7009 ACE/P4ADBB
7000 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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7009 ACE/P4ADBB Bearing Product Overview & Core Advantages
The 7009 ACE/P4ADBB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement of two matched bearings provides superior stiffness and the ability to handle significant combined loads (radial and axial loads simultaneously). Manufactured to the stringent P4A tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed, high-precision machinery where reliability is paramount.
7009 ACE/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7009 | Basic bearing series, indicating a 45 mm bore, 75 mm OD, and 32 mm width. |
| ACE | Indicates a 25° contact angle and a light preload (Class B) for optimal performance under combined loads. |
| P4A | Denotes a high-precision tolerance class with enhanced dimensional and running accuracy. |
| DBB | Specifies the Duplex Back-to-Back mounting arrangement, which increases rigidity and moment load capacity. |
7009 ACE/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back configuration creates a rigid bearing system that effectively resists moment loads and supports high combined radial and axial loads. The 25° contact angle is optimized for axial load carrying capacity.
Precision & High-Speed Performance: Manufactured to P4A precision class standards, this bearing ensures minimal runout for smooth, quiet operation. The phenolic resin cage offers excellent strength-to-weight ratio and is ideal for high-speed applications, contributing to the impressive limiting speed of 46,000 rpm.
Material & Construction: Constructed from high-grade chrome steel for both rings and balls, the bearing provides high durability and fatigue resistance. The open seal type allows for custom lubrication schemes tailored to specific operational needs.
7009 ACE/P4ADBB Bearing Typical Application Areas
The 7009 ACE/P4ADBB is engineered for high-performance machinery where precision and speed are critical. Its primary applications include:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Gearboxes
- High-Frequency Motors and Spindles
- Industrial Pumps and Compressors
- Aerospace and Defense Actuation Systems
