7018 FEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7018 FEGA/HCP4A
Basic Information
System of measurement
Metric
Weight
1.11 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
90 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.004mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
18 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
8055 lbf
Radial static load rating
7088 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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7018 FEGA/HCP4A Bearing Product Overview & Core Advantages
The 7018 FEGA/HCP4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional accuracy and performance. As a single bearing with a 18° contact angle and Extra light preload (Class A), it is optimized for high-speed operation while providing superior rigidity. Its construction with ceramic balls and a phenolic cage enables a very high limiting speed and reduced rotational mass. This bearing is Universal Matchable (SU), allowing for precise preload control when mounted in sets, making it ideal for high-precision, high-rigidity spindles.
7018 FEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7018 | Basic bearing series and size designation. | Defines the core dimensions: 90mm bore, 140mm OD, 24mm width. |
| FE | Filled with a special, high-performance grease. | Ensures immediate and reliable lubrication for high-speed operation. |
| GA | Universal Matchable bearing (SU designation). | Allows for flexible mounting in any combination (DB, DF, DT) to achieve desired preload and rigidity. |
| HC | Hybrid Ceramic construction. | Indicates the use of ceramic balls for reduced friction, higher speed capability, and longer service life. |
| P4A | High precision tolerance class. | Guarantees extremely tight dimensional and running accuracy for superior performance in demanding applications. |
7018 FEGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces friction, heat generation, and wear. This directly contributes to the high limiting speed and extended bearing life, even under demanding conditions.
- Phenolic Resin Cage: The lightweight and robust phenolic cage offers excellent dimensional stability and low friction at high rotational speeds, further enhancing the bearing's high-speed performance.
- High Rigidity & Load Capacity: The 18° contact angle and Class A preload provide high axial and radial rigidity, enabling the bearing to handle combined loads effectively. The high dynamic and static load ratings ensure reliable operation under significant stress.
- Ultra-Precision: The P4A tolerance class ensures minimal runout and vibration, which is critical for applications requiring extreme rotational accuracy and smooth operation.
7018 FEGA/HCP4A Bearing Typical Application Areas
The 7018 FEGA/HCP4A is specifically designed for high-end machinery where precision, speed, and reliability are paramount. Key application areas include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines.
- Precision Instruments: High-frequency spindles for PCB drilling and precision measuring equipment.
- Aerospace & Defense: Gyroscopes, radar systems, and other critical high-speed rotating assemblies.
- High-Speed Motors: Spindles for electric vehicles and industrial high-RPM motors.
