7224 CD/P4DBA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7224 CD/P4DBA
Basic Information
System of measurement
Metric
Weight
10.8 kg
Tolerance class
P4
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
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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7224 CD/P4DBA Bearing Product Overview & Core Advantages
The 7224 CD/P4DBA is a precision duplex angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. This back-to-back (DB) matched pair is preloaded to Extra Light (Class A) specifications, delivering superior system stiffness and minimal runout. Its design is optimized to handle combined loads, accommodating significant radial loads and axial loads in both directions simultaneously. Manufactured to P4 tolerance class, this bearing ensures high-precision performance in critical machinery, offering excellent operational reliability and long service life.
7224 CD/P4DBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7224 | Basic bearing series, indicating a 120 mm bore, 215 mm OD, and 80 mm width. |
| C | 15° contact angle, optimized for combined load capacity. |
| D | Duplex bearing (two single bearings paired). |
| P4 | Precision tolerance class for high-accuracy applications. |
| DB | Back-to-Back arrangement, providing high moment rigidity. |
| A | Extra Light preload classification. |
7224 CD/P4DBA Bearing Structural Features & Performance Benefits
- High Rigidity & System Stability: The back-to-back (DB) duplex arrangement creates a wide effective spread between load centers, significantly increasing the bearing system's resistance to moment loads and enhancing overall stiffness.
- Superior Load Capacity: With a 15° contact angle and duplex construction, this bearing excels at supporting combined radial and axial loads from both directions. The dynamic load rating of 73,125 lbf and static load rating of 87,750 lbf ensure robust performance under heavy-duty conditions.
- Precision & High-Speed Operation: Manufactured to P4 tolerance standards with a phenolic cage, this bearing achieves exceptional running accuracy and is capable of operating at high speeds (limiting speed of 10,000 rpm), making it suitable for high-speed spindles.
- Optimized Material & Lubrication: Components made from chrome steel provide high hardness and wear resistance. The bearing is pre-lubricated for immediate operation and reliable performance within a temperature range of -30°C to 110°C.
7224 CD/P4DBA Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles (milling, grinding, and turning centers)
- High-Speed Machining Centers
- Precision Gearboxes
- Industrial Pumps and Compressors
- Medical and Laboratory Equipment
