7213 CD/P4ADBA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7213 CD/P4ADBA
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
Extra light / Class A
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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7213 CD/P4ADBA Bearing Product Overview & Core Advantages
The 7213 CD/P4ADBA is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. This matched back-to-back (DB) arrangement is preloaded to Extra Light (Class A) specifications, ensuring high running accuracy, minimal axial and radial runout, and superior system stiffness. It is engineered to handle combined loads (simultaneous radial and axial loads) efficiently, making it an ideal choice for high-precision spindles and other critical machinery components where high rigidity and positional accuracy are paramount.
7213 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7213 | Basic bearing series, indicating a bore diameter of 65 mm, outside diameter of 120 mm, and width of 46 mm. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and handling axial loads. |
| D | Indicates the bearing is part of a Duplex (matched) set. |
| P4A | Denotes a high precision tolerance class (superior to ABEC 7), ensuring extremely tight dimensional and running accuracy. |
| DB | Specifies the Back-to-Back mounting arrangement of the duplex pair, which provides high moment rigidity. |
| A | Indicates the Extra Light preload level, minimizing friction and heat generation for high-speed applications. |
7213 CD/P4ADBA Bearing Structural Features & Performance Benefits
- Superior Rigidity and Stability: The duplex back-to-back (DB) design creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring exceptional operational stability.
- High-Precision Performance: Manufactured to P4A tolerance class with an Extra Light preload, this bearing delivers extremely low runout and high rotational accuracy, which is critical for precision machining and instrumentation.
- Optimized for High Speeds: The 15° contact angle and phenolic resin cage reduce centrifugal forces and friction, enabling a high limiting speed of 32,500 rpm. The open design allows for efficient lubrication management.
- High Load Capacity: With a dynamic load rating of 24,300 lbf and a static load rating of 23,850 lbf, this bearing is capable of handling significant combined radial and axial loads.
- Premium Material Construction: Manufactured from chrome steel for both rings and balls, ensuring high durability, wear resistance, and long service life under demanding conditions.
7213 CD/P4ADBA Bearing Typical Application Areas
This precision duplex bearing is ideally suited for applications requiring high speed, high rigidity, and extreme accuracy, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: Used in PCB drilling, precision grinding, and other high-accuracy machining operations.
- High-Frequency Motors: Spindles for routers and other high-speed electric motors.
- Medical and Laboratory Equipment: Centrifuges and other precision instruments.
- Robotics: High-precision joints and arm assemblies.
