71912 CD/HCP4AQGA
Hybrid Ceramic Super Precision Bearings
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71912 CD/HCP4AQGA Bearing Product Overview & Core Advantages
The 71912 CD/HCP4AQGA is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and reliability. This universal matchable (SU) bearing is designed to accommodate combined loads, handling significant radial loads and axial loads in one direction simultaneously. Its extra light preload (Class A) and P4A super-precision tolerance ensure smooth, quiet operation with minimal runout, making it ideal for high-speed spindles and other precision machinery. The use of ceramic balls and a phenolic cage further enhances its performance in demanding environments.
71912 CD/HCP4AQGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71912 | Basic bearing designation, indicating a high-precision angular contact bearing series with a 60 mm bore, 85 mm OD, and 52 mm width. |
| CD | Contact angle of 15°. |
| HC | Hybrid Ceramic construction, featuring ceramic balls for reduced weight, lower friction, and enhanced speed capability. |
| P4A | Super Precision Tolerance Class, providing extremely tight dimensional and running accuracy for critical applications. |
| QGA | Indicates the bearing is part of a Universal Matchable (SU) set of 4 bearings, pre-configured for optimal performance when mounted in a specific arrangement (e.g., back-to-back or face-to-face). |
71912 CD/HCP4AQGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and enables higher limiting speeds compared to all-steel bearings. This design also offers improved resistance to electrical erosion.
High Rigidity & Load Capacity: The angular contact design and precise 15° contact angle provide high rigidity, making it capable of supporting substantial combined radial and axial loads.
Superior High-Speed Performance: The lightweight phenolic resin cage and low-density ceramic balls work in concert to minimize inertial forces, allowing the bearing to achieve a high limiting speed of 36,000 rpm.
Precision & Stability: Manufactured to P4A tolerance class with an extra light preload, this bearing ensures minimal vibration and high rotational accuracy, which is critical for applications like machine tool spindles.
71912 CD/HCP4AQGA Bearing Typical Application Areas
This high-performance bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors & Spindles: Where extreme rotational accuracy and speed are required.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
