7009 CD/HCP4ADT
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7009 CD/HCP4ADT Bearing Product Overview & Core Advantages
The 7009 CD/HCP4ADT is a precision angular contact ball bearing designed for demanding applications requiring exceptional performance. This duplex tandem (DT) arrangement consists of two matched bearings preloaded for maximum system rigidity and accuracy. Its key advantages include the ability to handle high combined loads (radial and axial), superior high-speed capability enabled by a phenolic cage and ceramic balls, and outstanding dimensional stability due to its P4A super-precision tolerance class. This configuration is ideal for high-reliability, high-precision machinery.
7009 CD/HCP4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7009 | Basic bearing series and size designation (45mm bore, 75mm OD). |
| C | Specifies a 15° contact angle, optimized for high-speed operation. |
| D | Indicates the bearing is part of a duplex tandem (DT) matched set. |
| HC | Refers to the Hybrid Ceramic construction (steel rings with ceramic balls). |
| P4A | Denotes a super-precision tolerance class for exceptional running accuracy. |
| ADT | Confirms the specific matched arrangement is Duplex Tandem. |
7009 CD/HCP4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Axial Load Capacity: The duplex tandem arrangement with preload creates an exceptionally stiff bearing system, capable of supporting high unidirectional axial loads and combined loads.
- Superior High-Speed Performance: The combination of lightweight phenolic cage and ceramic balls (lower density, reduced centrifugal force) enables a high limiting speed of 46,000 rpm, minimizing heat generation and power loss.
- Extended Service Life & Reliability: Ceramic balls are harder, more wear-resistant, and electrically insulating compared to steel, leading to longer life, especially in contaminated or electrically charged environments.
- Precision Operation: The P4A tolerance class ensures minimal runout and vibration, which is critical for applications demanding high rotational accuracy and smooth operation.
7009 CD/HCP4ADT Bearing Typical Application Areas
This high-performance precision bearing is engineered for the most demanding sectors, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy robotic arms and joints.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
- High-Frequency Motors & Spindles: PCB drilling spindles and dental handpieces.
