S7208 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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S7208 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The S7208 ACDGA/HCP4A is a high-precision double row angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and reliability. This sealed bearing features a 25° contact angle and an Extra Light (A) preload, enabling it to simultaneously handle combined radial and axial loads from both directions. Its compact design, utilizing ceramic balls and a phenolic cage, is optimized for high-speed operation up to 41,000 rpm, making it an ideal solution for high-performance spindle systems and other precision machinery.
S7208 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| AC | Angular Contact | Optimized for combined loads. |
| DGA | Double Row, "A" Preload | Provides high rigidity and precise running accuracy. |
| HC | Hybrid Ceramic (Ceramic Balls) | Reduced weight, lower friction, and extended service life at high speeds. |
| P4A | High Precision Tolerance Class | Superior dimensional and running accuracy for critical applications. |
S7208 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The double row design significantly increases the bearing's rigidity, allowing it to withstand substantial combined loads and moments. The specified Extra Light preload eliminates internal clearance, ensuring precise shaft positioning and smooth operation under load.
Superior High-Speed Performance: The combination of lightweight ceramic balls and a phenolic resin cage reduces centrifugal forces and friction, enabling the bearing to achieve its high limiting speed of 41,000 rpm. This makes it a premier choice for high-speed spindles.
Sealed and Pre-Lubricated for Longevity: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is effectively maintenance-free throughout its service life within the specified temperature range of -30°C to 110°C.
S7208 ACDGA/HCP4A Bearing Typical Application Areas
The S7208 ACDGA/HCP4A is ideally suited for high-precision, high-speed machinery, including:
- Machine Tool Spindles (CNC milling, grinding, and turning centers)
- High-Frequency Motors and Spindles
- Precision Robotics and Automation Equipment
- Medical and Dental Equipment Spindles
- Aerospace Instrumentation and Guidance Systems
