7211 CD/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7211 CD/P4A
Basic Information
System of measurement
Metric
Weight
0.61 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
55 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
100 mm
Outside diameter tolerance
-0.008mm to 0
Width
21 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
14.288 mm
Ball quantity
15
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
12442 lbf
Radial static load rating
9675 lbf
Limiting speed
22 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
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
Price:
$ 112.69
/ each
In Stock
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7211 CD/P4A Bearing Product Overview & Core Advantages
The 7211 CD/P4A is a single-row angular contact ball bearing designed for applications demanding high precision and superior running accuracy. Engineered to a P4 (ABEC-7) tolerance class, it is ideally suited for high-speed spindles and other precision machinery. Its key advantage lies in its ability to support combined loads—significant radial loads and axial loads in one direction—simultaneously. The optimized 15° contact angle provides an excellent balance between axial load capacity and speed capability. Supplied with factory-applied lubrication, it is ready for immediate installation and operation.
7211 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7211 | Basic bearing designation indicating a metric, single-row angular contact bearing with a 55 mm bore, 100 mm OD, and 21 mm width. |
| CD | Indicates a specific contact angle (15°) and internal design optimized for high rigidity and precise operation. |
| P4A | Denotes a high-precision tolerance class equivalent to ABEC-7. The 'A' suffix specifies tolerance deviations for the outside diameter and width. |
7211 CD/P4A Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4 tolerance class with a phenolic resin cage, this bearing ensures minimal vibration and exceptional running accuracy, which is critical for high-speed applications.
- Optimized Load Capacity: The 15° contact angle and robust construction using chrome steel rings and balls provide a high dynamic load rating of 12,442 lbf and static load rating of 9,675 lbf, enabling reliable performance under combined loads.
- Superior High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, contributing to a high limiting speed of 22,000 rpm. This makes it an excellent choice for machine tool spindles.
- Pre-Lubricated & Ready-to-Use: The bearing comes pre-lubricated from the factory, ensuring optimal performance from the first rotation and simplifying the installation process.
7211 CD/P4A Bearing Typical Application Areas
The 7211 CD/P4A is engineered for high-performance applications where precision and speed are paramount. Its primary uses include:
- Machine Tool Spindles (e.g., milling, grinding, and lathe spindles)
- High-Frequency Motors
- Precision Gearboxes
- Industrial Pumps and Compressors
- Aerospace and Defense Actuation Systems
