7208 ACDGA/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7208 ACDGA/P4A
Basic Information
System of measurement
Metric
Weight
0.37 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
80 mm
Outside diameter tolerance
-0.004mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
14
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
7178 lbf
Radial static load rating
5130 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
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:
$ 83.46
/ each
In Stock
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7208 ACDGA/P4A Bearing Product Overview & Core Advantages
The 7208 ACDGA/P4A is a single-row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing delivers superior running accuracy and is universally matchable (SU), allowing for precise preload control when mounted in sets. Its 25° contact angle is optimized to support significant combined loads (radial and axial), making it an ideal solution for high-speed spindles and precision machinery where reliability and performance are critical.
7208 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7208 | Basic bearing series and size designation (40mm bore, 80mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Optimized internal geometry for high-speed operation. |
| GA | Universal Matchable (SU) bearing, supplied with specific internal clearance for preload setting in pairs or triples. |
| P4A | High-Precision Tolerance Class, offering extremely tight dimensional and running accuracy tolerances superior to ABEC-7. |
7208 ACDGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust chrome steel construction enable the bearing to handle significant combined radial and axial loads simultaneously, providing stable and rigid support for demanding applications.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the optimized internal design contributes to a high limiting speed of 41,000 rpm, making it suitable for very high-speed spindles.
- Precision Engineering: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for achieving high surface finishes and machining accuracy.
- Universal Matching Capability (SU): As a universally matchable bearing, the 7208 ACDGA/P4A can be mounted in preloaded sets (back-to-back, face-to-face, or tandem) without selective assembly, simplifying installation and ensuring consistent, high-performance operation.
7208 ACDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Internal and external grinding machines.
- High-Frequency Motors: Spindles for PCB drilling and routing.
- Industrial Pumps & Compressors: Applications requiring high-speed and precision.
- Robotics: High-accuracy joints and rotary actuators.
