7210 ACD/P4AQBTB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7210 ACD/P4AQBTB
Basic Information
System of measurement
Metric
Weight
1.85 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
80 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
25200 lbf
Radial static load rating
29025 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Quadruplex Tandem Back-to-Back (QBT)
Number of bearings in matched set
4
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
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7210 ACD/P4AQBTB Bearing Product Overview & Core Advantages
The 7210 ACD/P4AQBTB is a precision angular contact ball bearing configured as a Quadruplex Tandem Back-to-Back (QBT) matched set. Engineered to the exacting P4A tolerance class, this bearing delivers exceptional rotational accuracy and dimensional stability. Its primary advantage lies in its optimized design for handling combined loads, particularly heavy thrust loads in both directions, while maintaining high rigidity and stable operation at elevated speeds. The matched set configuration ensures pre-defined preload (Light / Class B), providing consistent performance and simplifying installation in demanding applications.
7210 ACD/P4AQBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7210 | Basic bearing series; 50 mm bore, 90 mm OD, 80 mm width. |
| ACD | Angular Contact design with a 25° contact angle. |
| P4A | Indicates high precision tolerance class (superior to ABEC 7). |
| QBTB | Specifies a Quadruplex (4 bearings) Tandem Back-to-Back matched arrangement. |
7210 ACD/P4AQBTB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The Quadruplex Tandem Back-to-Back (QBT) arrangement creates an exceptionally stiff bearing system capable of withstanding heavy combined radial and axial loads from both directions. The 25° contact angle is optimized for high thrust capacity.
- Precision & Speed Performance: Manufactured to P4A tolerance class for minimal runout and vibration. The phenolic cage and optimized internal geometry contribute to a high limiting speed of 46,000 rpm, making it suitable for high-speed applications.
- Superior Material & Construction: Components are manufactured from chrome steel for high durability and fatigue resistance. The set is supplied pre-lubricated and ready for installation.
- Preloaded Matched Set: The four bearings are supplied as a factory-matched set with a Light (Class B) preload, ensuring immediate, precise performance without the need for complex on-site adjustment.
7210 ACD/P4AQBTB Bearing Typical Application Areas
This bearing is engineered for high-performance machinery requiring extreme precision, rigidity, and speed. Key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Spindles: In PCB drilling, semiconductor manufacturing, and other precision machining equipment.
- High-Frequency Motors: Where high rotational accuracy and minimal vibration are critical.
- Robotic Drives: For high-precision articulation and positioning systems.
