7009 CD/P4ADGD
7000 Series Super Precision Angular Contact Ball Bearings
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7009 CD/P4ADGD Bearing Product Overview & Core Advantages
The 7009 CD/P4ADGD is a precision angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. Engineered with a 15° contact angle and Class P4A dimensional and running accuracy, this bearing excels at handling combined loads (simultaneous radial and axial loads). Its heavy preload (Class D) ensures maximum system stiffness, making it ideal for high-precision, high-reliability machinery where minimal deflection under load is critical. The Universal Matchable (SU) design allows for flexible mounting arrangements in pairs.
7009 CD/P4ADGD 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. |
| CD | Contact angle design of 15°. |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards, with enhanced running accuracy requirements. |
| DG | Universal Matchable (SU) designation, indicating the bearing is supplied as one of a universally matchable pair. |
| D | Specifies a heavy preload (Class D). |
7009 CD/P4ADGD Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The combination of a 15° contact angle and a heavy preload provides exceptional system stiffness, minimizing axial and radial play. This is critical for applications requiring high positional accuracy and resistance to operational deflection.
- Superior Load Capacity: As an angular contact bearing, it is optimized to support significant combined radial and axial loads simultaneously. The robust design, featuring 17 high-grade chrome steel balls, ensures a high dynamic (10,530 lbf) and static (10,125 lbf) load rating.
- Optimized for High-Speed Operation: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 46,000 rpm. This makes the bearing suitable for high-speed spindles and other demanding rotational applications.
- Precision Materials & Construction: Manufactured from chrome steel for rings and balls, the bearing offers high durability and wear resistance. The tight P4A tolerance class ensures consistent, precise performance and low running noise.
7009 CD/P4ADGD Bearing Typical Application Areas
The 7009 CD/P4ADGD 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 Gearboxes: Robotics and high-accuracy transmission systems.
- High-Frequency Motors and Spindles: Applications requiring minimal runout and high rotational accuracy.
- Medical and Laboratory Equipment: Centrifuges and other precision instruments.
- Aerospace Actuation Systems: Where reliability under combined loads is essential.
