71918 ACEGA/HCP4AL
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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71918 ACEGA/HCP4AL Bearing Product Overview & Core Advantages
The 71918 ACEGA/HCP4AL is a single-row angular contact ball bearing engineered for ultra-high precision applications. Positioned in the P4A tolerance class, this bearing delivers exceptional rotational accuracy and dimensional stability. Its ceramic balls and phenolic cage enable superior high-speed performance with a limiting speed of 15,000 rpm, while the 25° contact angle provides optimal capacity for combined radial and axial loads. The extra light preload (Class A) ensures minimal friction and smooth operation, making it ideal for machine tool spindles and other demanding precision machinery.
Model Code Breakdown
| Suffix | Technical Meaning |
|---|---|
| AC | Angular Contact design with 25° contact angle |
| EGA | Universal Matchable (SU) bearing set arrangement |
| HC | Hybrid Ceramic balls for enhanced performance |
| P4A | Super precision tolerance class |
| L | Light preload classification |
71918 ACEGA/HCP4AL Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride ceramic balls significantly reduces friction, heat generation, and wear, enabling higher speeds and longer service life compared to all-steel bearings.
Phenolic Resin Cage: The lightweight phenolic cage provides excellent dimensional stability at high speeds and temperatures, contributing to smooth operation and reduced vibration.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional tolerances (bore: -0.004mm to 0, OD: -0.004mm to 0), ensuring consistent high-precision performance in demanding applications.
Universal Matching Capability: Designed as Universal Matchable (SU) bearings, they can be paired in sets of 2 to achieve specific preload and stiffness requirements without selective matching.
Optimized Load Capacity: With a dynamic load rating of 6435 lbf and static load rating of 5130 lbf, this bearing handles significant combined loads while maintaining precision.
71918 ACEGA/HCP4AL Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers and precision grinding machines
- Precision Robotics: Robot arm joints and rotary tables requiring high accuracy
- Aerospace Systems: Gyroscopes, navigation systems, and aircraft instrumentation
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
- High-Speed Motors: Spindle motors and high-frequency electric motors
- Semiconductor Manufacturing: Wafer handling equipment and precision positioning stages
