7005 ACD/P4ADBC
7000 Series Super Precision Angular Contact Ball Bearings
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7005 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 7005 ACD/P4ADBC is a precision duplex angular contact ball bearing designed for applications requiring exceptional rigidity and accuracy. This matched back-to-back arrangement (DB) provides superior stability under combined loads, effectively handling radial forces and axial loads in both directions. Manufactured to P4A tolerance class, it ensures high running accuracy and is preloaded (Moderate / Class C) for optimal performance in demanding, high-speed environments up to 85,000 rpm.
7005 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7005 | Basic bearing series with 25 mm bore diameter, 47 mm outside diameter. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (two bearings in a set) configuration. |
| P4A | High precision tolerance class, specifying very tight dimensional and running accuracy. |
| DB | Back-to-Back mounting arrangement of the duplex pair. |
| C | Moderate preload level (Class C). |
7005 ACD/P4ADBC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) design creates a wide, rigid support system that significantly increases moment stiffness. This configuration enables the bearing to handle significant combined radial and axial loads from both directions simultaneously.
High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, contributing to the high limiting speed of 85,000 rpm. The 25° contact angle is optimized for high-speed operation with axial loads.
Precision & Accuracy: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on the bore, outside diameter, and width, this bearing ensures minimal runout and vibration for ultra-precise applications.
Preload & Stability: The factory-set moderate preload (Class C) eliminates internal clearance, providing immediate axial and radial stiffness, reducing deflection under load, and enhancing rotational accuracy.
7005 ACD/P4ADBC Bearing Typical Application Areas
- Machine Tool Spindles: For high-precision milling, grinding, and turning centers requiring extreme rigidity and running accuracy.
- High-Speed Machining Centers: Where high-speed performance and thermal stability are critical.
- Precision Gearboxes: Supporting shafts subject to combined loads in robotics and automation.
- Medical Equipment Spindles: In dental drills and high-speed surgical handpieces.
- Test & Measurement Equipment: For rotary stages and instruments demanding the highest levels of precision.
