7005 ACD/P4AQBTD
7000 Series Super Precision Angular Contact Ball Bearings
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7005 ACD/P4AQBTD Bearing Product Overview & Core Advantages
The 7005 ACD/P4AQBTD is a precision angular contact ball bearing configured in a Quadruplex Tandem Back-to-Back (QBT) matched set. Engineered for the most demanding applications, this bearing arrangement delivers exceptional high rigidity and is optimized to handle significant combined loads. Its P4A tolerance class ensures superior running accuracy, making it an ideal choice for high-performance machinery requiring maximum stiffness and precision under heavy preload conditions.
7005 ACD/P4AQBTD Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle. |
| P4A | Indicates a high-precision tolerance class exceeding ABEC 7/ISO P4 standards. |
| QBT | Denotes the bearing is part of a Quadruplex Tandem Back-to-Back matched set of 4 bearings. |
| D | Signifies a Heavy preload (Class D) for ultimate stiffness. |
7005 ACD/P4AQBTD Bearing Structural Features & Performance Benefits
The performance of the 7005 ACD/P4AQBTD is derived from its specific construction and matching:
- Extreme Rigidity & Load Capacity: The Quadruplex Tandem Back-to-Back (QBT) arrangement provides an exceptionally rigid support system, capable of withstanding heavy combined loads (radial and axial) from multiple directions. The heavy preload (Class D) eliminates internal clearance, maximizing system stiffness and rotational accuracy.
- Precision & High-Speed Capability: Manufactured to a P4A tolerance class, this bearing guarantees minimal runout and smooth operation. The lightweight phenolic cage is ideal for high-speed applications, reducing centrifugal forces and allowing a limiting speed of 85,000 rpm. The 25° contact angle is optimized for sustaining high axial loads.
- Durability & Reliability: Made from chrome steel for both rings and balls, the bearing offers high fatigue life and wear resistance. The set is supplied pre-lubricated, ensuring immediate startup and reliable operation within a temperature range of -30°C to 110°C.
7005 ACD/P4AQBTD Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is specifically designed for advanced industrial equipment, including:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Advanced Robotic Drives
- Aerospace Actuation Systems
