S7208 CD/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S7208 CD/P4A
Basic Information
System of measurement
Metric
Weight
0.38 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
40 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
80 mm
Outside diameter tolerance
-0.007mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
14
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
7605 lbf
Radial static load rating
5400 lbf
Limiting speed
18 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
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
Price:
$ 311.2
/ each
In Stock
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S7208 CD/P4A Bearing Product Overview & Core Advantages
The S7208 CD/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Engineered to a P4 (ABEC-7) tolerance class, it delivers superior running precision. Its key advantage lies in its ability to accommodate combined loads—simultaneously handling significant radial and axial loads. The phenolic cage and preload configuration contribute to its high-speed performance and operational stability, making it an ideal choice for high-reliability, high-rigidity spindle arrangements.
S7208 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7208 | Basic bearing series designation, indicating a 40mm bore, 80mm OD, 18mm width angular contact bearing. |
| CD | Indicates a specific contact angle (15°) and a preload class, optimizing the bearing for high rigidity and precise shaft positioning. |
| P4A | Denotes the tolerance class P4 (ABEC-7), ensuring extremely tight dimensional and running accuracy for precision applications. |
S7208 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Preload: The CD designation signifies a preloaded bearing, which eliminates internal clearance. This results in significantly increased stiffness, reduced vibration, and enhanced rotational accuracy under load.
- Superior Load Capacity: The optimized 15° contact angle and robust construction enable the bearing to handle high combined (radial and axial) loads efficiently.
- Optimized High-Speed Performance: The lightweight, durable phenolic resin cage ensures stable operation and low friction at high rotational speeds, contributing to a limiting speed of 18,000 rpm.
- Precision Engineering: Manufactured to P4 precision class with tight dimensional tolerances on bore, outside diameter, and width, guaranteeing consistent, high-performance operation.
- Sealed & Lubricated: The bearing comes sealed and pre-lubricated, protecting against contamination and providing long-term, maintenance-free service within its specified temperature range.
S7208 CD/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance machinery where accuracy and rigidity are paramount. Key applications include:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Motors and Precision Gearboxes
- Industrial Pumps and Compressors
- Precision Measuring Instruments and Robotic Drives
