7209 ACD/P4ADT
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7209 ACD/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
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
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 ACD/P4ADT Bearing Product Overview & Core Advantages
The 7209 ACD/P4ADT is a precision angular contact ball bearing supplied as a duplex tandem (DT) matched set. This configuration is engineered to deliver exceptional performance in applications requiring high rigidity and the capacity to handle significant combined loads. The bearings are manufactured to a P4A tolerance class, ensuring superior running accuracy and rotational precision. Pre-loaded at the factory, this set is ready for immediate installation, offering optimized stiffness and axial load capacity in a compact design, making it ideal for high-speed, high-precision machinery.
7209 ACD/P4ADT 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 with a 25° contact angle. |
| D | Indicates the bearing is part of a Duplex (matched pair) set. |
| P4A | Denotes a high precision tolerance class for exceptional running accuracy. |
| DT | Specifies the Duplex Tandem arrangement of the matched set. |
7209 ACD/P4ADT Bearing Structural Features & Performance Benefits
- High Rigidity & Axial Load Capacity: The duplex tandem (DT) arrangement stacks two bearings to significantly increase axial stiffness and load capacity in one direction, making it suitable for applications with heavy thrust loads.
- Precision Performance: Manufactured to P4A tolerance standards, these bearings provide extremely low runout and smooth operation, which is critical for maintaining accuracy in high-speed spindles.
- Optimized High-Speed Operation: The lightweight phenolic resin cage ensures excellent dimensional stability and low friction, contributing to a high limiting speed of 41,000 rpm. The 25° contact angle offers a balanced capability for both radial and axial loads at high velocities.
- Durability and Reliability: Constructed from chrome steel for both rings and balls, the bearing provides high fatigue resistance and long service life under demanding operating conditions.
7209 ACD/P4ADT Bearing Typical Application Areas
This precision bearing set is ideally suited for high-performance applications where rigidity, speed, and accuracy are paramount. Key industries and machinery include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing equipment.
- High-Frequency Motors: Spindles for electric motors requiring minimal vibration.
- Industrial Pumps and Compressors: For shafts subjected to significant axial thrust.
