7211 ACD/P4ADFB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7211 ACD/P4ADFB
Basic Information
System of measurement
Metric
Weight
1.23 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
100 mm
Outside diameter tolerance
-0.004mm to 0
Width
42 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
14.288 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
19170 lbf
Radial static load rating
18338 lbf
Limiting speed
34 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Face-to-Face (DF)
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
Price available upon request.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7211 ACD/P4ADFB Bearing Product Overview & Core Advantages
The 7211 ACD/P4ADFB is a precision duplex angular contact ball bearing configured in a face-to-face (DF) arrangement. Engineered for high-precision applications, this matched pair excels at handling combined radial and axial loads from both directions simultaneously. Its P4A tolerance class and light preload (Class B) ensure exceptional running accuracy and rotational stability, making it ideal for machine tool spindles and other demanding equipment requiring high rigidity and precise axial positioning.
7211 ACD/P4ADFB Bearing Model Code Explained, Specifications & Naming Convention
The model number 7211 ACD/P4ADFB is decoded as follows:
- 7211: Basic series designation, indicating a metric angular contact ball bearing with a 55mm bore, 100mm OD, and 21mm single width.
- AC: Angular Contact design with a 25° contact angle.
- D: Signifies the bearing is part of a Duplex (matched) pair.
- P4A: Denotes a super-precision tolerance class, with enhanced dimensional and running accuracy.
- DF: Specifies the Duplex Face-to-Face mounting arrangement.
- B: Indicates a Light preload is applied to the matched set.
7211 ACD/P4ADFB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex face-to-face (DF) arrangement creates a highly rigid bearing system capable of supporting significant combined loads and moment loads. The 25° contact angle is optimized for carrying substantial axial loads in both directions.
- Precision Performance: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for high-speed and high-precision applications.
- Optimized High-Speed Operation: The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces, reduced friction, and a high limiting speed of 34,000 rpm. The bearings are pre-lubricated for immediate operation.
- Matched Set Consistency: Supplied as a factory-matched pair, the two bearings are precision-ground to work in unison, ensuring optimal load distribution and performance.
7211 ACD/P4ADFB Bearing Typical Application Areas
This bearing is specifically designed for high-performance machinery, including:
- Machine Tool Spindles (milling, grinding, boring)
- High-Frequency Motors
- Precision Gearboxes
- Industrial Pumps and Compressors
- Medical and Laboratory Equipment
