7011 CD/P4ADBB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7011 CD/P4ADBB
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 Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Light / Class B
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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7011 CD/P4ADBB Bearing Product Overview & Core Advantages
The 7011 CD/P4ADBB is a precision angular contact ball bearing configured as a duplex back-to-back (DB) pair with a light preload (Class B). Engineered to the exacting P4A tolerance class, it delivers exceptional rotational accuracy and stability. This matched set is specifically designed to handle combined loads—significant radial loads and axial loads in both directions—simultaneously, making it an ideal solution for applications demanding high rigidity and precise shaft positioning. Its phenolic cage and optimized design contribute to superior high-speed performance.
7011 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7011 | Basic bearing series, defining the standard boundary dimensions: 55 mm bore, 90 mm outside diameter, 36 mm width. |
| C | Specifies a 15° contact angle, optimized for handling high axial loads. |
| D | Indicates the bearing is part of a duplex pair. |
| P4A | Denotes an ultra-high precision tolerance class, exceeding ABEC 7/ISO P4 standards, for applications requiring minimal runout and vibration. |
| DB | Specifies the Back-to-Back mounting arrangement. This configuration provides high moment rigidity and excellent stability. |
| B | Indicates a Light Preload is applied to the matched set, minimizing axial and radial play for enhanced stiffness without excessive heat generation. |
7011 CD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide, stable support system that significantly increases moment stiffness. This allows the bearing set to effectively manage combined radial and axial loads from both directions, ensuring precise shaft location under demanding conditions.
- Precision & High-Speed Performance: Manufactured to P4A tolerance class with a phenolic resin cage, this bearing achieves exceptional running accuracy. The lightweight cage and optimized internal geometry are key to achieving a high limiting speed, making it suitable for demanding spindle applications.
- Optimized Internal Geometry: Featuring a 15° contact angle and precisely sized balls, the design offers an ideal balance between axial load capacity and speed capability.
- Preloaded Matched Set: The two bearings are universally matched and pre-ground to a light preload (Class B). This eliminates internal clearance, providing immediate high stiffness and reducing vibration from the moment of installation, simplifying assembly and ensuring consistent performance.
7011 CD/P4ADBB Bearing Typical Application Areas
The 7011 CD/P4ADBB is engineered for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes and High-Frequency Motor Spindles.
- Industrial Pumps and Compressors requiring precise shaft control.
- Robotic Arm Joints and Rotary Tables.
- Aerospace Actuation Systems and Medical Equipment spindles.
