7018 ACD/P4AQBCC
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7018 ACD/P4AQBCC
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
Quadruplex Back-to-Back (QBC)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
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
Price available upon request.
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7018 ACD/P4AQBCC Bearing Product Overview & Core Advantages
The 7018 ACD/P4AQBCC is a high-precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and load capacity. This P4A tolerance class metric bearing features a back-to-back quadruplex (QBC) matched arrangement, enabling it to withstand significant combined radial and axial loads from multiple directions. With a moderate preload (Class C) and a 25° contact angle, it delivers outstanding operational stability and rotational accuracy, making it ideal for high-rigidity, high-speed spindle systems.
7018 ACD/P4AQBCC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| ACD | 25° Contact Angle | Optimized for handling substantial axial loads in combination with radial loads. |
| P4A | High Precision Tolerance Class | Guarantees extremely tight dimensional and running accuracy for superior performance in precision machinery. |
| QBCC | Quadruplex Back-to-Back (QBC) Matched Set, Class C Preload | Four bearings are precision-matched and preloaded as a set, providing maximum system rigidity and defined running characteristics. |
7018 ACD/P4AQBCC Bearing Structural Features & Performance Benefits
- Exceptional Rigidity & Load Capacity: The quadruplex back-to-back arrangement creates an extremely stiff bearing system capable of handling high combined loads and moments. With a radial dynamic load rating of 44,775 lbf and a static rating of 65,250 lbf, it is built for heavy-duty performance.
- Optimized for Precision & Speed: The phenolic cage contributes to smooth operation at high speeds, supporting a limiting speed of 15,000 rpm. The P4A precision ensures minimal runout and vibration.
- Robust Material Construction: Manufactured from chrome steel for both rings and balls, the bearing offers high durability and fatigue resistance. The set includes 20 balls with a diameter of 15.875 mm for optimal load distribution.
- Pre-Configured for Ease of Use: Supplied as a lubricated and preloaded matched set of 4 bearings, it simplifies installation and ensures consistent, reliable performance right from the start.
7018 ACD/P4AQBCC Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, rigidity, and speed are critical. Key industries and machinery include:
- High-Speed Machine Tool Spindles (e.g., for milling, grinding, and turning centers)
- Precision Gearboxes and Industrial Pumps
- High-Rigidity Positioning Systems and Robotic Arms
- Advanced Aerospace & Defense Actuation Systems
