71948 ACD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
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71948 ACD/P4A Bearing Product Overview & Core Advantages
The 71948 ACD/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, it delivers superior running performance and dimensional stability. Its key advantage lies in its ability to accommodate combined loads, efficiently handling significant radial loads and thrust loads in one direction simultaneously. The bearing is preloaded and comes pre-lubricated, making it an ideal, ready-to-install solution for high-speed machinery demanding maximum reliability and a compact design.
71948 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71948 | Basic bearing series and size designation. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a high load carrying capacity internal design. |
| /P4A | Denotes a P4 (ABEC-7) tolerance class and specific preload level (A). This ensures extremely tight dimensional and running accuracy. |
71948 ACD/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The 25° contact angle and robust internal geometry are optimized to support high combined loads. The phenolic resin cage contributes to the bearing's overall stability and smooth operation.
Superior High-Speed Performance: The lightweight phenolic cage and optimized internal design enable a high limiting speed of 5,300 rpm, making it suitable for demanding spindle applications.
Precision and Reliability: Manufactured to P4 precision class with tight dimensional tolerances, this bearing guarantees minimal runout and vibration, which is critical for the accuracy of the final application.
Ready-to-Install: The bearing is supplied with preload and lubrication, simplifying installation and ensuring immediate, optimal performance without the need for initial setup adjustments.
71948 ACD/P4A Bearing Typical Application Areas
The 71948 ACD/P4A is engineered for high-performance applications where precision and speed are paramount. Its primary uses include:
- Machine Tool Spindles (e.g., milling, grinding, and turning centers)
- High-Frequency Motors
- Precision Gearboxes
- Aerospace Control Systems
- Medical and Laboratory Equipment
