7006 CD/P4AQBCB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7006 CD/P4AQBCB
Basic Information
System of measurement
Metric
Weight
0.45 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
55 mm
Outside diameter tolerance
-0.004mm to 0
Width
52 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
14
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
8482 lbf
Radial static load rating
7200 lbf
Limiting speed
100.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Quadruplex Back-to-Back (QBC)
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
Price available upon request.
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7006 CD/P4AQBCB Bearing Product Overview & Core Advantages
The 7006 CD/P4AQBCB is a precision quadruplex angular contact ball bearing designed for applications demanding exceptional rigidity and rotational accuracy. This matched set arrangement features four bearings in a back-to-back (QBC) configuration, providing superior stability and the ability to withstand combined loads (radial and axial) from multiple directions. Manufactured to P4A tolerance class with a light preload (Class B), it is engineered for high-speed operation and high reliability in the most demanding precision machinery.
7006 CD/P4AQBCB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7006 | Basic bearing series and size designation (30mm bore, 55mm OD). |
| CD | Specifies a duplex pair with specific internal clearance and preload. In this context, it is part of the quadruplex set specification. |
| P4A | Indicates the tolerance class, signifying very high precision levels for both dimensional and running accuracy. |
| QBC | Denotes the arrangement as a Quadruplex Back-to-Back matched set. |
| B | Specifies the Light Preload level (Class B). |
7006 CD/P4AQBCB Bearing Structural Features & Performance Benefits
- Exceptional Rigidity and Stability: The quadruplex back-to-back (QBC) arrangement creates a highly rigid bearing system that effectively resists moment loads and shaft deflection, ensuring precise alignment and minimal runout under heavy combined loads.
- Superior Load Capacity: With four bearings sharing the load, this set offers a high radial dynamic load rating of 8482 lbf and a radial static load rating of 7200 lbf, making it suitable for applications with significant radial and bidirectional axial forces.
- High-Speed Capability: The phenolic cage and optimized internal geometry contribute to low friction and stable operation, supporting a limiting speed of 100,500 rpm. The 15° contact angle provides an excellent balance between axial load capacity and speed performance.
- Precision Engineering: Manufactured to P4A tolerance class with tight bore, outside diameter, and width tolerances, this bearing ensures smooth, quiet, and vibration-free operation, which is critical for high-precision applications.
7006 CD/P4AQBCB Bearing Typical Application Areas
This precision bearing set is ideally suited for high-performance machinery where maximum rigidity, speed, and accuracy are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotic Drives: Articulated arms and high-accuracy positioning systems.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and navigation equipment.
- High-Frequency Motors and Spindles: Used in PCB drilling and semiconductor manufacturing equipment.
