7210 ACD/P4ADBB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7210 ACD/P4ADBB
Basic Information
System of measurement
Metric
Weight
0.92 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
40 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
15502 lbf
Radial static load rating
14738 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
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
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In Stock
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Product Overview and Core Advantages
The 7210 ACD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rigidity and accuracy. This matched back-to-back (DB) arrangement provides superior stability and can accommodate combined radial and axial loads from both directions. Manufactured to P4A tolerance class, it ensures high running accuracy and is pre-lubricated for immediate use. Its compact design and high rigidity make it ideal for high-speed, high-precision machinery where reliable performance is critical.
7210 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle, optimized for combined loads. |
| P4A | High precision tolerance class exceeding ABEC 7, ensuring minimal runout and vibration. |
| DB | Duplex Back-to-Back arrangement, providing high moment rigidity and preload (Light / Class B). |
Structural Features and Performance Benefits
- High Rigidity and Stability: The back-to-back duplex design significantly increases system rigidity, effectively resisting moment loads and maintaining shaft alignment under demanding conditions.
- Superior Load Capacity: With a 25° contact angle and duplex setup, this bearing is engineered to handle significant combined radial and axial loads from both directions simultaneously.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 46,000 rpm. The open design allows for efficient lubrication management.
- Precision Engineering: Manufactured to P4A tolerance standards with tight dimensional controls on the bore diameter, outside diameter, and width, guaranteeing consistent, high-precision operation.
7210 ACD/P4ADBB Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles for CNC milling and turning centers
- High-speed Precision Grinding Spindles
- Rotary tables and indexing heads
- High-frequency Spindle Motors
- Other precision machinery requiring high rigidity, speed, and accuracy
