709 CD/P4ADGA
Miniature Super Precision Angular Contact Ball Bearings
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709 CD/P4ADGA Bearing Product Overview & Core Advantages
The 709 CD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. As a universally matchable (SU) bearing supplied in a pre-loaded duplex set, it is engineered to handle combined radial and axial loads simultaneously. Manufactured to the stringent P4A tolerance class, this bearing offers superior running accuracy, high rigidity, and reliable operation in high-speed scenarios up to 95,000 rpm. Its compact design and extra light preload make it an ideal choice for high-precision spindles and other critical machinery.
709 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 709 | Basic bearing series, indicating the bearing size and internal design. |
| C | Specifies a 15° contact angle, optimized for high-speed applications and axial load capacity. |
| D | Indicates the bearing is part of a universally matchable (SU) duplex set. |
| P4A | Denotes a high tolerance class for exceptional dimensional and running accuracy. |
| DG | Signifies an extra light preload (Class A) applied to the duplex set. |
| A | Identifies the specific preload level within the extra light range. |
709 CD/P4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex arrangement of two bearings creates a rigid support system capable of withstanding significant combined loads. The 15° contact angle is optimally designed to handle thrust loads from both directions efficiently.
High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, while the precision-ground chrome steel balls and raceways contribute to low friction and heat generation, enabling the high limiting speed of 95,000 rpm.
Precision & Accuracy: Manufactured to P4A tolerance class with tight bore, outer diameter, and width tolerances, this bearing ensures minimal runout and vibration, which is critical for high-precision applications.
Optimized for Matching: As a universally matchable (SU) bearing, any two bearings can be paired in various configurations (back-to-back, face-to-face, or tandem) to achieve the desired stiffness and load-carrying characteristics without selective mounting.
709 CD/P4ADGA Bearing Typical Application Areas
The 709 CD/P4ADGA 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 Grinding Spindles
- High-Frequency Motors
- Dental and Medical Handpieces
- Aerospace Control Systems
- High-Speed Robotic Drives
