7011 CE/P4AQBCB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7011 CE/P4AQBCB
Basic Information
System of measurement
Metric
Weight
1.57 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
72 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
24
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
9945 lbf
Radial static load rating
11025 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Quadruplex Back-to-Back (QBC)
Number of bearings in matched set
4
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 CE/P4AQBCB Bearing Product Overview & Core Advantages
The 7011 CE/P4AQBCB is a precision angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. This matched quadruplex set in a back-to-back (QBC) arrangement is engineered to handle combined loads—significant radial and axial loads in both directions—simultaneously. Its P4A tolerance class ensures ultra-precision operation, making it ideal for high-speed, high-rigidity spindles and other critical machinery where positioning accuracy is paramount.
7011 CE/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
The model number 7011 CE/P4AQBCB breaks down as follows:
- 7011: Basic series designation, indicating a 55mm bore, 90mm OD, and 72mm width.
- C: Denotes a 15° contact angle, optimized for high-speed operation.
- E: Indicates an optimized internal design for enhanced performance.
- P4A: Specifies the tolerance class, representing very high precision for bore diameter, outer diameter, and width.
- QBCB: Defines the matched arrangement:
- Q: Quadruplex set (4 bearings).
- BC: Back-to-Back mounting, providing high moment rigidity.
- B: Indicates a Light preload (Class B) for reduced deflection and precise shaft positioning.
7011 CE/P4AQBCB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The back-to-back quadruplex arrangement creates an extremely rigid bearing system capable of withstanding heavy combined radial and axial loads from both directions, as well as high overturning moments.
- Precision & High-Speed Performance: Manufactured to a P4A tolerance class and featuring a phenolic resin cage, this bearing ensures smooth, quiet, and stable operation at high rotational speeds, with a limiting speed of 34,000 rpm.
- Optimized Internal Geometry: The 15° contact angle and optimized internal design (suffix E) reduce heat generation and are ideal for high-speed applications.
- Preloaded Set: The light preload (Class B) eliminates internal clearance, increases system stiffness, and improves rotational accuracy, which is critical for machine tool spindles.
7011 CE/P4AQBCB Bearing Typical Application Areas
This high-precision bearing set is specifically designed for the most demanding applications, including:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Machining Centers
- Other Precision Rotary Equipment requiring maximum rigidity and accuracy
