71909 ACE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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71909 ACE/HCP4ADGA Bearing Product Overview & Core Advantages
The 71909 ACE/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This universal matchable (SU) bearing features a 25° contact angle and P4A tolerance class, enabling it to handle combined radial and axial loads simultaneously with superior running accuracy. Its construction with ceramic balls and phenolic cage provides outstanding high-speed capability, low friction, and extended service life, making it ideal for high-reliability precision machinery.
71909 ACE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| ACE | 25° contact angle, universal matchable design | Optimized for combined loads and flexible mounting configurations |
| HC | Hybrid ceramic balls (silicon nitride) | Higher speed capability, reduced friction, and longer service life |
| P4A | Super precision tolerance class | Exceptional running accuracy and rotational precision |
| DGA | Preloaded pair (Extra light / Class A) | Enhanced rigidity and precise rotational performance |
71909 ACE/HCP4ADGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, enabling higher limiting speeds (41,000 rpm) while providing excellent wear resistance and electrical insulation properties.
Phenolic Resin Cage: The lightweight phenolic cage offers superior strength at high speeds, excellent dimensional stability, and reduced friction compared to metal cages, contributing to the bearing's exceptional high-speed performance.
Universal Matchable Design: As an SU-type universal matchable bearing, the 71909 ACE/HCP4ADGA can be mounted in various configurations (back-to-back, face-to-face, or tandem) without requiring selective matching, simplifying installation and maintenance.
Precision Engineering: With P4A tolerance class and tight dimensional tolerances (bore: -0.004mm to 0), this bearing ensures minimal runout and vibration, making it suitable for applications demanding the highest levels of rotational accuracy.
71909 ACE/HCP4ADGA Bearing Typical Application Areas
- Machine tool spindles - High-speed machining centers and precision grinding machines
- High-frequency motors - Spindles for CNC routers and PCB drilling machines
- Precision instrumentation - Medical equipment, optical scanners, and measuring devices
- Aerospace components - Guidance systems, actuators, and auxiliary power units
- Semiconductor manufacturing equipment - Wafer handling robots and precision positioning systems
