71928 ACD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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71928 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 71928 ACD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As part of the Universal Matchable (SU) series, it is optimized to handle combined loads—significant radial and axial loads simultaneously. Its P4A tolerance class ensures superior dimensional and running accuracy, making it ideal for high-speed spindles and other precision machinery. The bearing comes pre-lubricated and is characterized by its high load-carrying capacity and stable performance across a wide temperature range.
71928 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71928 | Basic bearing series and size designation |
| AC | Angular Contact design with a 25° contact angle |
| D | High internal design and optimized geometry |
| P4A | High-Precision Tolerance Class for superior running accuracy |
| DGA | Universal Matchable (SU) designation, indicating the bearing is supplied as one of a pair for duplex mounting |
71928 ACD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design with a 25° contact angle and duplex-ready construction provides high rigidity, enabling the bearing to support substantial combined radial and axial loads.
- Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional tolerances, this bearing ensures minimal runout and vibration, which is critical for high-speed applications.
- Optimized Internal Geometry: Features 29 high-precision chrome steel balls and a phenolic cage, which contributes to lower friction, reduced weight, and superior performance at high speeds (up to 11,000 rpm).
- Universal Matching (SU): This bearing is universally matchable, allowing for flexible duplex mounting arrangements (DB, DF, DT) without the need for selective assembly, simplifying installation and ensuring optimal preload and stiffness.
- Wide Operating Range: Pre-lubricated and capable of operating in a temperature range from -30°C to 110°C, ensuring reliable performance in various environmental conditions.
71928 ACD/P4ADGA Bearing Typical Application Areas
The 71928 ACD/P4ADGA is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles
- High-Speed Machining Centers
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Robotic Drives and Precision Gearboxes
