7018 ACB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7018 ACB/P4A
Basic Information
System of measurement
Metric
Weight
1.25 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
90 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
140 mm
Outside diameter tolerance
-0.009mm to 0
Width
24 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
10.319 mm
Ball quantity
25
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
6075 lbf
Radial static load rating
5310 lbf
Limiting speed
17 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
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:
$ 921.94
/ each
In Stock
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7018 ACB/P4A Bearing Product Overview & Core Advantages
The 7018 ACB/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As a single-row bearing, it is optimized to carry combined loads, specifically high radial loads and unidirectional axial loads. Its P4 (ABEC-7) tolerance class ensures superior running accuracy, making it ideal for high-speed spindles and precision machinery. The availability of preload further enhances system stiffness and positional accuracy, providing reliable performance in critical operations.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7018 | Basic bearing series, defining the standard dimensions: 90mm bore, 140mm OD, 24mm width. |
| ACB | Angular Contact Bearing design with a 25° contact angle. |
| P4A | Indicates a high-precision tolerance class (P4/ABEC-7) and that the bearing is supplied with a specific preload. |
7018 ACB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust construction enable the bearing to support significant combined radial and axial loads. The option for preload eliminates internal clearance, resulting in superior system stiffness and minimal deflection under load.
- High-Speed Performance: The lightweight and durable phenolic resin cage ensures stable operation and reduced centrifugal forces, contributing to a high limiting speed of 17,000 rpm. This makes it a true high-speed bearing.
- Precision Engineering: Manufactured to P4 tolerance with tight dimensional controls on bore, outside diameter, and width. This guarantees exceptional running accuracy and low vibration levels.
- Material Quality: Constructed from high-grade chrome steel for both rings and balls, providing excellent wear resistance and long service life. The bearing is pre-lubricated for immediate operation.
7018 ACB/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for applications where high speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving machines, and high-frequency motors.
- Robotics: High-accuracy joints and arm assemblies.
- Medical Equipment: Dental handpieces, centrifuges, and imaging devices.
