S7008 CDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Ball & Washer Dimensions
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S7008 CDGB/HCP4A Bearing Product Overview & Core Advantages
The S7008 CDGB/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional speed capabilities and rigidity. Engineered with a 15° contact angle and Universal Matchable (SU) design, this bearing is optimized to handle combined radial and axial loads simultaneously. Its construction using ceramic balls and a phenolic cage enables superior high-speed performance, reaching limiting speeds of 41,000 rpm, while the P4A tolerance class ensures extreme running accuracy. Pre-loaded as a Light / Class B matched set, it delivers outstanding operational stability and is ideal for high-reliability, precision machinery.
S7008 CDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| S7008 | Bearing series and size designation (40mm bore, 68mm OD, 15mm width) | Defines the compact bearing dimensions and series characteristics. |
| CD | 15° contact angle and Universal Matchable (SU) designation | Enables optimal performance under combined loads and allows for precise bearing arrangement. |
| GB | Light preload (Class B) | Reduces deflection and vibration, enhancing rigidity and positioning accuracy. |
| HC | Hybrid Ceramic (Silicon Nitride balls) | Reduces centrifugal forces, lowers friction, and enables higher limiting speeds and longer service life. |
| P4A | High-Precision Tolerance Class (ABEC 7 / ISO P4) | Guarantees extremely tight dimensional and running accuracy for precision applications. |
S7008 CDGB/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The use of ceramic balls significantly reduces weight and inertial forces compared to steel, which is critical for ultra-high-speed operation. This results in lower operating temperatures, reduced wear, and extended lubrication life.
Phenolic Resin Cage: The lightweight and robust phenolic cage provides excellent guidance for the ceramic balls, ensuring stable operation at high speeds and offering good resistance to centrifugal forces.
High Rigidity and Load Capacity: The angular contact design and light preload provide high system rigidity, minimizing axial and radial play. This allows the bearing to effectively support combined radial and axial loads with high precision.
Sealed & Grease-Lubricated: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is effectively maintenance-free for the duration of its service life within the specified temperature range (-30°C to 110°C).
S7008 CDGB/HCP4A Bearing Typical Application Areas
The S7008 CDGB/HCP4A is ideally suited for high-performance machinery where speed, precision, and reliability are paramount. Key application areas include:
- High-Frequency Machine Tool Spindles for milling, grinding, and drilling
- Precision Robotic Drives and Servo Motors
- High-Speed Turbomachinery such as compressors and small turbines
- Advanced Medical and Laboratory Equipment (e.g., centrifuges, dental handpieces)
- Aerospace Actuation Systems and instrumentation
