7224 CD/P4ADBB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7224 CD/P4ADBB
Basic Information
System of measurement
Metric
Weight
10.8 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
120 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
215 mm
Outside diameter tolerance
-0.004mm to 0
Width
80 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
30.162 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
73125 lbf
Radial static load rating
87750 lbf
Limiting speed
10 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
Light / Class B
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
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7224 CD/P4ADBB Bearing Product Overview & Core Advantages
The 7224 CD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This metric bearing features a back-to-back (DB) matched arrangement and is manufactured to P4A tolerance class, ensuring superior running precision. Its primary advantage lies in its ability to support combined loads (radial and axial) simultaneously, making it ideal for high-precision spindles and other demanding machinery where high rigidity and light preload are critical for performance.
7224 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7224 | Basic bearing series and size designation (Bore: 120 mm, OD: 215 mm, Width: 80 mm). |
| C | Designates a 15° contact angle, optimized for supporting combined loads. |
| D | Indicates the bearing is part of a duplex (matched) set. |
| P4A | Signifies a high precision tolerance class, exceeding standard ABEC 7/ISO P4 levels for enhanced running accuracy. |
| DB | Specifies the back-to-back arrangement of the matched pair, which provides high moment rigidity. |
| B | Denotes a light preload applied to the matched set, minimizing deflection under load while maintaining smooth operation. |
7224 CD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing the bearing's resistance to moment loads and providing exceptional stiffness. This configuration enables it to handle substantial combined radial and axial loads.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width, this bearing ensures minimal runout and vibration for superior accuracy in high-speed applications.
- Optimized High-Speed Operation: The phenolic cage is lightweight and robust, contributing to lower centrifugal forces and stable operation at the limiting speed of 10,000 rpm. The standard lubrication is suitable for the specified temperature range.
- Durable Construction: Components made from chrome steel for both rings and balls offer high wear resistance and long service life under demanding conditions.
7224 CD/P4ADBB Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and Industrial Pumps.
- High-Frequency Motors and Robotic Drives.
- Aerospace Positioning Systems and Medical Imaging Equipment.
