7209 CD/P4ADGC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7209 CD/P4ADGC
Basic Information
System of measurement
Metric
Weight
0.82 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
15 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
14
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
15795 lbf
Radial static load rating
13950 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
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 156.37
/ each
In Stock
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7209 CD/P4ADGC Bearing Product Overview & Core Advantages
The 7209 CD/P4ADGC is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-set pair, it is engineered to accommodate combined loads (radial and axial) simultaneously. Its P4A tolerance class ensures ultra-precision operation, making it ideal for high-speed spindles and other critical machinery where high rigidity and minimal runout are paramount.
7209 CD/P4ADGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7209 | Basic bearing series, indicating a 45mm bore, 85mm OD, and 38mm width. |
| CD | A universal matchable pair arrangement with a specific contact angle combination for optimal load distribution. |
| P4A | A super-precision tolerance class exceeding ABEC 7 (ISO Class 4), with enhanced running accuracy for spindle applications. |
| DGC | Indicates a moderate preload (Class C) applied to the bearing pair, increasing system stiffness and reducing deflection under load. |
7209 CD/P4ADGC Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The universal matchable pair (SU) design creates a rigid bearing system that can handle significant combined radial and axial loads from both directions. The 15° contact angle and moderate preload further enhance this rigidity, minimizing axial and radial play.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the optimized internal geometry contributes to a high limiting speed of 41,000 rpm, making it suitable for high-speed applications.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, this bearing ensures smooth, precise, and vibration-free operation.
- Durable Construction: Components made from chrome steel for rings and balls provide high fatigue resistance and long service life under demanding conditions.
7209 CD/P4ADGC Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance machinery, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications requiring extreme accuracy and surface finish.
- High-Frequency Motors: Spindles for PCB drilling and other high-RPM electric motors.
- Medical Equipment: High-speed drills and dental handpieces.
- Robotics: Precision joints and arm assemblies requiring high rigidity.
