71960 ACDMA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 71960 ACDMA/HCP4A is a high-precision single row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This bearing is specifically designed to handle combined loads, accommodating significant axial loads in one direction alongside radial loads. Its P4 (ABEC-7) tolerance class ensures superior running accuracy, making it ideal for high-speed spindles and other precision machinery. The combination of a phenolic cage and ceramic balls contributes to its high-speed capability, reduced weight, and excellent operational characteristics.
71960 ACDMA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| 71960 | Basic bearing series and size code (300mm bore, 420mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| DMA | Matched set designation for preload application, ensuring optimal rigidity and rotational accuracy. |
| HCP4A | Indicates the P4 tolerance class and specific internal design enhancements for high-precision performance. |
Structural Features and Performance Benefits
High-Speed Performance: The lightweight phenolic cage and low-density ceramic balls significantly reduce centrifugal forces, enabling a high limiting speed of 4,500 rpm. This design minimizes friction and heat generation.
High Rigidity and Load Capacity: The 25° contact angle and optimized internal geometry provide excellent resistance to axial loads. With a dynamic load rating of 78,975 lbf and a static load rating of 126,000 lbf, this bearing offers robust performance under combined loads.
Precision Engineering: Manufactured to P4 (ABEC-7) tolerance standards, this bearing guarantees minimal runout and vibration, which is critical for maintaining the accuracy of the host system.
Preload and Stability: The bearing is supplied as a preloaded matched set (DMA), which increases system stiffness, improves shaft guidance, and enhances positional accuracy.
71960 ACDMA/HCP4A Bearing Typical Application Areas
The 71960 ACDMA/HCP4A is ideally suited for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Tables: Indexing and positioning systems.
- High-Frequency Motors and Spindles: Applications requiring minimal vibration and high rotational accuracy.
- Aerospace and Defense Systems: Gyroscopes, radar platforms, and other critical rotating assemblies.
