7210 ACD/P4ATBTA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7210 ACD/P4ATBTA
Basic Information
System of measurement
Metric
Weight
1.39 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
60 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
20768 lbf
Radial static load rating
22050 lbf
Limiting speed
46 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
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
In Stock
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7210 ACD/P4ATBTA Bearing Product Overview & Core Advantages
The 7210 ACD/P4ATBTA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched bearing set features a triplex back-to-back arrangement (TBT), providing superior stability and the ability to handle significant combined loads (radial and axial). Manufactured to a P4A tolerance class with an extra light preload (Class A), it is engineered for high-speed operation and optimal performance in precision machinery. Its open design and phenolic cage contribute to its high-speed capabilities.
7210 ACD/P4ATBTA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7210 | Basic bearing series and size code (50mm bore, 90mm OD). |
| ACD | Angular Contact design with a 25° contact angle. |
| P4A | Indicates high precision tolerance class (superior to ABEC 7). |
| TBT | Specifies a Triplex Back-to-Back matched set arrangement. |
| A | Denotes an Extra Light Preload for minimal friction and high-speed operation. |
7210 ACD/P4ATBTA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The triplex back-to-back (TBT) arrangement of three bearings creates an extremely rigid bearing system, effectively resisting complex moment loads and ensuring precise shaft positioning.
- Superior Load Capacity: The 25° contact angle is optimized to handle substantial combined radial and axial loads simultaneously, making it ideal for applications with demanding load conditions.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the open design and factory lubrication allow for efficient operation at a high limiting speed of 46,000 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, ensuring smooth, quiet, and vibration-free operation essential for high-precision applications.
7210 ACD/P4ATBTA Bearing Typical Application Areas
This precision bearing set is ideally suited for:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Gearboxes
- High-Frequency Motors and Spindles
- Industrial Pumps and Compressors
- Aerospace Actuation Systems
