7211 ACD/P4ADGA
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/P4ADGA
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
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
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:
$ 183.19
/ each
In Stock
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7211 ACD/P4ADGA Bearing Product Overview & Core Advantages
The 7211 ACD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing, it can be paired with another identical bearing in various configurations to optimize preload and performance. Its P4A tolerance class ensures ultra-precise dimensions and running accuracy, making it ideal for high-speed spindles and other high-precision machinery. The bearing is capable of supporting combined loads (radial and axial) simultaneously, with its 25° contact angle providing excellent axial load capacity.
7211 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle. |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards, with specific focus on running accuracy. |
| DGA | Universal Matchable (SU) bearing, supplied as a set of two bearings (matched set) for optimized performance in pairs. |
7211 ACD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on the bore, outside diameter, and width. This ensures minimal runout and superior stability in the application.
- Optimized Load Capacity: The 25° contact angle and robust construction using chrome steel rings and balls provide high resistance to combined loads.
- High-Speed Capability: The lightweight phenolic cage reduces centrifugal forces, contributing to a high limiting speed of 34,000 rpm. The open design allows for efficient lubrication management.
- Universal Matching (SU): As a universal matchable bearing, it offers flexibility in mounting arrangements (back-to-back, face-to-face, or tandem) to achieve the desired preload (Extra light / Class A in this case) and system stiffness without selective grinding.
7211 ACD/P4ADGA Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision and speed are critical. Key sectors include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and rotary units requiring high accuracy and rigidity.
- High-Frequency Motors and Spindles: Applications in PCB drilling, dental handpieces, and small tool spindles.
- Medical and Laboratory Equipment: Centrifuges and other precision rotary devices.
