7214 ACD/P4ADFA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7214 ACD/P4ADFA
Basic Information
System of measurement
Metric
Weight
2.22 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
70 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
125 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
16
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
24300 lbf
Radial static load rating
24750 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Face-to-Face (DF)
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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7214 ACD/P4ADFA Bearing Product Overview & Core Advantages
The 7214 ACD/P4ADFA is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This matched set features a Face-to-Face (DF) arrangement and an Extra Light (Class A) preload, making it ideal for high-precision spindles and other machinery where minimal deflection under load is critical. Its P4A tolerance class ensures superior running accuracy, while the 25° contact angle provides excellent capacity for combined radial and axial loads. This configuration offers superior system rigidity and positional accuracy in demanding operational environments.
7214 ACD/P4ADFA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Technical Meaning |
|---|---|
| ACD | Angular Contact, Duplex arrangement. Indicates the bearing is supplied as a matched pair. |
| P4A | Specifies a high-precision tolerance class exceeding ABEC 7 (ISO Class 4) standards, ensuring extremely tight dimensional and running accuracy. |
| DF | Duplex Face-to-Face arrangement. This configuration provides high rigidity and is particularly effective in withstanding moment loads. |
| A | Denotes an Extra Light preload applied to the matched set, which minimizes friction and heat generation for high-speed operation while maintaining system stiffness. |
7214 ACD/P4ADFA Bearing Structural Features & Performance Benefits
- High Rigidity & System Stability: The duplex DF arrangement creates a highly rigid bearing system that significantly reduces axial and radial runout, making it indispensable for machine tool spindles and other high-precision applications.
- Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 24,300 lbf, this bearing is engineered to handle significant combined radial and axial loads simultaneously.
- Optimized High-Speed Performance: The combination of a lightweight phenolic cage, an extra light preload, and a limiting speed of 28,000 rpm ensures stable and reliable performance at high rotational velocities.
- Precision Engineering: Manufactured to P4A tolerance class with tight bore, outside diameter, and width tolerances, this bearing guarantees exceptional running accuracy and consistent performance.
7214 ACD/P4ADFA Bearing Typical Application Areas
This precision duplex bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles (CNC milling, grinding, and turning centers)
- High-Frequency Motors
- Precision Gearboxes
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Rotary Axes
