7006 ACD/P4ATBTA
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7006 ACD/P4ATBTA
Basic Information
System of measurement
Metric
Weight
0.34 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
39 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
6660 lbf
Radial static load rating
5130 lbf
Limiting speed
53 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
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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Product Overview and Core Advantages
The 7006 ACD/P4ATBTA is a precision angular contact ball bearing designed for applications requiring exceptional accuracy and rigidity. This triplex back-to-back (TBT) matched set of three bearings is manufactured to P4A tolerance class, ensuring superior dimensional and running accuracy. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously with high stability, making it ideal for high-precision spindles and other demanding machinery. The extra light preload (Class A) minimizes deflection under load, contributing to smooth operation and extended service life.
7006 ACD/P4ATBTA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle |
| P4A | High precision tolerance class (equivalent to ABEC 7) |
| TBT | Triplex Back-to-Back matched arrangement |
| A | Extra light preload classification |
Structural Features and Performance Benefits
- High Rigidity and Stability: The triplex back-to-back arrangement creates a highly rigid bearing system that effectively resists moment loads and shaft deflection, crucial for maintaining precision in machining operations.
- Superior Load Capacity: With a 25° contact angle and triple bearing configuration, this set provides excellent capacity for combined radial and axial loads in both directions.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls (bore: -0.004mm to 0, OD: -0.004mm to 0), ensuring minimal runout and vibration for high-speed applications up to 53,000 rpm.
- Optimized Cage Design: The phenolic cage offers excellent strength-to-weight ratio, reduced friction, and compatibility with various lubricants, contributing to the bearing's high-speed capability.
- Premium Materials: Both rings and balls are made from chrome steel, providing high hardness, wear resistance, and durability under demanding operating conditions.
7006 ACD/P4ATBTA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers requiring exceptional rigidity and accuracy
- High-Speed Machining Centers: Applications demanding stable performance at elevated rotational speeds
- Precision Instrumentation: Measuring equipment and analytical instruments where minimal vibration is critical
- Robotic Systems: High-accuracy robotic arms and positioning systems
- Medical Equipment: Dental handpieces and surgical tools requiring reliable, high-speed operation
