71918 CE/HCPA9ADGA
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 71918 CE/HCPA9ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and reliability. This universal matchable bearing features a 15° contact angle and is supplied as a pre-loaded pair (SU arrangement), enabling it to handle combined radial and axial loads simultaneously. Manufactured to PA9A tolerance class, it delivers superior running accuracy and high-speed capability up to 15,000 rpm, making it ideal for high-performance spindles and precision machinery.
71918 CE/HCPA9ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| CE | Hybrid Ceramic Balls | Reduced friction, higher speed capability, and longer service life |
| HCPA9A | High-Precision Tolerance (PA9A) with Specific Internal Design | Exceptional running accuracy and minimal vibration |
| DGA | Universal Matchable (SU) with Extra Light Preload (Class A) | Simplified mounting, optimized stiffness, and immediate precision performance |
Structural Features and Performance Benefits
Hybrid Ceramic Design: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces centrifugal forces, enabling higher limiting speeds while providing electrical insulation and superior wear resistance.
Precision Engineering: Manufactured to PA9A tolerance class with extremely tight dimensional tolerances (bore/OD: -0.004mm to 0), ensuring exceptional running accuracy and system stability.
Optimized Internal Geometry: The 15° contact angle and precision-ground raceways provide optimal load distribution, capable of handling combined loads with high rigidity.
Advanced Cage Technology: The phenolic resin cage offers excellent strength-to-weight ratio, reduced friction, and superior performance at high speeds.
Universal Matching Capability: As universal matchable bearings (SU), they can be mounted in various preload configurations without selective matching, simplifying installation and maintenance.
71918 CE/HCPA9ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision lathes
- Precision Instrumentation: Measuring equipment, optical scanners, and coordinate measuring machines
- High-Speed Motors: Servo motors, spindle motors, and high-frequency drives
- Aerospace Systems: Gyroscopes, navigation systems, and auxiliary power units
- Medical Equipment: Dental handpieces, surgical tools, and imaging system rotors
