7018 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7018 CD/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
2.03 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
48 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
20
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
28575 lbf
Radial static load rating
34425 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 727.09
/ each
In Stock
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7018 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The 7018 CD/HCP4ADGA is a precision angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and high-speed performance. As a universal matchable bearing supplied in a duplex set, it is designed to accommodate combined loads (radial and axial) simultaneously. Its construction with ceramic balls and P4A super-precision tolerance ensures low heat generation, minimal vibration, and extended service life in high-rigidity systems.
7018 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Universal Matchable duplex bearing set with a 15° contact angle. |
| HC | Hybrid Ceramic: Features ceramic balls for reduced friction and higher speed capability. |
| P4A | Super Precision tolerance class, exceeding ABEC 7 standards, for superior running accuracy. |
| DGA | Indicates the bearing is lubricated and supplied as a pre-set matched pair. |
7018 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex arrangement and 15° contact angle provide high axial and radial stiffness, enabling stable operation under combined loads.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a high limiting speed of 15,000 rpm.
- Exceptional Precision: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for precision spindles.
- Optimized for Matched Sets: As a Universal Matchable (SU) bearing, two bearings can be mounted together in various preload configurations (face-to-face, back-to-back) without selective assembly.
7018 CD/HCP4ADGA Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery requiring utmost precision and speed, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and main drives.
- High-Frequency Motors and Spindles
- Aerospace & Defense Systems: Gyroscopes, radar systems.
- Medical Equipment: Dental handpieces, high-speed centrifuges.
