7011 CD/P4ADFA
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7011 CD/P4ADFA
Basic Information
System of measurement
Metric
Weight
0.76 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
36 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
18
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
14332 lbf
Radial static load rating
14738 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Face-to-Face (DF)
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
Price available upon request.
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7011 CD/P4ADFA Bearing Product Overview & Core Advantages
The 7011 CD/P4ADFA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. As a duplex face-to-face (DF) matched set, it is pre-configured to provide superior system stability and handle combined loads—significant radial and bidirectional axial loads simultaneously. Manufactured to the exacting P4A tolerance class, this bearing ensures ultra-precise running accuracy, making it an ideal choice for high-performance spindles and other high-speed, high-rigidity applications. Its extra light preload (Class A) minimizes deflection under operational stresses, contributing to enhanced machine tool performance and longevity.
7011 CD/P4ADFA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Indicates a duplex face-to-face (DF) matched pair. This arrangement provides high rigidity and is particularly effective for applications with overturning moments. |
| P4A | Denotes a super-precision tolerance class. This ensures extremely tight dimensional and running accuracy, exceeding standard P4 levels for superior performance. |
| DF | Reinforces the face-to-face mounting of the duplex pair. |
| A | Specifies the extra light preload applied to the matched set, optimizing it for high-speed operation with minimal friction and heat generation. |
7011 CD/P4ADFA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex face-to-face (DF) design creates a robust, pre-stressed system that delivers exceptional high rigidity, effectively resisting operational deflection. With a 15° contact angle, it is engineered to support substantial combined radial and axial loads from both directions.
- High-Speed Performance: The phenolic resin cage is lightweight and possesses excellent sliding properties, which is critical for maintaining stability and reducing centrifugal forces at the high limiting speed of 34,000 rpm. The bearing comes pre-lubricated for immediate operation.
- Precision & Accuracy: Manufactured to P4A super-precision standards with tight bore, outside diameter, and width tolerances, this bearing guarantees minimal runout and vibration, which is paramount for achieving superior surface finishes and machining accuracy.
- Material Integrity: Constructed from chrome steel for both rings and balls, the bearing offers high fatigue resistance and durability, ensuring a long operational life under demanding conditions.
7011 CD/P4ADFA Bearing Typical Application Areas
This precision bearing is specifically engineered for high-end machinery where accuracy and speed are critical. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: Used in PCB drilling, engraving, and other high-precision machining equipment.
- High-Frequency Motors: Spindles for routers and other high-RPM applications.
- Medical Equipment: High-speed rotors in centrifuges and dental handpieces.
