7011 CD/P4ADT
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7011 CD/P4ADT
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 Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Available
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/P4ADT Bearing Product Overview & Core Advantages
The 7011 CD/P4ADT is a precision angular contact ball bearing supplied as a duplex tandem (DT) matched set. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing is preloaded and manufactured to P4A tolerance class for superior running precision. Its primary advantage lies in its ability to handle combined loads—significant radial and unidirectional axial loads—simultaneously, making it an ideal choice for high-speed, high-rigidity spindles and precision machinery.
7011 CD/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7011 | Basic bearing series and size designation (55mm bore, 90mm OD). |
| C | Designates a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| D | Indicates the bearing is part of a duplex tandem (DT) preloaded set. |
| P4A | Specifies a high-precision tolerance class exceeding ABEC 7 standards, ensuring minimal runout and vibration. |
| Open | The bearing is supplied without seals or shields, allowing for customized lubrication systems to achieve maximum limiting speed. |
7011 CD/P4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex tandem arrangement combines two bearings to provide exceptional system stiffness and increased axial load capacity in one direction, crucial for resisting deflection under heavy combined loads.
- Precision & High-Speed Performance: Manufactured to P4A tolerance class with a 15° contact angle and a lightweight phenolic cage, this bearing is engineered for smooth operation at high rotational speeds (up to 34,000 rpm), minimizing friction and heat generation.
- Optimized Internal Geometry: The bearing features 18 high-precision chrome steel balls, contributing to its high dynamic and static load ratings of 14,332 lbf and 14,738 lbf respectively, ensuring long service life under demanding conditions.
- Preloaded Configuration: Supplied as a preloaded set, the bearing eliminates internal clearance, providing immediate precision and eliminating the need for complex adjustment during installation.
7011 CD/P4ADT Bearing Typical Application Areas
This precision angular contact ball bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, high-frequency motor spindles.
- Industrial Pumps & Compressors: Where high axial loads and speeds are present.
