71912 ACBGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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71912 ACBGA/HCP4A Bearing Product Overview & Core Advantages
The 71912 ACBGA/HCP4A is a single-row angular contact ball bearing engineered for applications demanding ultra-high precision and exceptional performance. Manufactured to P4A tolerance class, this bearing delivers superior running accuracy and rotational stability. Its 25° contact angle is optimized to handle significant axial loads in one direction while accommodating combined radial and axial loads. The use of ceramic balls and a phenolic cage enables outstanding high-speed capabilities up to 33,000 rpm, reduced friction, and extended service life, making it ideal for the most demanding precision machinery.
71912 ACBGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71912 | Basic bearing series and size designation. |
| AC | Angular Contact design. |
| B | 40° contact angle (superseded by the specified 25° in this product's configuration). |
| GA | Indicates a specific internal design and preload group for universal matching (SU). Two bearings are supplied as a matched set. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls for superior speed and durability. |
| P4A | The tolerance class, denoting extremely high precision for dimensional and running accuracy. |
71912 ACBGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and enables higher limiting speeds. This construction also offers improved resistance to wear and a longer operational life.
- Precision Phenolic Cage: The lightweight and robust phenolic resin cage provides excellent guidance for the ceramic balls, contributing to smooth operation and stability at high speeds.
- Extra Light Preload (Class A): This preload class minimizes axial and radial play, ensuring high system rigidity, precise shaft positioning, and reduced noise and vibration levels.
- Superior Load Capacity: With a dynamic load rating of 2194 lbf and a static load rating of 1868 lbf, this bearing is designed to handle demanding combined loads reliably.
- Universal Matchable (SU): Supplied as a matched pair, these bearings can be arranged in tandem, back-to-back, or face-to-face configurations to optimize performance for specific application requirements regarding load capacity and rigidity.
71912 ACBGA/HCP4A Bearing Typical Application Areas
The 71912 ACBGA/HCP4A is ideally suited for high-performance applications where precision, speed, and reliability are paramount. Key industries and equipment include:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Motors and Turbomachinery
- Aerospace and Defense Actuation Systems
- Medical and Dental Drill Handpieces
- Semiconductor Manufacturing Equipment
