7018 ACD/P4ADGA
7000 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7018 ACD/P4ADGA
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
Universal Matchable (SU)
Number of bearings in matched set
2
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
Price:
$ 515.75
/ each
In Stock
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7018 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 7018 ACD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Operating as a universal matchable (SU) bearing, it can be paired with another identical bearing in a back-to-back (DB) or face-to-face (DF) arrangement to form a pre-loaded set, optimizing system stiffness and rotational accuracy. Its P4A tolerance class ensures ultra-precise running dimensions, making it ideal for high-speed spindles and other high-precision machinery.
7018 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| A | Signifies a 25° contact angle, providing an optimal balance between radial and axial load capacity. |
| CD | Indicates a Universal Matchable (SU) design. Two bearings can be universally paired to achieve a specific preload without selective mounting. |
| P4A | Denotes an ultra-high precision tolerance class with even tighter specifications than standard P4, ensuring minimal runout and vibration. |
| DGA | Specifies the preload level, in this case, Extra Light (Class A). This minimizes friction and heat generation, making it suitable for very high-speed applications. |
7018 ACD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and the ability to be mounted in a pre-loaded pair enable the bearing to withstand significant combined radial and axial loads simultaneously, providing exceptional system stability.
- Superior High-Speed Performance: The combination of an Extra Light preload (DGA) and a lightweight, robust phenolic resin cage minimizes centrifugal forces and friction, allowing for a high limiting speed of 16,000 rpm.
- Ultra-Precision Operation: Manufactured to P4A tolerance class with a 25° contact angle, this bearing guarantees extremely precise shaft guidance and low running noise, which is critical for applications like machine tool spindles.
- Optimized Material Selection: The use of high-grade chrome steel for rings and balls ensures high durability and fatigue life, while the phenolic cage is suitable for high-speed operation and is compatible with a wide temperature range.
7018 ACD/P4ADGA Bearing Typical Application Areas
The 7018 ACD/P4ADGA is engineered for the most demanding precision applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Internal and external grinding machines.
- High-Frequency Motors: Spindles for PCB drilling and routing.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
