7018 CE/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7018 CE/P4ADBA
Basic Information
System of measurement
Metric
Weight
2.41 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
11.112 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
13162 lbf
Radial static load rating
14400 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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7018 CE/P4ADBA Bearing Product Overview & Core Advantages
The 7018 CE/P4ADBA is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This back-to-back (DB) matched pair configuration is engineered to handle combined radial and axial loads simultaneously. With its P4A super-precision tolerance and extra light preload (Class A), it delivers superior running accuracy, high-speed capability, and stable performance in demanding environments, making it ideal for high-precision spindles and machinery.
7018 CE/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7018 | Basic bearing series, defining the standard dimensions: 90 mm bore, 140 mm outside diameter, 48 mm width. |
| CE | Indicates a duplex back-to-back (DB) matched set with controlled preload. |
| P4A | Denotes a super-precision tolerance class, exceeding normal P4 standards for enhanced running accuracy. |
| DBA | Specifies the back-to-back arrangement (DB) with an extra light preload (Class A). |
7018 CE/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a rigid bearing system that effectively resists moment loads, ensuring exceptional shaft positioning accuracy and operational stability.
- Superior Load Capacity: The 15° contact angle and double-row design (achieved via pairing) enable the bearing to support significant combined radial and axial loads from both directions.
- Precision & High-Speed Performance: Manufactured to P4A super-precision tolerances and featuring a lightweight phenolic resin cage, this bearing minimizes vibration and friction, allowing for smooth operation at high rotational speeds up to 15,000 rpm.
- Optimized for Precision Applications: The extra light preload (Class A) eliminates internal clearance, reducing noise and improving rotational accuracy without generating excessive heat, which is critical for high-precision spindle applications.
7018 CE/P4ADBA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring utmost precision and rigidity.
- Precision Grinding Spindles: Applications where surface finish and dimensional accuracy are paramount.
- High-Frequency Motors: Spindles for PCB drilling and other high-speed electric motors.
- Industrial Robotics: Precision joints and arm assemblies demanding high accuracy and moment load capacity.
