709 ACDGA/P4A
Miniature Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
709 ACDGA/P4A
Basic Information
System of measurement
Metric
Weight
0.015 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
9 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
24 mm
Outside diameter tolerance
-0.004mm to 0
Width
7 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
10
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
776 lbf
Radial static load rating
344 lbf
Limiting speed
220 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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709 ACDGA/P4A Bearing Product Overview & Core Advantages
The 709 ACDGA/P4A is a single-row angular contact ball bearing engineered for high-precision and high-speed applications. Its defining feature is the 25° contact angle and P4A super-precision tolerance class, enabling it to handle significant combined radial and axial loads simultaneously. The open design, combined with a phenolic cage and universal matching capability (SU), makes it ideal for demanding, high-rigidity spindle arrangements where exceptional running accuracy and thermal stability are paramount.
709 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| 709 | Basic series code, indicating a metric, light series bearing with a 9mm bore. |
| AC | Angular Contact design. |
| DGA | Specific internal design and geometry optimized for high-speed performance and universal matching. |
| P4A | The tolerance class, denoting super-precision levels with even tighter tolerances than ABEC 7/ISO P4, ensuring minimal runout and vibration. |
709 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust construction provide excellent resistance to combined loads, making it suitable for applications with high axial and radial force components.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, lowers friction, and contributes to the high limiting speed of 220,000 rpm. The open design facilitates efficient lubrication and cooling.
- Precision & Accuracy: Manufactured to P4A tolerance class, this bearing guarantees extreme dimensional and running accuracy, which is critical for minimizing vibration and maintaining positional integrity in precision machinery.
- Universal Matching (SU): Bearings are manufactured to universal matching standards, allowing any two bearings to be paired in a duplex set (DB, DF, or DT arrangement) without selective matching, simplifying installation and inventory.
709 ACDGA/P4A Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Rotary Systems
- High-Frequency Spindles
- Medical & Dental Handpieces
- Aviation & Aerospace Instrumentation
