7018 CD/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7018 CD/P4ADBA
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
15 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
20
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
28575 lbf
Radial static load rating
34425 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7018 CD/P4ADBA Bearing Product Overview & Core Advantages
The 7018 CD/P4ADBA is a precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and rotational accuracy. This back-to-back (DB) matched set is preloaded to Extra Light / Class A specifications, ensuring minimal axial and radial play for superior performance under combined loads. Manufactured to the stringent P4A tolerance class, it is ideal for high-speed, high-precision machinery requiring reliable operation and long service life.
7018 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Indicates a duplex bearing in a Back-to-Back (DB) arrangement. This configuration provides high moment rigidity and excellent stability. |
| P4A | Denotes a very high precision tolerance class, exceeding ABEC 7 standards, for applications requiring extreme running accuracy. |
| DB | Specifies the matched arrangement as Back-to-Back. (Implied by "CD" and detailed in specifications). |
| A | Specifies the preload level as Extra Light. |
7018 CD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) design creates a wide effective spread, significantly increasing the bearing's resistance to moment loads and providing exceptional system rigidity.
- Superior Load Capacity: The 15° contact angle and duplex construction enable it to handle significant combined radial and axial loads simultaneously.
- Precision & High-Speed Performance: Manufactured to P4A tolerance class with a lightweight, high-strength phenolic cage, this bearing ensures smooth operation and is capable of reaching a limiting speed of 15,000 rpm.
- Optimized Material & Lubrication: Constructed from chrome steel for both rings and balls, offering high durability and fatigue resistance. The bearing is pre-lubricated for immediate operation upon installation.
7018 CD/P4ADBA Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles (e.g., for milling, grinding, and turning centers)
- High-Frequency Motors and Precision Gearboxes
- Industrial Pumps and Compressors
- Aerospace & Defense Positioning Systems
- Medical Equipment requiring high-speed and accuracy
