7018 ACE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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7018 ACE/HCP4ADGA Bearing Product Overview & Core Advantages
The 7018 ACE/HCP4ADGA is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This universal matchable (SU) bearing features a P4A tolerance class and ceramic balls, delivering superior high-speed capabilities with a limiting speed of 15,000 rpm. Its 25° contact angle and extra light preload (Class A) make it ideal for applications requiring high rigidity and precise rotational accuracy under combined radial and axial loads. The open design with specialized lubrication ensures optimal performance in controlled environments.
7018 ACE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Performance Benefit |
|---|---|---|
| 7018 | Basic bearing series with 90mm bore, 140mm OD | Standard bearing dimensions for compatibility |
| ACE | 25° contact angle, universal matchable design | Optimized for combined loads and flexible mounting |
| HC | Hybrid ceramic balls | Enhanced high-speed performance and reduced heat generation |
| P4A | Super precision tolerance class | Exceptional running accuracy for precision applications |
Structural Features & Performance Advantages
Hybrid Ceramic Construction: The combination of chrome steel rings with ceramic balls significantly reduces friction and heat generation, enabling higher operating speeds and extended service life. This construction provides excellent electrical insulation properties and superior performance in high-temperature environments.
Precision Phenolic Cage: The phenolic cage material offers excellent dimensional stability and low friction characteristics, contributing to the bearing's high-speed capability of 15,000 rpm. This cage design ensures proper ball guidance and minimal centrifugal forces at elevated speeds.
Universal Matchable Design (SU): As a universal matchable bearing, the 7018 ACE/HCP4ADGA can be mounted in any combination without pre-load adjustment, simplifying installation and maintenance while maintaining optimal bearing rigidity and load distribution.
Enhanced Load Capacity: With a dynamic load rating of 12,442 lbf and static load rating of 13,500 lbf, this bearing delivers reliable performance under significant combined radial and axial loads, making it suitable for high-demand applications.
7018 ACE/HCP4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers and precision grinding spindles requiring exceptional accuracy and high rigidity
- High-Speed Motors: Electric motors and generators operating at elevated speeds where ceramic hybrid technology reduces energy loss
- Aerospace Systems: Aircraft auxiliary systems and instrumentation requiring reliable performance under extreme conditions
- Medical Equipment: High-speed dental handpieces and surgical tools demanding precision and reliability
- Robotics and Automation: Precision robotic joints and automation equipment requiring accurate positioning and high-speed operation
