7017 CB/HCP4A
Hybrid Ceramic Super Precision Bearings
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7017 CB/HCP4A Bearing Product Overview & Core Advantages
The 7017 CB/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to a P4 (ABEC-7) tolerance class, it is a single bearing that is preloaded and ready for installation. Its key advantage lies in its ability to handle combined loads—significant radial loads alongside thrust loads in one direction—with high rigidity and operational stability. The combination of a phenolic cage and ceramic balls contributes to its high-speed capability, low friction, and extended service life, making it an ideal choice for high-reliability, high-rotation precision machinery.
7017 CB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7017 | Basic bearing series and size designation (85mm bore, 130mm OD, 22mm width). |
| CB | Specific internal design with a 15° contact angle and preload for enhanced rigidity. |
| HC | Indicates the use of Hybrid Ceramic balls, offering superior speed and longevity. |
| P4A | Denotes a P4 (ABEC-7) tolerance class, ensuring extremely high running accuracy. |
7017 CB/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The CB preload and P4 tolerance ensure minimal deflection under load, providing exceptional rotational accuracy and system stiffness, which is critical for high-precision applications.
- Superior High-Speed Performance: The lightweight phenolic resin cage and low-density ceramic (silicon nitride) balls reduce centrifugal forces, enabling a high limiting speed of 24,000 rpm. This combination also reduces friction and heat generation.
- Enhanced Load Capacity: The 15° contact angle is optimized to handle substantial combined (radial and axial) loads efficiently, making it suitable for applications with complex loading conditions.
- Operational Longevity: The hybrid ceramic design offers increased resistance to wear and a longer operational life compared to all-steel bearings, especially in high-speed and potentially unlubricated scenarios.
7017 CB/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Robotics: In high-accuracy robot arm joints and gears.
- High-Frequency Motors and Spindles: Used in PCB drilling spindles and dental handpieces.
- Aerospace and Defense Systems: In gyroscopes, navigation systems, and other critical instrumentation.
