7006 ACD/P4ADBB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7006 ACD/P4ADBB
Basic Information
System of measurement
Metric
Weight
0.22 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
26 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
14
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4972 lbf
Radial static load rating
3442 lbf
Limiting speed
53 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
No drawings available at the moment, will be launched soon
In Stock
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7006 ACD/P4ADBB Bearing Product Overview & Core Advantages
The 7006 ACD/P4ADBB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex bearing set features a Back-to-Back (DB) matched arrangement, providing superior stability and the ability to withstand combined loads, including significant radial loads and bidirectional axial loads. Manufactured to the stringent P4A tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed, high-precision machinery. The pre-lubricated design and light preload (Class B) contribute to ready-to-install convenience and optimal performance from startup.
7006 ACD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7006 | Basic bearing designation: 30 mm bore, 55 mm OD, 26 mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (Two bearings supplied as a matched set). |
| P4A | High precision tolerance class, exceeding ABEC-7/ISO P4 standards. |
| DBB | Matched arrangement: Back-to-Back (DB). This configuration provides high moment rigidity. |
7006 ACD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The Back-to-Back (DB) duplex arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring precise shaft positioning.
- Superior Load Capacity: The 25° contact angle and duplex design enable the bearing to handle significant combined radial and axial loads from both directions simultaneously.
- High-Speed Capability: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and allows for a high limiting speed of 53,000 rpm. The open design facilitates efficient lubrication management.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, resulting in smooth, quiet, and vibration-free operation.
- Durable Construction: Made from high-grade chrome steel for both rings and balls, ensuring long service life and reliability under demanding operating conditions.
7006 ACD/P4ADBB Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, speed, and rigidity are critical. Key industries and equipment include:
- Machine Tool Spindles (e.g., milling, grinding, and turning centers)
- High-Frequency Motors and Spindles
- Precision Gearboxes and Drives
- Robotics and Automation Arms
- Medical Equipment (e.g., high-speed dental handpieces, centrifuges)
- Aerospace Actuation Systems
