7018 CE/HCP4ALDBA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7018 CE/HCP4ALDBA Bearing Product Overview & Core Advantages
The 7018 CE/HCP4ALDBA is a duplex back-to-back angular contact ball bearing designed for extreme precision and performance. This P4A super-precision bearing features a ceramic ball construction and phenolic cage, engineered to deliver exceptional high-speed capability and thermal stability. Its extra light preload (Class A) and duplex DB arrangement provide superior running accuracy and rigidity, making it ideal for applications demanding the highest levels of rotational precision and combined load capacity.
7018 CE/HCP4ALDBA Bearing Model Code Explained, Specifications & Naming Convention
| 7018 | Basic bearing series with 90mm bore diameter and 140mm outside diameter |
| CE | Ceramic balls (Silicon Nitride) for enhanced speed capability and reduced friction |
| HCP4A | P4A tolerance class with enhanced running accuracy and dimensional stability |
| LD | Light preload designation for optimal stiffness in precision applications |
| BA | Back-to-back duplex arrangement for moment load capacity and high rigidity |
7018 CE/HCP4ALDBA Bearing Structural Features & Performance Benefits
Advanced Material Construction: The combination of chrome steel rings with ceramic balls significantly reduces centrifugal forces, enabling higher limiting speeds (15,000 rpm) while maintaining dimensional stability across the operating temperature range (-30°C to 110°C).
Enhanced Rigidity & Accuracy: The duplex back-to-back arrangement creates a pre-stressed system that provides exceptional stiffness against complex loading conditions. The P4A tolerance class ensures minimal runout and superior rotational accuracy for precision applications.
High-Speed Performance: The phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at high speeds, while the 15° contact angle optimizes the balance between radial and axial load capacity.
Precision Engineering: With tight dimensional tolerances (bore: -0.004mm to 0, outside diameter: -0.004mm to 0) and 28 ceramic balls of 11.112mm diameter, this bearing delivers consistent performance under demanding conditions.
7018 CE/HCP4ALDBA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision milling applications
- Precision Instrumentation: Measuring equipment, optical systems, and laboratory instruments requiring extreme accuracy
- Aerospace Systems: Gyroscopes, navigation equipment, and auxiliary power units
- High-Speed Motors: Spindle motors, high-frequency generators, and turbo-molecular pumps
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
