7018 ACD/P4ATGA
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7018 ACD/P4ATGA
Basic Information
System of measurement
Metric
Weight
3.47 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
72 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
36675 lbf
Radial static load rating
48600 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
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 ACD/P4ATGA Bearing Product Overview & Core Advantages
The 7018 ACD/P4ATGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to a P4A tolerance class, it is ideally suited for high-speed spindles and other precision machinery. Its defining feature is the Universal Matchable (SU) design, allowing bearings to be supplied in pre-matched sets for optimal performance. This bearing is capable of supporting combined loads (radial and axial) simultaneously, with a 25° contact angle providing excellent axial load capacity. The phenolic cage and superior manufacturing ensure reliable operation at high speeds.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7018 | Basic bearing series and size designation (90mm bore, 140mm OD). |
| ACD | Angular Contact Design with a 25° contact angle. |
| P4A | High precision tolerance class, specifying extremely tight dimensional and running accuracy. |
| TGA | Indicates a Universal Matchable (SU) bearing, supplied in a pre-set combination for simplified installation and optimal rigidity. |
7018 ACD/P4ATGA Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4A tolerance class with a phenolic cage, this bearing ensures minimal runout and vibration, which is critical for maintaining machining accuracy in high-speed applications.
- Superior Load Capacity: The 25° contact angle is optimized to handle significant combined radial and axial loads, providing stable performance under demanding conditions.
- Optimized for High-Speed Operation: The lightweight phenolic cage reduces centrifugal forces, contributing to a high limiting speed of 15,000 rpm. The open design allows for efficient lubrication management.
- Universal Matching (SU): Bearings are supplied in pre-matched sets (typically 3 bearings), ensuring uniform load distribution and simplified assembly, which directly enhances system stiffness and accuracy.
7018 ACD/P4ATGA Bearing Typical Application Areas
This precision angular contact ball bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications requiring extreme rotational accuracy and minimal thermal growth.
- High-Frequency Motors and Spindles: Where high rotational speeds and rigidity are paramount.
- Other Precision Rotary Equipment: Such as high-speed compressors and specialized test and measurement apparatus.
