7009 CD/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7009 CD/HCP4ADBA
Basic Information
System of measurement
Metric
Weight
0.4 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
75 mm
Outside diameter tolerance
-0.004mm to 0
Width
32 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
17
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
10530 lbf
Radial static load rating
10125 lbf
Limiting speed
46 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
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7009 CD/HCP4ADBA Bearing Product Overview & Core Advantages
The 7009 CD/HCP4ADBA is a duplex back-to-back angular contact ball bearing designed for applications requiring exceptional precision and high rigidity. This matched pair configuration is engineered to handle combined radial and axial loads simultaneously, providing superior stability and rotational accuracy. Featuring a P4A super-precision tolerance and an extra light preload (Class A), it is ideally suited for high-speed spindles and other demanding machinery where minimal runout and thermal stability are critical. The use of ceramic balls further enhances its performance in high-speed and thermally challenging environments.
7009 CD/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7009 | Basic bearing series, indicating a 45 mm bore, 75 mm OD, and 32 mm width. |
| C | 15° contact angle, optimized for high-speed operation and axial load capacity. |
| D | Indicates a duplex pair of bearings. |
| DB | Back-to-Back arrangement. This configuration provides high moment rigidity and excellent operational stability. |
| HC | Refers to the Hybrid Ceramic construction, featuring steel rings and ceramic balls. |
| P4A | Denotes a super-precision tolerance class, exceeding ABEC 7 standards for runout and dimensional accuracy. |
| A | Specifies an Extra Light Preload (Class A), minimizing friction and heat generation at high speeds. |
7009 CD/HCP4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring precise shaft positioning.
- Superior Load Capacity: The angular contact design with a 15° contact angle enables the bearing to support significant combined radial and axial loads from both directions.
- Enhanced High-Speed Performance: The combination of hybrid ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage allows for a high limiting speed of 46,000 rpm. This setup reduces friction, heat buildup, and allows for higher operational DN values.
- Precision & Accuracy: Manufactured to P4A tolerance standards, this bearing guarantees minimal running noise and vibration, which is critical for applications requiring high rotational accuracy.
- Thermal Management: Ceramic balls have a lower coefficient of thermal expansion than steel, contributing to more consistent preload and performance across the operating temperature range of -30°C to 110°C.
7009 CD/HCP4ADBA Bearing Typical Application Areas
This precision angular contact bearing is engineered for high-performance applications, including:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Grinding Spindles
- High-Frequency Motors and High-Speed Drives
- Aerospace & Defense Systems (Gyroscopes, navigation systems)
- Medical Equipment (Dental handpieces, centrifuges)
- Semiconductor Manufacturing Equipment
