71918 CE/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71918 CE/HCP4A Bearing Product Overview & Core Advantages
The 71918 CE/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. As a single-row bearing, it is optimized to support high combined loads, primarily thrust loads in one direction along with significant radial loads. Its defining features include a P4 (ABEC-7) tolerance class for superior running accuracy, a phenolic resin cage enabling high-speed operation, and ceramic balls that reduce centrifugal forces and provide excellent performance in high-velocity environments. This bearing is preloaded and pre-lubricated, making it an ideal, ready-to-install solution for high-speed and high-rigidity spindle systems.
71918 CE/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71918 | Basic bearing series and size designation (90mm bore, 125mm OD, 18mm width). |
| C | Specifies a 15° contact angle, optimized for high-speed applications. |
| E | Indicates an optimized internal design and enhanced load rating. |
| HC | Signifies the use of Hybrid Ceramic balls (steel rings with ceramic balls). |
| P4A | Denotes a P4 tolerance class with specific running accuracy requirements and availability of preload. |
71918 CE/HCP4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The combination of a lightweight phenolic resin cage and ceramic balls significantly reduces centrifugal forces and friction, allowing the bearing to achieve a high limiting speed of 27,000 rpm. This makes it a premier choice for high-speed spindle bearings.
High Rigidity and Load Capacity: The 15° contact angle and robust internal geometry provide high rigidity, effectively handling combined radial and axial loads. The enhanced design (suffix E) offers a high dynamic and static load rating for its compact cross-section.
Thermal and Dimensional Stability: The phenolic cage and ceramic balls exhibit lower thermal expansion compared to all-steel components, contributing to stable preload and performance across the operating temperature range.
Precision Performance: Manufactured to P4 tolerance standards, this bearing ensures minimal runout and vibration, which is critical for applications demanding the highest levels of precision and surface finish.
71918 CE/HCP4A Bearing Typical Application Areas
The 71918 CE/HCP4A is specifically designed for high-performance machinery where speed, precision, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling spindles and precision engraving machines.
- High-Frequency Motors: Spindles for electric motors operating at very high RPM.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other precision instruments.
