7206 CD/P4ADBB
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7206 CD/P4ADBB
Basic Information
System of measurement
Metric
Weight
0.39 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
32 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
13
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
8932 lbf
Radial static load rating
7200 lbf
Limiting speed
71.5 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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7206 CD/P4ADBB Bearing Product Overview & Core Advantages
The 7206 CD/P4ADBB is a precision duplex angular contact ball bearing configured in a back-to-back (DB) arrangement. This matched pair is designed for applications requiring exceptional rotational accuracy, high rigidity, and the ability to support combined loads (radial and axial). With a P4A tolerance class and a light preload (Class B), it delivers superior running precision and stability, making it ideal for high-speed spindles and other demanding machinery.
Model Code Breakdown
The model number 7206 CD/P4ADBB is decoded as follows:
- 7206: Basic bearing designation (30mm bore, 62mm OD, 32mm width).
- C: Denotes a 15° contact angle, optimized for high-speed operation.
- D: Indicates the bearing is part of a duplex pair.
- P4A: Specifies the ultra-precision tolerance class, exceeding ABEC 7 standards for runout and dimensional accuracy.
- DB: Signifies the back-to-back mounting arrangement, which provides high moment rigidity and accommodates axial loads from both directions.
- B: Indicates the light preload (Class B) applied to the matched set, reducing deflection and improving system stiffness.
7206 CD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) configuration creates a wide effective spread, significantly increasing the bearing's resistance to moment loads and enhancing overall system rigidity.
- Superior Load Capacity: Engineered to handle combined radial and axial loads simultaneously. The 15° contact angle is ideal for applications with significant axial loads.
- High-Speed Performance: The lightweight phenolic resin cage ensures smooth operation and reduced centrifugal forces, contributing to a high limiting speed of 71,500 rpm. The open design facilitates efficient lubrication management.
- Precision Operation: Manufactured to P4A tolerance class with a light preload, this bearing set guarantees minimal runout and exceptional rotational accuracy for the most demanding applications.
7206 CD/P4ADBB Bearing Typical Application Areas
This precision bearing set is typically specified for high-performance machinery where accuracy, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles
- High-Frequency Machining Centers
- Precision Grinding Spindles
- High-Speed Pumps and Compressors
- Advanced Robotics and Automation Systems
