7208 ACDGC/P4A
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7208 ACDGC/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
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7208 ACDGC/P4A Bearing Product Overview & Core Advantages
The 7208 ACDGC/P4A is a precision single-row angular contact ball bearing engineered for high-performance applications. Its defining characteristic is the 25° contact angle, which provides superior axial load capacity in one direction while also handling significant radial loads. Manufactured to the exacting P4A tolerance class, this bearing offers exceptional running accuracy, high rigidity, and is universally matchable (SU), allowing for flexible arrangement in sets of two or more to accommodate complex load scenarios. Pre-lubricated and featuring a phenolic cage, it is optimized for high-speed operation up to 41,000 rpm, making it an ideal choice for demanding, high-precision machinery.
7208 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Interpretation | Technical Significance |
|---|---|---|
| 7208 | Basic Designation | Indicates a metric series bearing with a 40mm bore, 80mm OD, and 18mm width. |
| AC | Angular Contact | The bearing is designed with a contact angle to support combined loads. |
| DGC | Contact Angle & Clearance | Specifies a 25° contact angle and a specific internal radial clearance for moderate preload (Class C). |
| P4A | Tolerance Class | Denotes a high-precision grade with tolerances tighter than ABEC 7, ensuring minimal runout and vibration. |
7208 ACDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The 25° contact angle and robust construction using chrome steel rings and balls enable this bearing to handle high combined radial and axial loads effectively, providing stable and rigid support for rotating shafts.
- Optimized High-Speed Performance: The lightweight and durable phenolic resin cage minimizes centrifugal forces and friction, which is critical for achieving the high limiting speed of 41,000 rpm. The cage ensures smooth operation and guides the balls efficiently.
- Precision Engineering: Conforming to the P4A tolerance class, this bearing features extremely tight dimensional and running accuracy. This results in superior rotational performance, reduced noise, and enhanced system longevity in precision applications.
- Universal Matching (SU): As a universally matchable bearing, individual 7208 ACDGC/P4A units can be mounted in any combination (back-to-back, face-to-face, or tandem) to create a matched set that meets specific application requirements for preload and stiffness.
7208 ACDGC/P4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for applications requiring high speed, accuracy, and rigidity. Key industries and machinery include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- High-Frequency Motors and Spindles: Where minimal runout and vibration are critical.
- Precision Robotic Drives: In joints and arm assemblies demanding high positional accuracy.
- Medical and Dental Equipment: Such as high-speed handpieces and scanners.
- Aerospace Actuation Systems: For control surfaces and auxiliary power units.
