7213 ACD/P4ADBD
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7213 ACD/P4ADBD
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
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
23400 lbf
Radial static load rating
22950 lbf
Limiting speed
36 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
Heavy / Class D
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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7213 ACD/P4ADBD Bearing Product Overview & Core Advantages
The 7213 ACD/P4ADBD is a precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. This matched back-to-back (DB) arrangement is preloaded to Heavy (Class D) specifications, providing superior stiffness and minimal axial/radial runout. It excels at handling combined loads (radial and axial) simultaneously, making it ideal for high-precision, high-reliability machinery where rotational accuracy and system stability are paramount.
7213 ACD/P4ADBD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7213 | Basic bearing series, indicating a 65mm bore, 120mm OD, and 46mm width. |
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Duplex (two single bearings) arrangement. |
| DB | Back-to-Back mounting. This configuration provides high moment rigidity. |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards, ensuring extremely tight dimensional and running accuracy. |
7213 ACD/P4ADBD Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The back-to-back duplex design with a Heavy preload creates a highly rigid bearing system that effectively resists moment loads and minimizes deflection under operation, crucial for maintaining precision.
- Superior Load Capacity: Engineered with a 25° contact angle and chrome steel components, this bearing offers a high dynamic load rating of 23,400 lbf and static load rating of 22,950 lbf, enabling reliable performance under significant combined loads.
- Optimized High-Speed Performance: The lightweight, durable phenolic resin cage minimizes centrifugal forces and ensures stable operation, contributing to the bearing's high limiting speed of 36,000 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with extremely tight bore, OD, and width tolerances, this bearing guarantees exceptional running accuracy and is supplied pre-lubricated for immediate use.
7213 ACD/P4ADBD Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications including:
- Machine Tool Spindles (e.g., milling, grinding, and turning centers)
- High-speed Precision Gearboxes
- Industrial Pumps and Compressors
- Robotic Arm and Automation System Axes
- Medical and Laboratory Precision Equipment
