7209 CDGA/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7209 CDGA/P4A
Basic Information
System of measurement
Metric
Weight
0.41 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
15 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
14
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
9518 lbf
Radial static load rating
6975 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
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:
$ 98.04
/ each
In Stock
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7209 CDGA/P4A Bearing Product Overview & Core Advantages
The 7209 CDGA/P4A is a single-row angular contact ball bearing engineered for ultra-high precision applications. Positioned in the P4A tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its defining characteristic is the 15° contact angle and Universal Matchable (SU) designation, allowing it to be precisely preloaded in sets to achieve optimal system rigidity. This bearing is pre-lubricated and designed to handle combined radial and axial loads simultaneously, making it ideal for high-speed spindles and other demanding machinery requiring superior performance.
7209 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7209 | Basic bearing series, indicating a light series angular contact bearing with a 45 mm bore. |
| C | Specifies a 15° contact angle, optimized for high-speed operation. |
| DG | Universal Matchable bearing. Two bearings can be mounted in a DF (face-to-face) or DB (back-to-back) arrangement to support combined loads. |
| A | Indicates an Extra Light preload (Class A), which minimizes friction and heat generation for superior high-speed performance. |
| /P4A | Denotes an ultra-precision tolerance class with enhanced running accuracy and dimensional stability beyond ABEC 7/ISO P4 standards. |
7209 CDGA/P4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The combination of a phenolic resin cage, a 15° contact angle, and an extra light preload enables a high limiting speed of 41,000 rpm. The phenolic cage offers excellent strength-to-weight ratio and operates smoothly with minimal friction.
- Ultra-Precision Performance: Manufactured to P4A tolerance class with tight bore, outside diameter, and width tolerances, this bearing ensures minimal runout and vibration, which is critical for applications demanding extreme accuracy.
- Superior Rigidity & Load Capacity: The Universal Matchable (SU) design allows bearings to be supplied in matched sets of 4. When mounted in pairs (DF or DB), they create a highly rigid bearing system capable of supporting significant combined radial and axial loads (Dynamic: 9518 lbf, Static: 6975 lbf).
- Optimized Material & Lubrication: Constructed from chrome steel for both rings and balls, ensuring high durability and fatigue resistance. The bearing is pre-lubricated for immediate operation and reliable performance within a temperature range of -30°C to 110°C.
7209 CDGA/P4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for high-performance machinery where speed, accuracy, and rigidity are paramount.
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving machines, and high-frequency motors.
- Robotics: High-accuracy joints and arm actuators.
- Medical Equipment: Dental handpieces and laboratory centrifuges.
- Aerospace & Defense Systems: Gyroscopes, radar equipment, and navigation instruments.
