71912 ACEGA/HCP4AH1
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71912 ACEGA/HCP4AH1 Bearing Product Overview & Core Advantages
The 71912 ACEGA/HCP4AH1 is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered with ceramic balls and manufactured to P4A tolerance class, this bearing delivers superior speed capabilities, reduced friction, and extended service life. Its 25° contact angle is optimized to handle significant combined loads (radial and axial) simultaneously, making it an ideal solution for high-rigidity, high-speed spindle systems. The extra light preload (Class A) ensures smooth operation with minimal deflection, which is critical for maintaining precision in machining and rotational equipment.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71912 | Basic bearing series and size designation (60mm bore, 85mm OD, 13mm width) |
| AC | Angular Contact design with a 25° contact angle |
| EGA | Universal Matchable (SU) bearing set, supplied as a matched pair of 2 bearings |
| HC | Hybrid Ceramic construction featuring ceramic balls and steel rings |
| P4A | High-Precision Tolerance Class (superior to ABEC 7) |
| H | Precision Ground Bearings |
71912 ACEGA/HCP4AH1 Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces friction, heat generation, and wear. This construction enables higher limiting speeds (36,000 rpm) and provides electrical insulation properties.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for superior rotational accuracy.
Optimized Load Capacity: The 25° contact angle and precision raceway geometry provide excellent combined load capacity, with dynamic radial load rating of 3,442 lbf and static radial load rating of 2,475 lbf.
High-Speed Performance: The phenolic resin cage offers excellent strength-to-weight ratio and operates effectively at high speeds, while the ceramic balls lower centrifugal forces, enabling the high 36,000 rpm limiting speed.
Matched Set Configuration: Supplied as a universally matchable pair (SU), these bearings can be arranged in various configurations (back-to-back, face-to-face, or tandem) to meet specific application requirements for stiffness and load distribution.
71912 ACEGA/HCP4AH1 Bearing Typical Application Areas
The 71912 ACEGA/HCP4AH1 is specifically engineered for high-performance applications including:
- Machine Tool Spindles: CNC machining centers, grinding spindles, and milling machines
- High-Speed Motors: Precision electric motors and servo drives
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Medical Equipment: Dental handpieces, surgical tools, and imaging devices
- Semiconductor Manufacturing: Wafer handling robots and precision positioning stages
- Test & Measurement Equipment: Coordinate measuring machines and precision instrumentation
