7218 CD/P4ADGA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7218 CD/P4ADGA
Basic Information
System of measurement
Metric
Weight
4.53 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
160 mm
Outside diameter tolerance
-0.004mm to 0
Width
60 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
22.225 mm
Ball quantity
16
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
46800 lbf
Radial static load rating
50400 lbf
Limiting speed
17 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:
$ 602.94
/ each
In Stock
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7218 CD/P4ADGA Bearing Product Overview & Core Advantages
The 7218 CD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-loaded duplex set, it is engineered to handle combined radial and axial loads simultaneously. Its P4A tolerance class and extra light preload (Class A) ensure smooth, high-precision operation, making it an ideal choice for high-speed spindles and other critical machinery where uncompromising performance is required.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7218 | Basic bearing series and size designation (90mm bore, 160mm OD). |
| C | 15° contact angle. |
| D | Indicates a duplex pair of bearings. |
| P4A | High precision tolerance class (superior to ABEC 7). |
| DGA | Universal Matchable (SU) arrangement. The bearings can be mounted in tandem, back-to-back, or face-to-face configurations to achieve the desired rigidity and load capacity. |
7218 CD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex pair (DB/DF/DT) configuration and 15° contact angle provide superior stiffness, enabling the bearing set to withstand significant combined loads and moment loads.
- Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional runouts, this bearing ensures minimal vibration and exceptional running accuracy for high-speed applications.
- Optimized High-Speed Operation: The lightweight phenolic resin cage and optimized internal geometry contribute to lower centrifugal forces and stable operation at the high limiting speed of 17,000 rpm.
- Universal Matchability (SU): This feature offers unparalleled flexibility in mounting. The two bearings are manufactured to be universally matchable, allowing for simplified assembly and optimal performance in various preload and arrangement configurations to meet specific application requirements.
7218 CD/P4ADGA Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance machinery, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Aerospace & Defense Positioning Systems
