7006 ACD/P4AQBCD
7000 Series Super Precision Angular Contact Ball Bearings
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7006 ACD/P4AQBCD Bearing Product Overview & Core Advantages
The 7006 ACD/P4AQBCD is a precision quadruplex matched set of angular contact ball bearings designed for the most demanding applications. This P4A tolerance class configuration, arranged in a Back-to-Back (QBC) quadruplex setup, delivers exceptional system rigidity and stability. Its core advantage lies in its ability to handle combined loads—significant radial and thrust loads simultaneously—while maintaining high precision under heavy preload (Class D). This makes it an ideal solution for high-performance spindles requiring maximum stiffness and rotational accuracy.
7006 ACD/P4AQBCD Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design, 25° contact angle |
| P4A | High precision tolerance class (exceeding ABEC 7) |
| QBC | Quadruplex Back-to-Back matched arrangement for maximum rigidity |
| D | Heavy preload classification for minimal deflection |
7006 ACD/P4AQBCD Bearing Structural Features & Performance Benefits
Optimized Rigidity & Load Capacity: The quadruplex back-to-back arrangement creates a highly stable bearing system capable of withstanding complex combined loads and moments. The heavy preload (Class D) eliminates internal clearance, ensuring exceptional system stiffness and precise shaft positioning.
High-Speed Capability: The phenolic cage material provides excellent strength-to-weight ratio, reducing centrifugal forces and enabling stable operation at the limiting speed of 53,000 rpm. The 25° contact angle offers an optimal balance between radial and axial load capacity for high-speed applications.
Precision Engineering: Manufactured to P4A tolerance class standards with tight dimensional controls (bore and OD tolerance: -0.004mm to 0), this bearing set ensures consistent high-precision performance and reliable operation in critical applications.
7006 ACD/P4AQBCD Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision milling applications
- High-Frequency Spindles: PCB drilling machines and precision engraving equipment
- Precision Rotary Systems: Industrial robots, rotary tables, and indexing heads
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Medical Equipment: High-speed dental handpieces and surgical drill systems
