709 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
709 CD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.013 kg
Tolerance class
P4 (ABEC-7)
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
-0.005mm 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° to 110 °C
Radial dynamic load rating
806 lbf
Radial static load rating
360 lbf
Limiting speed
150 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 104.28
/ each
In Stock
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709 CD/HCP4A Bearing Product Overview & Core Advantages
The 709 CD/HCP4A is a single-row angular contact ball bearing engineered for high-precision and high-speed applications. Its defining feature is the ability to support combined loads—simultaneously handling significant radial loads and axial loads in one direction. Manufactured to P4 (ABEC-7) tolerance class, this bearing delivers exceptional running accuracy and rotational stability. The combination of a ceramic ball material and a phenolic cage contributes to reduced weight, lower friction, and superior performance at high rotational speeds, making it an ideal choice for demanding, precision machinery.
709 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 709 CD/HCP4A provides specific technical information:
- 709: Basic bearing series number, indicating the size and dimension series.
- CD: Signifies a Duplex (matched) arrangement with a specific preload. While the specification indicates a "Single" arrangement, "CD" typically denotes a universal match for face-to-face (DF) or back-to-back (DB) pairing to achieve optimal rigidity and alignment.
- H: Indicates the use of Ceramic (Hybrid) balls.
- C: Specifies a 15° contact angle.
- P4: Denotes the P4 (ABEC-7) tolerance class for ultra-precision.
- A: Indicates an optimized internal design for enhanced performance and reduced noise.
709 CD/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The lightweight phenolic resin cage and low-density ceramic (Si3N4) balls minimize centrifugal forces, enabling stable operation at the high limiting speed of 150,000 rpm.
- Precision & Rigidity: Built to P4 tolerance class with a 15° contact angle, this bearing provides high running accuracy and sufficient axial rigidity for precise spindle applications.
- Reduced Friction & Heat Generation: Ceramic balls have a lower coefficient of thermal expansion and superior smoothness compared to steel, resulting in less friction, lower operating temperatures, and extended lubricant life.
- Preload Availability: The bearing is supplied with a preload, ensuring zero internal clearance for maximum shaft positioning accuracy and system stiffness.
709 CD/HCP4A Bearing Typical Application Areas
This high-precision angular contact bearing is ideally suited for applications requiring high rotational speeds and accuracy, such as:
- High-Frequency Spindles for PCB drilling and precision machining
- Turbochargers and auxiliary high-speed rotors
- Precision Instruments and laboratory equipment
- Dental Handpieces
- High-Performance Automation & Robotics
