71913 CB/HCP4A
Hybrid Ceramic Super Precision Bearings
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71913 CB/HCP4A Bearing Product Overview & Core Advantages
The 71913 CB/HCP4A is a single-row angular contact ball bearing engineered for high-precision applications requiring superior rotational accuracy and rigidity. This P4 (ABEC-7) tolerance class bearing is designed to accommodate high combined loads, primarily thrust loads in one direction, making it ideal for machine tool spindles and other high-speed, high-accuracy machinery. Its compact design, featuring a ceramic ball and phenolic cage, contributes to lower friction, reduced weight, and enhanced high-speed performance.
71913 CB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71913 | Basic bearing series and size designation. |
| CB | Specific internal design and contact angle (15°) for optimized load distribution. |
| HC | Hybrid Ceramic, indicating the use of ceramic balls for reduced weight, lower friction, and higher speed capability. |
| P4 | Precision tolerance class (equivalent to ABEC-7), ensuring extremely tight dimensional and running accuracy. |
| A | Indicates that the bearing is supplied with a specific preload for immediate high-rigidity performance. |
71913 CB/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and enables a limiting speed of 36,000 rpm. This results in extended service life, especially in high-speed applications.
- Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability and low friction at high speeds, contributing to smooth operation and reduced vibration.
- 15° Contact Angle & Preload: The optimized contact angle is designed for high thrust load capacity. The factory-applied preload ensures high system rigidity, minimal axial play, and precise rotational accuracy from the moment of installation.
- Super-Precision P4 Tolerance: Manufactured to P4 tolerance class, this bearing guarantees exceptional running accuracy, low noise, and minimal vibration, which is critical for the performance of precision spindles.
71913 CB/HCP4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for demanding applications where speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and lathes.
- Precision Instruments: Measuring equipment, optical scanners, and coordinate measuring machines (CMM).
- High-Speed Motors and Drives: Electric spindles and high-frequency motorized spindles.
- Aerospace & Defense: Gyroscopes, radar systems, and other critical navigation and control systems.
