71948 ACD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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71948 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 71948 ACD/P4ADGA is a super-precision double row angular contact ball bearing engineered for the most demanding applications. Its primary advantage lies in its ability to support combined radial and axial loads simultaneously with exceptional accuracy and rigidity. Manufactured to a P4A tolerance class, this bearing delivers ultra-precise rotational performance. The Universal Matchable (SU) design allows two bearings to be paired in a universal arrangement, simplifying installation and ensuring optimal preload and performance. Its open design, combined with a phenolic cage, is optimized for high-speed operation, making it an ideal choice for machine tool spindles and other high-precision machinery.
71948 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71948 | Basic bearing series and size designation. |
| ACD | Designates a 25° contact angle and a double row configuration, providing high rigidity and thrust capacity. |
| P4A | Indicates the super-precision tolerance class, exceeding ABEC 7/ISO P4 standards for enhanced running accuracy. |
| DGA | Specifies the Universal Matchable (SU) pairing designation and an Extra Light (A) preload for minimal friction and high-speed capability. |
71948 ACD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The double row angular contact design and 25° contact angle provide superior resistance to combined loads, ensuring stable operation under heavy radial and bidirectional axial forces.
- Super-Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on the bore diameter, outside diameter, and width, resulting in exceptionally smooth and accurate rotation.
- Optimized for High Speeds: The lightweight phenolic cage and open seal type minimize friction and allow for efficient lubrication, enabling a high limiting speed of 7,500 rpm.
- Universal Matching (SU): This feature allows for simplified mounting of two bearings in a universal arrangement, guaranteeing consistent preload and performance without selective assembly.
- Robust Material Construction: Made from high-grade chrome steel for both rings and balls, ensuring long service life and durability under demanding operating conditions.
71948 ACD/P4ADGA Bearing Typical Application Areas
The 71948 ACD/P4ADGA is specifically designed for high-performance machinery requiring utmost precision and speed. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Applications demanding minimal runout and high positional accuracy.
- High-Frequency Motors and Spindles: Where exceptional rotational stability is critical.
- Aerospace and Defense Systems: Gyroscopes, radar equipment, and other precision instruments.
