709 CD/P4ADGB
Miniature Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
709 CD/P4ADGB
Basic Information
System of measurement
Metric
Weight
0.03 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
14 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
1287 lbf
Radial static load rating
720 lbf
Limiting speed
95 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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709 CD/P4ADGB Bearing Product Overview & Core Advantages
The 709 CD/P4ADGB is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As a universally matchable (SU) bearing supplied in a preloaded duplex set, it delivers superior performance under combined radial and axial loads. Manufactured to a P4A tolerance class, it offers extremely tight dimensional and running accuracy, making it ideal for high-speed spindles and other precision machinery where minimal runout and high system rigidity are critical.
709 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 709 CD | Basic bearing designation with a 15° contact angle. |
| P4A | Indicates a high-precision tolerance class, exceeding ABEC 7/ISO P4 standards, ensuring extremely tight running accuracy. |
| D | Signifies a duplex set of two bearings. |
| GB | Denotes a specific preload level - Light preload (Class B). This optimizes bearing stiffness while controlling heat generation. |
709 CD/P4ADGB Bearing Structural Features & Performance Benefits
- Enhanced Rigidity and Load Capacity: The duplex arrangement and universal matchability (SU) create a highly rigid bearing system capable of supporting significant combined loads. The 15° contact angle is optimized for handling substantial axial loads in addition to radial forces.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 95,000 rpm. The open design and factory-applied lubrication facilitate efficient heat dissipation.
- Exceptional Precision: The P4A tolerance class guarantees minimal dimensional variation and extremely low running vibration, which is paramount for applications requiring high positional accuracy and smooth operation.
- Premium Material Construction: Manufactured from chrome steel for both rings and balls, this bearing ensures high durability, long service life, and consistent performance under the specified temperature range.
709 CD/P4ADGB Bearing Typical Application Areas
This precision bearing is engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision lathes.
- Precision Instrumentation: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Frequency Motors and Spindles: Where minimal runout and high rigidity are non-negotiable.
- Robotics: Critical joints and arm assemblies requiring accurate and repeatable motion.
