S7209 ACDGB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7209 ACDGB/P4A
Basic Information
System of measurement
Metric
Weight
0.42 kg
Tolerance class
P4A
Seal type
Sealed
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
46 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
2
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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S7209 ACDGB/P4A Bearing Product Overview & Core Advantages
The S7209 ACDGB/P4A is a precision double row angular contact ball bearing engineered for applications demanding high rigidity and exceptional running accuracy. Its design enables it to simultaneously support substantial combined loads (radial and bidirectional axial loads), making it an ideal solution for compact, high-performance systems. Manufactured to the stringent P4A tolerance class, this bearing delivers superior rotational precision and reliability, while its phenolic cage and sealed construction contribute to outstanding high-speed performance and long-term, maintenance-free operation.
S7209 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle. |
| D | Double row configuration for high rigidity and load capacity. |
| GB | Universal Matchable (SU designation), indicating the bearing is supplied as one of a pair of two bearings (matched set) for optimized preload and performance. |
| P4A | High precision tolerance class exceeding ABEC 7, ensuring minimal runout and vibration for ultra-precise applications. |
S7209 ACDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides significantly increased rigidity compared to single row bearings, enabling stable support against complex combined loads and moment loads. The 25° contact angle is optimized for handling substantial bidirectional axial forces.
- Superior High-Speed Performance: The lightweight, robust phenolic cage ensures stable operation at high rotational speeds, contributing to the high limiting speed of 46,000 rpm. This makes it an excellent high-speed bearing choice.
- Precision & Accuracy: Manufactured to P4A tolerances with tight dimensional control on the bore diameter, outside diameter, and width. This guarantees exceptional running accuracy and minimal vibration.
- Optimized for Matched Sets: As a Universal Matchable bearing, it is designed to be used in a pre-loaded pair (SU arrangement), delivering enhanced system stiffness and precise axial positioning without the need for complex adjustments.
- Sealed & Pre-Lubricated: The sealed construction retains the factory-applied grease lubrication and protects against contamination, offering a long service life and maintenance-free operation within the specified temperature range.
S7209 ACDGB/P4A Bearing Typical Application Areas
This bearing's combination of high precision, rigidity, and speed capability makes it suitable for demanding applications, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Gearboxes
- High-Frequency Motors and Spindles
- Industrial Pumps and Compressors
- Robotic Arms and Precision Positioning Systems
