7018 ACDGB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7018 ACDGB/P4A
Basic Information
System of measurement
Metric
Weight
1.16 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
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
20
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
16672 lbf
Radial static load rating
16200 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
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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7018 ACDGB/P4A Bearing Product Overview & Core Advantages
The 7018 ACDGB/P4A is a single-row angular contact ball bearing engineered for applications demanding exceptional precision and reliability. Manufactured to P4A tolerance class, this bearing delivers superior running accuracy. Its key advantage lies in its ability to accommodate high combined loads, efficiently handling both radial and significant axial loads in one direction. The 25° contact angle and Universal Matchable (SU) design allow for flexible mounting in preloaded sets, providing high system rigidity and operational stability in demanding environments.
7018 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7018 | Basic bearing series, defining the boundary dimensions (90mm bore, 140mm OD, 24mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| DGB | Indicates a Universal Matchable (SU) bearing, designed to be mounted in sets (typically 2 or more) to achieve preload and handle bidirectional axial loads. |
| P4A | Specifies the tolerance class, denoting very high precision for both dimensional and running accuracy. |
7018 ACDGB/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: The P4A super-precision tolerances and phenolic cage ensure minimal vibration and high running accuracy, which is critical for applications like machine tool spindles. The inherent design provides excellent system stiffness when mounted in preloaded arrangements.
- Superior Load Capacity: With a 25° contact angle and optimized internal geometry, this bearing is designed to support significant combined radial and axial loads.
- High-Speed Capability: The lightweight and robust phenolic cage is ideal for high-speed operation, contributing to a high limiting speed and stable performance.
- Optimized for Matched Sets: The Universal Matchable (SU) feature allows bearings to be supplied in pre-ground sets (this bearing is part of a set of 3), enabling precise preload control for maximum rigidity and accuracy in the final application.
7018 ACDGB/P4A Bearing Typical Application Areas
This high-precision angular contact bearing is ideally suited for:
- Machine Tool Spindles (milling, grinding, boring)
- High-Frequency Motors and Precision Gearboxes
- Industrial Pumps and Compressors
- Robotics and Automation Equipment
- Medical and Laboratory Equipment
