71924 ACD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71924 ACD/P4A Bearing Product Overview & Core Advantages
The 71924 ACD/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Operating under P4 (ABEC-7) tolerance class, it is designed to accommodate combined loads, primarily handling significant axial loads in one direction alongside radial loads. Its compact design, featuring a 25° contact angle, ensures high system stiffness and is optimized for high-speed operation up to 11,000 rpm. Pre-loaded and pre-lubricated, this bearing delivers immediate, reliable performance in demanding environments.
71924 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71924 | Basic bearing series and size designation (120mm bore, 165mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a high rigid design and internal optimization. |
| P4 | Specifies the P4 (ABEC-7) tolerance class for ultra-precision. |
| A | Denotes that the bearing is supplied with a specific preload. |
71924 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class with a phenolic resin cage, this bearing ensures minimal runout and vibration, providing the stability required for ultra-precision spindles and machinery.
- Superior Load Capacity: The 25° contact angle and robust construction enable it to handle high combined loads, with a dynamic load rating of 16,380 lbf and a static load rating of 19,462 lbf.
- Optimized High-Speed Performance: The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 11,000 rpm, making it an ideal high-speed bearing.
- Pre-Lubricated for Immediate Service: The bearing comes pre-lubricated, ensuring optimal performance from the first rotation and reducing initial setup time.
71924 ACD/P4A Bearing Typical Application Areas
The 71924 ACD/P4A is ideally suited for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles for milling, grinding, and turning centers
- High-Frequency Motors and precision spindles
- Robotics and automated handling systems
- Precision Medical Equipment and dental handpieces
- Aerospace Actuation Systems and auxiliary power units
