71912 CB/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71912 CB/HCP4A Bearing Product Overview & Core Advantages
The 71912 CB/HCP4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and reliability. Engineered with ceramic balls and P4 (ABEC-7) tolerance class, it delivers superior performance in high-speed and high-rigidity scenarios. Its primary advantage lies in its ability to accommodate combined loads, efficiently handling both radial and significant axial loads in one direction. The phenolic cage and available preload contribute to its stable operation and precise shaft positioning, making it an ideal solution for advanced machinery.
71912 CB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71912 | Basic bearing designation indicating the bearing size (60mm bore, 85mm OD, 13mm width) |
| CB | Specific internal design with a 15° contact angle and optimized internal clearance for matched arrangement |
| HC | Hybrid Ceramic construction, featuring ceramic balls and steel rings |
| P4 | Tolerance class equivalent to ABEC-7, ensuring ultra-precise dimensional and running accuracy |
| A | Indicates the bearing is supplied with a specific preload for enhanced rigidity |
71912 CB/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The combination of chrome steel rings and ceramic balls significantly reduces friction and heat generation, enabling higher limiting speeds (40,000 rpm) and extended service life. The lower density of ceramic balls also reduces centrifugal forces, which is critical for high-speed applications.
Phenolic Resin Cage: This lightweight and robust cage material provides excellent dimensional stability and operates smoothly at high speeds, contributing to the bearing's quiet operation and high rotational accuracy.
15° Contact Angle & Preload: The optimized contact angle is ideal for applications requiring high axial load capacity alongside radial loads. The available preload eliminates internal clearance, resulting in superior system rigidity, precise shaft positioning, and reduced vibration.
Precision Engineering: Manufactured to P4 tolerance class, this bearing ensures minimal runout and consistent performance, which is essential for applications where positioning accuracy is paramount.
71912 CB/HCP4A Bearing Typical Application Areas
The 71912 CB/HCP4A is specifically engineered for high-performance applications, including:
- High-Speed Machine Tool Spindles: For milling, grinding, and drilling where precision and speed are critical.
- Precision Robotics: In robot arm joints and actuators requiring high rigidity and accuracy.
- Aerospace & Defense Systems: Gyroscopes, navigation systems, and other instrumentation.
- Medical Equipment: High-speed dental handpieces and surgical drills.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
