709 CDGA/P4A
Miniature Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
709 CDGA/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
15 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
10
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
806 lbf
Radial static load rating
360 lbf
Limiting speed
95 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
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In Stock
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709 CDGA/P4A Bearing Product Overview & Core Advantages
The 709 CDGA/P4A is a single-row angular contact ball bearing engineered for ultra-high precision applications. Positioned in the P4A tolerance class, it delivers exceptional dimensional accuracy and rotational consistency. Its primary advantage lies in its ability to support combined loads—handling significant radial loads alongside substantial axial loads in one direction—making it ideal for applications demanding high rigidity and precise shaft positioning. The extra light preload (Class A) minimizes deflection and ensures smooth, quiet operation at high speeds, establishing it as a premier choice for high-speed spindles and precision machinery.
709 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Implication |
|---|---|---|
| CDGA | Universal Matchable (SU) bearing with a 15° contact angle and Extra Light Preload (Class A). | Enables precise axial positioning and high system rigidity when mounted in pairs. The preload eliminates internal clearance for superior running accuracy. |
| P4A | Specifies a super-precision tolerance class. | Guarantees extremely tight dimensional and running accuracy, critical for applications with minimal vibration and error requirements. |
709 CDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The 15° contact angle and extra light preload work in tandem to provide maximum shaft support, significantly reducing system deflection under load and ensuring exceptional running accuracy.
- Superior Load Capacity: Engineered to handle combined radial and axial loads efficiently. With a dynamic load rating of 806 lbf and a static load rating of 360 lbf, it offers reliable performance in demanding conditions.
- Optimized High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to a high limiting speed of 95,000 rpm. This makes it an excellent high-speed bearing.
- Precision Materials: Constructed from chrome steel for both rings and balls, ensuring high durability, wear resistance, and a long operational lifespan under high-stress conditions.
709 CDGA/P4A Bearing Typical Application Areas
This bearing is specifically designed for high-performance machinery where precision and speed are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Frequency Motors: Spindles for PCB drilling and small precision motors.
- Robotics: Joints and actuators requiring high accuracy and responsiveness.
