25° Contact Angle, Universal Matchable Design | Optimized for combined loads and universal mounting arrangements |
| P4A | High Precision Tolerance Class | Superior running accuracy and dimensional stability |
| DGC | Phenolic Cage Material | Enhanced high-speed capability and reduced friction |
71928 ACD/P4ADGC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The optimized 25° contact angle and universal matching capability provide exceptional stiffness, supporting radial dynamic load ratings of 32,850 lbf and static load ratings of 49,500 lbf. The bearing's design effectively manages both radial and axial loads in any combination.
Precision Engineering: Manufactured to P4A tolerance standards with tight dimensional controls (bore tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for precision applications.
High-Speed Performance: The phenolic cage and optimized internal geometry enable reliable operation at limiting speeds of 11,000 rpm, making it ideal for high-speed spindle applications.
Thermal Stability: Chrome steel construction maintains dimensional integrity across the operating temperature range from -30°C to 110°C, ensuring consistent performance in varying thermal conditions.
71928 ACD/P4ADGC Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and grinding spindles
- High-Speed Spindles - CNC machining equipment and precision grinding machines
- Precision Instrumentation - Measuring equipment and optical systems
- Aerospace Components - Guidance systems and precision actuators
- Medical Equipment - High-speed dental handpieces and surgical tools
- Robotics - Precision joints and high-accuracy positioning systems
