709 CD/P4ADBB
Miniature Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
709 CD/P4ADBB
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
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Light / Class B
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 CD/P4ADBB Bearing Product Overview & Core Advantages
The 709 CD/P4ADBB is a precision duplex angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This metric bearing features a Back-to-Back (DB) matched arrangement and a Light preload (Class B), making it ideal for managing combined loads (radial and axial) while ensuring high system stability and minimal deflection. Its P4A tolerance class guarantees superior running accuracy, positioning it as a top choice for high-performance, high-reliability machinery.
709 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 709 | Basic bearing series, defining the cross-section and general size profile. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| D | Indicates the bearing is part of a duplex pair (two bearings supplied as a set). |
| P4A | Denotes a very high precision tolerance class, exceeding ABEC 7 standards for enhanced running accuracy. |
| DB | Specifies the Back-to-Back (DB) matched arrangement, providing high moment rigidity. |
| B | Indicates the Light preload level, which minimizes runout and improves system stiffness. |
709 CD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex Back-to-Back (DB) arrangement creates a wide, stable support system that effectively resists moment loads and shaft deflection, ensuring precise shaft positioning.
- Optimized Load Capacity: The 15° contact angle is engineered to handle significant combined radial and axial loads simultaneously, a hallmark of high-performance angular contact ball bearings.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel components and optimized internal geometry contribute to a high limiting speed of 95,000 rpm.
- Precision & Accuracy: Manufactured to P4A tolerance class with tight dimensional controls on bore, outside diameter, and width, this bearing ensures low vibration and exceptional running accuracy.
- Ready-to-Install: The bearing set is pre-lubricated and comes as a pre-matched duplex pair, simplifying installation and ensuring immediate, reliable performance.
709 CD/P4ADBB Bearing Typical Application Areas
This precision duplex bearing is engineered for demanding applications where high speed, rigidity, and accuracy are paramount. Key industries and equipment include:
- High-Frequency Spindles for CNC machining centers and PCB drilling machines
- Precision Grinding Spindles
- High-speed rotors in Dental Handpieces and small tool drives
- Instrumentation and optical scanning systems
- Axial compressor sections and other high-speed turbo machinery
