71930 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
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71930 CD/HCP4A Bearing Product Overview & Core Advantages
The 71930 CD/HCP4A is a single-row angular contact ball bearing engineered for applications demanding exceptional precision and high-speed performance. This precision bearing features a 15° contact angle and is supplied with a preload, ensuring high system rigidity and minimal axial/radial runout. Its construction with ceramic balls and a phenolic cage enables superior limiting speeds and reduced rotational inertia. Designed to handle combined loads (radial and axial), it is an ideal solution for high-reliability, high-accuracy machinery.
71930 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71930 | Basic bearing designation, indicating a high-precision, light series angular contact bearing. |
| CD | Indicates a 15° contact angle and a specific internal design optimized for high-speed operation and preload. |
| HC | Signifies the use of Hybrid Ceramic balls (ceramic balls with steel rings), offering reduced weight, lower friction, and higher speed capability. |
| P4 | Denotes the tolerance class P4 (ABEC-7), representing extremely tight dimensional and running accuracy tolerances. |
| A | Indicates that the bearing is supplied with a preload for enhanced rigidity and precise rotational accuracy. |
71930 CD/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces friction, heat generation, and wear. This allows for a higher limiting speed and extended service life, especially in high-speed applications.
Phenolic Resin Cage: The lightweight and robust phenolic cage provides excellent dimensional stability and guidance for the ceramic balls, contributing to smooth operation at ultra-high speeds.
High Rigidity & Precision: The 15° contact angle and factory-applied preload ensure high system stiffness, accurate shaft positioning, and superior running performance under combined loads.
Superior Load Capacity: With a dynamic load rating of 25,650 lbf and a static load rating of 29,700 lbf, this bearing is capable of handling significant radial and axial forces simultaneously.
71930 CD/HCP4A Bearing Typical Application Areas
The 71930 CD/HCP4A is ideally suited 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 Robotics: High-accuracy robotic arms and joints.
- Aerospace & Defense Systems: Gyroscopes, avionics, and radar systems.
- High-Speed Motors & Spindles: Electric motors and spindles for PCB drilling and semiconductor manufacturing.
