7011 ACD/P4AQBTB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7011 ACD/P4AQBTB
Basic Information
System of measurement
Metric
Weight
1.51 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
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
18
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
22388 lbf
Radial static load rating
28125 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Quadruplex Tandem Back-to-Back (QBT)
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 ACD/P4AQBTB Bearing Product Overview & Core Advantages
The 7011 ACD/P4AQBTB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This quadruplex matched set, arranged in a Tandem Back-to-Back (QBT) configuration, is engineered to handle significant combined loads (radial and axial) simultaneously. Manufactured to a P4A tolerance class and featuring a light preload (Class B), it delivers superior rotational accuracy and stability, making it ideal for high-precision, high-rigidity systems such as machine tool spindles.
7011 ACD/P4AQBTB Bearing Model Code Explained, Specifications & Naming Convention
The model number 7011 ACD/P4AQBTB provides detailed technical specifications:
- 7011: Basic bearing series, indicating a 55mm bore, 90mm OD, and 72mm width.
- ACD: Angular Contact design with a 25° contact angle.
- P4A: High-Precision Tolerance Class, denoting extremely tight dimensional and running accuracy.
- QBTB: Quadruplex (4 bearings) set in a Tandem Back-to-Back arrangement for maximum axial and moment load capacity.
7011 ACD/P4AQBTB Bearing Structural Features & Performance Benefits
- Exceptional Rigidity & Load Capacity: The quadruplex QBTB matched arrangement creates an extremely rigid bearing system capable of supporting heavy combined radial and axial loads and resisting moment loads, ensuring minimal deflection under operation.
- High-Precision Performance: Built to P4A tolerance class with a light preload, this bearing guarantees minimal runout and vibration, which is critical for maintaining precision in high-speed applications.
- Optimized for High-Speed Operation: The phenolic cage offers low weight and excellent performance at high rotational speeds, contributing to the bearing's high limiting speed of 34,000 rpm.
- Premium Material Construction: Manufactured from chrome steel for both rings and balls, ensuring high durability, wear resistance, and a long operational lifespan.
7011 ACD/P4AQBTB Bearing Typical Application Areas
This high-precision quadruplex bearing set is specifically designed for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring utmost rigidity and accuracy.
- Precision Gearboxes and High-Speed Drives.
- Industrial Pumps and Compressors that operate under high loads and speeds.
- Advanced Robotics and Automation Equipment.
