71912 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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71912 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The 71912 CD/HCP4ADGA is a precision angular contact ball bearing engineered for applications demanding exceptional accuracy and high-speed performance. As a universally matchable (SU) bearing supplied in a pre-set pair, it is designed to accommodate combined loads, specifically high-precision axial loads in one direction. Its core advantages stem from a P4A super-precision tolerance class, a ceramic ball construction, and a phenolic cage, making it ideal for high-rigidity, high-reliability spindles and machinery where thermal stability and low vibration are critical.
71912 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71912 | Basic bearing series and size designation. | Identifies the bearing's internal geometry and bearing dimensions (60mm bore, 85mm OD). |
| C | 15° contact angle design. | Optimized for high-speed operation and efficient axial load carrying. |
| D | Enhanced internal design. | Indicates optimized internal geometry for improved performance. |
| HC | Hybrid Ceramic construction. | Features ceramic balls for reduced friction, higher speed capability, and non-conductivity. |
| P4A | Tolerance Class. | Denotes super-precision running accuracy, tighter than ABEC 7/ISO P4. |
| DGA | Universal Matchable (SU) pair in Extra Light preload (A). | Supplied as a pre-lubricated, universally matchable pair with a specific preload for immediate, optimized performance in a duplex set. |
71912 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction and heat generation, enabling higher limiting speeds (36,000 rpm). It also offers electrical insulation and superior performance in lubricant-starved conditions.
Phenolic Cage: The lightweight and robust phenolic resin cage contributes to smooth operation at very high speeds, offering excellent strength and guidance for the ceramic balls.
High Rigidity & Precision: The angular contact design and P4A tolerance class provide exceptional system rigidity and running accuracy, minimizing deflection and vibration for superior machining finishes.
Universal Matchability (SU): As a universally matchable pair (DGA suffix), these bearings can be arranged in back-to-back (DB), face-to-face (DF), or tandem (DT) configurations, offering design flexibility to handle complex combined loads and moments.
71912 CD/HCP4ADGA Bearing Typical Application Areas
This high-performance precision bearing is ideally suited for the most demanding applications, including:
- High-Speed Machine Tool Spindles (e.g., for milling, grinding, and drilling)
- Precision Grinding Spindles
- High-Frequency Motors and High-Speed Turbomachinery
- Aerospace & Defense Instrumentation
- Other equipment requiring extreme rotational accuracy, high rigidity, and thermal stability.
