709 ACDGB/P4A
Miniature Super Precision Angular Contact Ball Bearings
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709 ACDGB/P4A Bearing Product Overview & Core Advantages
The 709 ACDGB/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Operating under a light preload (Class B) and manufactured to P4A super-precision tolerance, this bearing is designed to handle significant axial loads in one direction and combined loads with high reliability. Its compact design, featuring a 9 mm bore and 7 mm width, makes it ideal for space-constrained, high-speed assemblies. The phenolic resin cage and factory-applied lubrication contribute to smooth operation at its maximum limiting speed of 220,000 rpm.
709 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 709 | Basic bearing series, defining the cross-sectional dimensions. |
| AC | Angular Contact design with a 25° contact angle. |
| DGB | Universal Matchable (SU) bearing. Two bearings can be universally matched in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement to support complex load configurations. |
| P4A | Indicates a super-precision tolerance class, exceeding ABEC 7 standards, which ensures minimal runout and vibration for ultra-precise applications. |
709 ACDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The 25° contact angle and robust chrome steel construction are optimized to support high axial loads in one direction and combined (radial and axial) loads, providing stable and rigid support for spindles and shafts.
- Superior High-Speed Performance: The lightweight phenolic resin cage ensures low inertia and excellent dimensional stability at high speeds, enabling reliable operation up to the specified limiting speed. The pre-applied lubrication further enhances high-speed capability.
- Precision Engineering: Manufactured to P4A tolerance with tight dimensional control on the bore diameter, outside diameter, and width, this bearing guarantees exceptional running accuracy and minimal vibration.
- Application Flexibility: The Universal Matchable (DGB) feature allows for the creation of pre-loaded, high-rigidity bearing sets from two single bearings, simplifying inventory and assembly for complex machine designs.
709 ACDGB/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for demanding applications where high speed, accuracy, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles
- High-Frequency Motors and Spindles
- Precision Grinding Equipment
- Robotic Drives and Actuators
- Medical and Dental Handpieces
- Aerospace Instrumentation
