71909 ACEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71909 ACEGA/HCP4A Bearing Product Overview & Core Advantages
The 71909 ACEGA/HCP4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and speed capability. Manufactured to P4A tolerance class, this bearing delivers superior dimensional stability and running accuracy. Its 25° contact angle provides optimal performance for combined loads, effectively handling both radial and axial forces. The combination of ceramic balls and phenolic cage enables high-speed operation up to 41,000 rpm while maintaining dimensional stability across a wide temperature range (-30°C to 110°C).
Model Code Detailed Explanation
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| AC | Angular Contact design | Optimized for combined radial and axial loads |
| EGA | Universal Matchable (SU) bearing set | Precision matching for optimal preload and stiffness |
| HC | Hybrid Ceramic (Silicon Nitride balls) | Reduced friction, higher speed capability, longer service life |
| P4A | High precision tolerance class | Exceptional running accuracy and dimensional stability |
71909 ACEGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings with ceramic balls significantly reduces friction and heat generation, enabling higher limiting speeds (41,000 rpm) while providing excellent electrical insulation properties.
Phenolic Resin Cage: The lightweight phenolic cage offers superior strength-to-weight ratio, excellent dimensional stability at high speeds, and reduced centrifugal forces, contributing to the bearing's exceptional high-speed performance.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional tolerances (bore: -0.004mm to 0, OD: -0.004mm to 0), this bearing ensures minimal runout and vibration for applications demanding ultra-precise rotation.
Universal Matching Capability: Designed as Universal Matchable (SU) bearings, they can be precisely paired to achieve optimal preload conditions, enhancing system rigidity and accuracy in matched arrangements.
71909 ACEGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers and precision grinding spindles
- High-Frequency Motors: Spindle motors and high-speed servo motors
- Precision Instrumentation: Measuring equipment and laboratory instruments
- Aerospace Systems: Gyroscopes and navigation equipment
- Semiconductor Manufacturing: Wafer processing equipment and cleanroom applications
- Medical Equipment: High-speed dental handpieces and surgical tools
