7005 ACEGB/P4A
7000 Series Super Precision Angular Contact Ball Bearings
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7005 ACEGB/P4A Bearing Product Overview & Core Advantages
The 7005 ACEGB/P4A is a single row angular contact ball bearing engineered for applications demanding exceptional precision and high-speed performance. Manufactured to the stringent P4A tolerance class, it delivers superior running accuracy and rotational stability. A key feature is its Universal Matchable (SU) design, allowing two identical bearings to be universally matched in a back-to-back (DB) or face-to-face (DF) arrangement to support combined loads effectively. With a light preload (Class B) and a 25° contact angle, this bearing is optimized for high rigidity and excellent high-speed capabilities, making it an ideal choice for high-precision spindles and other critical machinery.
7005 ACEGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7005 | Basic bearing series and size designation (25mm bore, 47mm OD, 12mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| EGB | Optimized internal geometry and surface treatment for enhanced performance, including improved lubrication and speed capability. |
| P4A | Indicates a high-precision tolerance class with very tight dimensional and running accuracy tolerances, superior to ABEC-7. |
7005 ACEGB/P4A Bearing Structural Features & Performance Benefits
High-Speed Performance: The combination of a lightweight, durable phenolic resin cage, optimized internal geometry (EGB), and a 25° contact angle enables a very high limiting speed of 103,000 rpm. This makes it an excellent high-speed bearing for demanding applications.
High Rigidity and Load Capacity: The angular contact design and light preload provide high axial and radial rigidity, enabling the bearing to handle significant combined loads (simultaneous radial and axial forces).
Precision Engineering: Manufactured to P4A precision standards with tight dimensional tolerances, this bearing ensures minimal runout and vibration, which is critical for applications requiring high rotational accuracy.
Universal Matching Capability (SU): As a Universal Matchable bearing, two 7005 ACEGB/P4A bearings can be directly paired without selective matching, simplifying installation and ensuring optimal preload and performance in duplex sets.
7005 ACEGB/P4A Bearing Typical Application Areas
The 7005 ACEGB/P4A is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling spindles and other high-frequency motor spindles.
- Robotics: High-accuracy joints and arm assemblies.
- High-Speed Compressors and Pumps: Where reliable operation at high rotational speeds is required.
