7011 ACD/P4ATBTB
7000 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7011 ACD/P4ATBTB
Basic Information
System of measurement
Metric
Weight
1.13 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
54 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
18135 lbf
Radial static load rating
20925 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
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
Price:
$ 338.85
/ each
In Stock
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7011 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The 7011 ACD/P4ATBTB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This triplex back-to-back (TBT) matched set delivers superior performance under combined loads, handling significant radial and axial forces simultaneously. Manufactured to P4A tolerance class with a light preload (Class B), it ensures minimal runout and stable rotational accuracy, making it ideal for high-speed spindles and other precision machinery where high rigidity and reliability are paramount.
7011 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
The model number 7011 ACD/P4ATBTB breaks down as follows:
- 7011: Basic bearing series, indicating a 55mm bore, 90mm OD, and 54mm width.
- ACD: Angular Contact design with a 25° contact angle.
- P4A: Indicates a high-precision tolerance class exceeding ABEC 7 standards.
- TBT: Denotes a Triplex Back-to-Back matched arrangement of three bearings.
- B: Specifies a Light Preload (Class B) for reduced deflection and enhanced stiffness.
7011 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The triplex back-to-back (TBT) arrangement creates an extremely rigid bearing system capable of withstanding heavy combined loads and moments. The 25° contact angle is optimized for supporting substantial axial loads in both directions.
- Precision & High-Speed Performance: Built to P4A tolerance class with a phenolic cage, this bearing ensures smooth operation and dimensional stability at high rotational speeds, with a limiting speed of 34,000 rpm.
- Optimized Internal Geometry: Features 18 precision balls made of chrome steel with an 11.112 mm diameter, contributing to high dynamic load capacity (18,135 lbf) and long service life.
- Preloaded for Immediate Performance: The light preload (Class B) eliminates internal clearance, reducing vibration and improving positional accuracy from startup without requiring adjustment.
7011 ACD/P4ATBTB Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and rotary actuators requiring high rigidity.
- High-Frequency Spindles: PCB drilling and routing machines.
- Medical Equipment: High-speed dental handpieces and imaging scanner rotors.
- Aerospace Actuators: Flight control systems and auxiliary power units.
