7206 ACD/P4ATBTD
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7206 ACD/P4ATBTD
Basic Information
System of measurement
Metric
Weight
0.59 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
30 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
62 mm
Outside diameter tolerance
-0.004mm to 0
Width
48 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
13
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
11408 lbf
Radial static load rating
10238 lbf
Limiting speed
100.5 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
Heavy / Class D
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7206 ACD/P4ATBTD Bearing Product Overview & Core Advantages
The 7206 ACD/P4ATBTD is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This bearing is supplied as a triplex back-to-back (TBT) matched set with a Class D heavy preload, making it ideal for machine tool spindles and other high-performance machinery. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high stability, thanks to the optimized 25° contact angle and precision P4A tolerance class. The open design, lubricated for immediate operation, ensures reliable performance within a wide temperature range.
7206 ACD/P4ATBTD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7206 | Basic bearing series, indicating a 30mm bore, 62mm OD, and 48mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Heavy preload (Class D). |
| /P4A | High precision tolerance class (P4A), exceeding ABEC-7 standards for superior running accuracy. |
| TBT | Triplex Back-to-Back arrangement of three bearings in a matched set. |
7206 ACD/P4ATBTD Bearing Structural Features & Performance Benefits
- Exceptional Rigidity and Stability: The triplex back-to-back (TBT) arrangement with a heavy preload creates an extremely rigid bearing system, minimizing deflection under load and ensuring precise shaft positioning, which is critical for high-speed and high-accuracy applications.
- Superior Load Capacity: The 25° contact angle and chrome steel construction enable high radial dynamic load rating (11408 lbf) and static load rating (10238 lbf), effectively managing combined loads.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, contributing to a high limiting speed of 100,500 rpm. The open design allows for efficient lubrication management.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, ensuring smooth, quiet operation and minimal runout.
7206 ACD/P4ATBTD Bearing Typical Application Areas
This bearing is specifically engineered for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: For PCB drilling, engraving, and other high-accuracy machining processes.
- High-Frequency Motors: Spindles in applications requiring rapid acceleration and deceleration.
- Robotic Drives: High-accuracy joints and arm actuators.
