S7208 CDGC/P4A
Sealed Super Precision Angular Contact Ball Bearings
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S7208 CDGC/P4A Bearing Product Overview & Core Advantages
The S7208 CDGC/P4A is a precision single-row angular contact ball bearing designed for applications demanding high rotational accuracy and rigidity. Positioned in the P4A tolerance class, it offers exceptional dimensional stability and running accuracy. Its key advantage lies in its ability to support combined loads (radial and axial) efficiently, making it ideal for high-speed spindles and precision machinery. The universal matching (SU) design allows for flexible mounting arrangements in pairs to achieve the required preload and stiffness.
S7208 CDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7208 | Basic bearing designation, indicating a 40mm bore, 80mm OD, 18mm width angular contact bearing. |
| CD | Contact angle of 15°, optimized for high-speed operation and moderate axial load capacity. |
| GC | Indicates a Moderate / Class C preload for enhanced rigidity and reduced deflection under load. |
| P4A | The tolerance class, signifying very high precision with tight control over bore, OD, and width tolerances. |
S7208 CDGC/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: Manufactured to P4A tolerance class with a phenolic cage, this bearing ensures minimal runout and high dimensional stability, crucial for precision applications. The 15° contact angle and Moderate (C) preload provide excellent stiffness, minimizing axial and radial play under operational loads.
Superior Load Capacity: With a dynamic load rating of 7605 lbf and a static load rating of 5400 lbf, it reliably handles significant combined radial and axial loads.
Optimized High-Speed Performance: The lightweight phenolic cage and optimized internal geometry contribute to a high limiting speed of 41,000 rpm, making it suitable for high-speed spindles.
Sealed and Lubricated for Life: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is maintenance-free within its specified temperature range of -30°C to 110°C.
S7208 CDGC/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles.
- Precision Rotary Systems: Industrial robots, rotary tables.
- High-Speed Motors and Pumps: Where high rotational accuracy and reliability are required.
- Medical and Dental Equipment: High-speed handpieces and precision instruments.
