7209 ACDGB/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7209 ACDGB/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
25 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
14
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
9225 lbf
Radial static load rating
6750 lbf
Limiting speed
41 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7209 ACDGB/P4A Bearing Product Overview & Core Advantages
The 7209 ACDGB/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Engineered to simultaneously handle combined radial and axial loads in one direction, this bearing features a 25° contact angle and light preload (Class B) for optimal performance. Its P4A tolerance class ensures ultra-precise dimensions and running accuracy, making it ideal for high-speed spindles and other critical machinery where high rigidity and minimal runout are paramount.
7209 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7209 | Basic bearing series, indicating a 45 mm bore, 85 mm OD, and 19 mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| DGB | Back-to-back matched bearing set arrangement (Universal Matchable SU). |
| P4A | High-precision tolerance class exceeding ABEC 7 standards, ensuring extremely tight dimensional and running accuracy. |
7209 ACDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and 25° contact angle provide superior stiffness, enabling the bearing to effectively support combined loads (radial and single-direction axial loads) with high stability.
- Optimized High-Speed Performance: The phenolic resin cage offers low weight and excellent high-speed stability, contributing to the high limiting speed of 41,000 rpm. The open design facilitates efficient lubrication management.
- Precision Engineering: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration, which is critical for maintaining precision in high-speed applications.
- Universal Matching Capability (SU): Bearings are universally matchable and supplied in sets of three, allowing for flexible mounting in back-to-back (DB) or face-to-face (DF) arrangements to optimize preload and system rigidity.
7209 ACDGB/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, engraving machines, and other high-precision automated equipment.
- High-Frequency Motors and Robotic Drives requiring high accuracy and speed.
- Medical Equipment such as dental handpieces and laboratory centrifuges.
