7018 ACD/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7018 ACD/P4ADBA
Basic Information
System of measurement
Metric
Weight
2.32 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
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
20
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
27225 lbf
Radial static load rating
32175 lbf
Limiting speed
16 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
Price:
$ 515.75
/ each
In Stock
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7018 ACD/P4ADBA Bearing Product Overview & Core Advantages
The 7018 ACD/P4ADBA is a precision duplex angular contact ball bearing configured in a back-to-back (DB) arrangement. Engineered to the exacting P4A tolerance class, this bearing is designed for applications demanding exceptional rotational accuracy, high rigidity, and reliable performance under combined loads. Its duplex DB setup provides excellent moment load capacity and axial rigidity in both directions, making it ideal for high-precision spindles and other critical machinery components.
7018 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Indicates a duplex bearing in a Back-to-Back (DB) arrangement with a 25° contact angle. |
| P4A | Denotes a high-precision tolerance class with enhanced running accuracy requirements. |
| DB | Specifies the Back-to-Back mounting of the duplex pair. |
7018 ACD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Moment Load Capacity: The duplex back-to-back (DB) configuration creates a wide effective spread, significantly increasing the bearing's resistance to moment loads and providing high system rigidity.
- Superior Precision: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for maintaining machining accuracy and surface finish quality.
- Optimized for Combined Loads: The 25° contact angle provides an excellent balance, enabling the bearing to support substantial radial loads alongside bidirectional axial loads.
- High-Speed Capability: The lightweight and robust phenolic resin cage ensures stable operation and guides the balls effectively, contributing to the high limiting speed of 16,000 rpm.
- Premium Material Construction: Components made from chrome steel offer high hardness, wear resistance, and a long operational lifespan under demanding conditions.
7018 ACD/P4ADBA Bearing Typical Application Areas
This precision duplex bearing is ideally suited for high-performance applications where accuracy, rigidity, and speed are paramount. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Motor Spindles
- Industrial Pumps and Compressors
- Advanced Robotics and Automation Equipment
