71920 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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71920 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The 71920 ACEGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered with a 25° contact angle and manufactured to P4A tolerance class, this bearing delivers superior rotational accuracy and rigidity. Its capability to handle combined loads (simultaneous radial and axial loads) makes it an ideal solution for complex load scenarios. The use of ceramic balls and a phenolic cage contributes to its high-speed capabilities, low friction, and extended service life, positioning it as a premium choice for high-reliability machinery.
71920 ACEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| AC | Angular Contact (25° contact angle) | Optimized for high axial load capacity and rigidity |
| EGA | Universal Matchable (SU) bearing in a set of 4 | Enables precise preload configuration in multi-bearing arrangements |
| HC | Hybrid Ceramic (Silicon Nitride balls) | Enhanced speed capability, reduced weight, and electrical insulation |
| P4A | High Precision Tolerance Class | Exceptional dimensional and running accuracy for critical applications |
71920 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride ceramic balls significantly reduces centrifugal forces, enabling higher limiting speeds (16,000 rpm) while providing electrical insulation and superior wear resistance.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore diameter tolerance: -0.004mm to 0), this bearing ensures minimal runout and vibration for ultra-precise applications.
Optimized Cage Design: The phenolic resin cage offers excellent strength-to-weight ratio, reduced friction, and compatibility with high-speed operation, contributing to the bearing's overall high-speed performance.
Universal Matching Capability: As part of a universally matchable set, these bearings can be arranged in various configurations (back-to-back, face-to-face, or tandem) to achieve specific preload and stiffness requirements without selective matching.
71920 ACEGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision lathes
- Aerospace Systems: Jet engine components, helicopter transmissions, and auxiliary power units
- Medical Equipment: High-speed dental handpieces, surgical robots, and MRI scanner components
- Semiconductor Manufacturing: Wafer handling robots, precision stages, and vacuum chamber equipment
- High-Speed Motors: Industrial spindles, turbochargers, and specialized electric motors
