S7208 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S7208 CDGA/HCP4A Bearing Product Overview & Core Advantages
The S7208 CDGA/HCP4A is a high-precision, single-row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and speed. Its core advantages stem from its P4A super-precision tolerance class and ceramic ball construction, enabling superior performance in high-speed spindle systems. This bearing is designed to accommodate primarily axial loads in one direction and can also support combined radial and axial loads. The combination of a phenolic cage and premium grease lubrication ensures reliable operation at its high limiting speed, making it an ideal choice for machine tools and other precision equipment where high rigidity and minimal rotational error are critical.
Model Code Breakdown
| Model Segment | Technical Meaning |
|---|---|
| S7208 | Basic bearing series designation, indicating a 40mm bore diameter. |
| CD | Contact angle of 15°. |
| G | Indicates the bearing is universally matchable (SU), allowing for flexible mounting arrangements in pairs. |
| A | Signifies an Extra Light (Class A) preload for enhanced rigidity and precise rotational accuracy. |
| HCP4A | Denotes a sealed bearing (HC) manufactured to P4A super-precision tolerance standards. |
S7208 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The phenolic resin cage and ceramic balls (Si3N4) significantly reduce centrifugal forces and friction, directly contributing to the high limiting speed of 41,000 rpm. This makes it a premier high-speed bearing solution.
- Precision & Rigidity: Manufactured to P4A tolerance class with tight dimensional control on the bore diameter and outside diameter. The 15° contact angle and Class A preload provide high system stiffness, minimizing deflection under load.
- Superior Load Capacity: With a dynamic load rating of 7605 lbf and a static load rating of 5400 lbf, this bearing is designed to handle significant combined loads reliably.
- Sealed & Lubricated for Life: The integral seals protect against contamination, and the factory-applied grease lubrication is suitable for the specified temperature range (-30°C to 110°C), offering a maintenance-free service life in many applications.
S7208 CDGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Instrumentation: Measuring devices, optical scanners, and laboratory equipment.
- High-Speed Motors & Drives: Electric spindles and high-frequency motor applications.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical rotational mechanisms.
