7209 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7209 ACDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.34 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
85 mm
Outside diameter tolerance
-0.004mm to 0
Width
19 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
14
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
9225 lbf
Radial static load rating
6750 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
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
Price:
$ 208.29
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
7209 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The 7209 ACDGA/HCP4A is a single-row angular contact ball bearing engineered for ultra-high precision and performance. Positioned in the premium P4A tolerance class, it delivers exceptional running accuracy and rotational stability. A key advantage is its universal matchable (SU) design, allowing bearings to be mounted in tandem, face-to-face, or back-to-back arrangements to optimize stiffness and load distribution in the application. The use of ceramic balls and a phenolic cage contributes to superior high-speed capability, reduced weight, and extended service life, making it ideal for demanding, high-reliability applications.
7209 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7209 | Basic bearing series and size designation (45mm bore, 85mm OD). |
| AC | Angular Contact design. |
| DGA | Specific internal design and contact angle (25°). |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls. |
| P4A | Ultra-precision tolerance class, tighter than ABEC 7, ensuring minimal runout and vibration. |
7209 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed Performance & Rigidity: The combination of a lightweight phenolic cage and low-density ceramic balls significantly reduces centrifugal forces, enabling a high limiting speed of 41,000 rpm. The 25° contact angle provides excellent rigidity for withstanding combined loads (radial and axial).
- Precision & Accuracy: Manufactured to a P4A tolerance class with tight dimensional controls on the bore, outside diameter, and width, this bearing guarantees supreme rotational accuracy and predictable performance.
- Universal Matching Capability (SU): This feature allows multiple bearings to be precisely matched and preloaded in sets, creating a system with enhanced stiffness and the ability to handle complex loading conditions.
- Hybrid Ceramic Advantage: Ceramic balls offer superior electrical resistance, reduced thermal expansion, and higher hardness compared to steel, leading to longer life, especially in high-speed or electrically challenging environments.
7209 ACDGA/HCP4A Bearing Typical Application Areas
This high-precision, high-speed bearing is ideally suited for critical applications, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring utmost accuracy and rigidity.
- High-Frequency Motors and Spindles: Used in PCB drilling, dental handpieces, and other applications demanding extreme rotational speeds.
- Precision Instrumentation: Aerospace gyroscopes, optical scanners, and medical imaging equipment.
- Robotics: In high-precision robot arm joints and actuators where compact size and high stiffness are critical.
