7209 CD/P4ADT
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7209 CD/P4ADT
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
Duplex Tandem (DT)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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7209 CD/P4ADT Bearing Product Overview & Core Advantages
The 7209 CD/P4ADT is a precision angular contact ball bearing supplied as a duplex tandem (DT) matched set. Engineered for exceptional performance in demanding applications, this bearing configuration is designed to handle primarily axial loads in one direction with high rigidity. Manufactured to P4A tolerance class, it guarantees superior running accuracy and rotational precision. Its preloaded, matched arrangement ensures immediate operational readiness and eliminates internal clearance, making it ideal for high-speed spindles and other precision machinery where maximum stiffness and positional accuracy are critical.
7209 CD/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7209 | Basic bearing series, indicating a 45 mm bore, 85 mm OD, and 38 mm width. |
| C | Designates a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| D | Indicates the bearing is part of a duplex pair. |
| P4A | Specifies a high precision tolerance class with enhanced dimensional and running accuracy requirements. |
| DT | Denotes the Duplex Tandem arrangement. Two bearings are mounted together to increase axial load capacity in a single direction. |
7209 CD/P4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Axial Load Capacity: The duplex tandem arrangement combines two bearings to create an exceptionally rigid assembly capable of supporting high unidirectional axial loads, making it suitable for preloaded systems.
- Precision & High-Speed Performance: Manufactured to P4A tolerance class and featuring a phenolic resin cage, this bearing ensures smooth operation, low vibration, and excellent performance at its high limiting speed of 41,000 rpm.
- Optimized Material & Design: Constructed from chrome steel for both rings and balls, the bearing offers high durability and fatigue resistance. The 15° contact angle is a perfect balance for high-speed and axial load requirements.
- Preloaded & Ready-to-Install: Supplied as a preloaded matched set, the 7209 CD/P4ADT simplifies installation and ensures optimal performance from the moment of commissioning by eliminating internal play.
7209 CD/P4ADT Bearing Typical Application Areas
This precision bearing set is ideally suited for applications requiring high speed, high rigidity, and precise axial positioning. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines and other high-precision automated equipment.
- High-Frequency Motors: Spindles for routers and other motorized tools.
- Axial Turbomachinery: Compressors and pumps where high unidirectional axial loads are present.
