7018 CEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7018 CEGA/HCP4A Bearing Product Overview & Core Advantages
The 7018 CEGA/HCP4A is a single row angular contact ball bearing engineered for the most demanding high-precision and high-speed applications. Characterized by its P4A super-precision tolerance and ceramic ball construction, this bearing delivers exceptional rotational accuracy, minimal heat generation, and extended service life. Its 15° contact angle is optimized to support significant combined loads, making it an ideal choice for spindles requiring superior rigidity and performance.
7018 CEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 7018 CEGA/HCP4A provides detailed technical specifications:
- 7018: Standard bearing series designation, indicating a 90mm bore and 140mm outside diameter.
- C: Denotes a 15° contact angle.
- E: Signifies an Extra light / Class A preload for minimal running torque and high-speed capability.
- GA: Indicates the bearing is Lubricated with a specific grease.
- HC: Refers to the use of Hybrid Ceramic balls (ceramic balls with steel rings).
- P4A: Defines the tolerance class, representing superior dimensional and running accuracy beyond ABEC 7.
7018 CEGA/HCP4A Bearing Structural Features & Performance Benefits
The design of the 7018 CEGA/HCP4A incorporates several key features that directly translate to performance benefits:
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls reduces centrifugal forces, lowers operating temperature, and provides electrical insulation, enabling higher limiting speeds and longer lubrication life.
- Phenolic Resin Cage: The lightweight and robust phenolic cage ensures stable operation at high speeds with excellent guidance and low friction.
- Super-Precision P4A Tolerance: Guarantees extremely tight bore, outside diameter, and width tolerances for exceptional running accuracy and system rigidity, which is critical for machine tool spindles.
- Universal Matchable (SU) Design: These bearings are manufactured to be universally matchable, allowing any two bearings to be mounted together in a back-to-back, face-to-face, or tandem arrangement without performance loss, simplifying installation and inventory.
7018 CEGA/HCP4A Bearing Typical Application Areas
The 7018 CEGA/HCP4A is specified for high-performance machinery where precision, speed, and reliability are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotic Drives: Articulated arms and high-accuracy rotary joints.
- High-Frequency Motors and Spindles: Applications requiring minimal vibration and heat generation.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other critical navigation equipment.
