7018 ACDGC/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7018 ACDGC/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
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7018 ACDGC/P4A Bearing Product Overview & Core Advantages
The 7018 ACDGC/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As a single bearing with a 25° contact angle and Moderate (Class C) preload, it is engineered to support combined loads—handling significant radial loads and axial loads in one direction simultaneously. Its P4A tolerance class ensures ultra-precise dimensions and running accuracy, making it ideal for high-speed spindles and precision machinery where high rigidity and operational reliability are paramount.
7018 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle. |
| DGC | Universal Matchable (SU) bearing. Can be mounted in pairs (DB, DF, DT) without special selection to achieve preload. |
| P4A | High-Precision Tolerance Class, exceeding ABEC 7/ISO P4 standards, with enhanced running accuracy requirements. |
7018 ACDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The 25° contact angle and Moderate preload provide high system rigidity, enabling the bearing to effectively handle combined radial and axial loads. The robust construction with a phenolic cage contributes to stable operation under load.
- Precision High-Speed Performance: Manufactured to P4A tolerance class with a phenolic cage, this bearing is optimized for high-speed applications up to 15,000 rpm. The cage design and precision grinding minimize friction and heat generation.
- Universal Matching & Simplified Assembly: The Universal Matchable (DGC) feature allows for simplified mounting of multiple bearings in preloaded arrangements (back-to-back, face-to-face, or tandem) without selective matching, reducing assembly time and complexity.
- Durable Material Construction: Components made from chrome steel for both rings and balls ensure high durability, wear resistance, and a long service life under demanding operating conditions.
7018 ACDGC/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for applications requiring high speed, accuracy, and rigidity, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Aerospace Control Systems
