7213 CD/P4ADBC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7213 CD/P4ADBC
Basic Information
System of measurement
Metric
Weight
2.05 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
65 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
120 mm
Outside diameter tolerance
-0.004mm to 0
Width
46 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
24300 lbf
Radial static load rating
23850 lbf
Limiting speed
32.5 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
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7213 CD/P4ADBC Bearing Product Overview & Core Advantages
The 7213 CD/P4ADBC is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This back-to-back (DB) matched pair is preloaded to Moderate / Class C, delivering superior system stiffness and precise shaft positioning. Engineered to handle combined loads (radial and axial), it is ideal for high-speed spindles and other precision machinery where uncompromising performance is critical. The combination of a phenolic cage and optimized internal geometry enables outstanding high-speed performance.
7213 CD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7213 | Basic bearing designation: 65 mm bore, 120 mm OD, 46 mm width. |
| C | 15° contact angle. |
| D | Duplex (two bearings as a set). |
| DB | Back-to-Back mounting arrangement. |
| P4A | High precision tolerance class (equivalent to ABEC 7). |
7213 CD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Axial Stability: The back-to-back duplex arrangement creates a wide effective spread, significantly increasing moment rigidity and providing excellent resistance to overturning moments, ensuring stable shaft operation under combined loads.
- Optimized High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, reduces friction, and ensures stable operation at the high limiting speed of 32,500 rpm. The 15° contact angle is ideal for high-speed applications requiring good axial load capacity.
- Precision & Accuracy: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, this bearing guarantees minimal runout and superior rotational accuracy for precision spindles.
- Robust Load Capacity: With a high dynamic load rating of 24,300 lbf and static load rating of 23,850 lbf, the bearing is built for long-lasting performance in demanding conditions.
7213 CD/P4ADBC Bearing Typical Application Areas
This bearing is specifically engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines and high-frequency motor spindles.
- Industrial Pumps & Compressors: Applications requiring high rigidity and speed.
- Robotics: High-precision rotary joints and arm actuators.
