7018 ACD/P4AQGA
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7018 ACD/P4AQGA
Basic Information
System of measurement
Metric
Weight
4.63 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
96 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
44775 lbf
Radial static load rating
65250 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
4
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/P4AQGA Bearing Product Overview & Core Advantages
The 7018 ACD/P4AQGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. Engineered to a P4A tolerance class, it delivers superior running precision. Its universal matchable (SU) design allows for flexible mounting in sets of four to handle combined loads (radial and axial) efficiently. The 25° contact angle and extra light preload (Class A) make it an ideal solution for high-speed operation and high-reliability scenarios where minimal deflection is critical.
7018 ACD/P4AQGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7018 | Basic bearing series, defining the boundary dimensions (90mm bore, 140mm OD, 96mm width). |
| ACD | Angular Contact Design with a 25° contact angle. |
| P4A | Indicates a high-precision tolerance class with enhanced dimensional and running accuracy. |
| QGA | Specifies the universal matchable (SU) arrangement and extra light preload (Class A). |
7018 ACD/P4AQGA Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design and robust construction, featuring a phenolic cage and chrome steel rings and balls, provide high rigidity, enabling it to handle significant radial dynamic load ratings of 44,775 lbf and static load ratings of 65,250 lbf.
- Optimized for High-Speed Performance: The combination of the 25° contact angle, extra light preload, and lightweight phenolic cage contributes to a high limiting speed of 15,000 rpm, minimizing friction and heat generation.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, ensuring predictable performance and precise shaft positioning.
- Universal Matching Capability (SU): Bearings are supplied lubricateduniversally matchable, allowing for simplified installation in pre-determined sets (e.g., duplex pairs or quadruplex sets) to accommodate complex load conditions without selective mounting.
7018 ACD/P4AQGA Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery where precision and speed are paramount. Key applications include:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Aerospace and Defense Actuation Systems
