7209 ACD/HCP4ADGB
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7209 ACD/HCP4ADGB
Basic Information
System of measurement
Metric
Weight
0.68 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
38 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
14918 lbf
Radial static load rating
13500 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 358.13
/ each
In Stock
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7209 ACD/HCP4ADGB Bearing Product Overview & Core Advantages
The 7209 ACD/HCP4ADGB is a super-precision double row angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and rigidity. This P4A tolerance class bearing features a light preload (Class B) and is manufactured as a Universal Matchable (SU) set, allowing for flexible mounting arrangements in pairs. Its core advantages include the ability to handle combined loads (radial and bidirectional axial loads) simultaneously, superior high-speed performance enabled by a phenolic cage and ceramic balls, and outstanding operational stability due to its matched set configuration and precise manufacturing.
7209 ACD/HCP4ADGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7209 | Basic bearing series and size designation (45mm bore, 85mm OD). |
| ACD | Contact Angle of 25° and Double Row design. |
| HC | Hybrid Ceramic construction (Ceramic balls with steel rings). |
| P4A | High-Precision Tolerance Class, tighter than ABEC 7/ISO P4. |
| DGB | Universal Matchable (SU) bearing set, pre-lubricated. |
7209 ACD/HCP4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design provides high radial and axial rigidity, enabling it to withstand significant combined loads. The 25° contact angle is optimized for sustaining substantial axial loads in both directions.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls reduces centrifugal forces and friction, allowing for a high limiting speed of 41,000 rpm. This makes it an ideal high-speed bearing.
- Enhanced Durability and Precision: The hybrid ceramic construction offers improved wear resistance, lower heat generation, and extended service life. The P4A tolerance ensures minimal runout and vibration for ultra-precise applications.
- Universal Matchability: Designated as Universal Matchable (SU), these bearings can be mounted in various preload configurations (back-to-back, face-to-face, or tandem) without selective assembly, simplifying installation and inventory.
7209 ACD/HCP4ADGB Bearing Typical Application Areas
This high-performance bearing is specifically designed for demanding applications, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring extreme precision and rigidity.
- High-Frequency Motors and Spindles: Where low friction and high rotational accuracy are critical.
- Precision Instrumentation: Including measuring devices and laboratory equipment.
- Aerospace and Defense Systems: For gyroscopes, navigation systems, and other critical rotating assemblies.
