71912 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 71912 ACEGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. As a single bearing with Universal Matchable (SU) designation, it can be precisely paired with a second identical bearing to form a preloaded set, delivering superior system rigidity and rotational accuracy. Its construction featuring a phenolic cage and ceramic balls enables outstanding high-speed capabilities and reduced rotational mass. This bearing is engineered to handle combined loads, with a 25° contact angle providing excellent axial load capacity in one direction.
71912 ACEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71912 | Basic bearing series and size designation |
| AC | Angular Contact design with 25° contact angle |
| EGA | Universal Matchable (SU) bearing with specific preload grouping |
| HC | Hybrid Ceramic construction with ceramic balls and steel rings |
| P4A | High-precision tolerance class with enhanced running accuracy |
Structural Features and Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride ceramic balls significantly reduces friction, heat generation, and wear, enabling higher operating speeds and extended service life compared to all-steel bearings.
Phenolic Cage Design: The lightweight phenolic resin cage provides excellent dimensional stability at high speeds and temperatures, contributing to the bearing's impressive limiting speed of 36,000 rpm.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on bore diameter (60 mm), outside diameter (85 mm), and width (13 mm), ensuring consistent performance and precise shaft positioning.
Optimized Load Capacity: With a dynamic load rating of 3442 lbf and static load rating of 2475 lbf, this bearing delivers reliable performance under demanding operational conditions.
71912 ACEGA/HCP4A Bearing Typical Application Areas
- High-speed machine tool spindles and precision machining centers
- Medical and dental equipment requiring high rotational accuracy
- Aerospace components and instrumentation systems
- Semiconductor manufacturing equipment
- High-frequency motors and precision robotics
- Laboratory and analytical instruments
