S7004 CE/HCP4ADBB
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The S7004 CE/HCP4ADBB is a precision duplex angular contact ball bearing set designed for demanding applications requiring high rigidity and exceptional running accuracy. This matched back-to-back (DB) arrangement is preloaded to Class B (Light) standards, providing superior system stiffness and minimizing axial and radial runout. Its construction, featuring a phenolic cage and ceramic balls, is optimized for high-speed operation and the ability to handle significant combined loads (radial and axial). This bearing set is a premier choice for high-precision, high-reliability spindles and machinery.
S7004 CE/HCP4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| S7004 | Series and size designation (20mm bore, 42mm OD). | Defines the core bearing dimensions. |
| C | 15° Contact Angle. | Optimized for high-speed performance with good axial load capacity. |
| E | Optimized internal design. | Enhances speed capability and reduces noise and vibration. |
| HC | Hybrid Ceramic (Silicon Nitride balls). | Reduces centrifugal forces, enabling higher speeds, lower operating temperature, and longer service life. |
| P4A | Tolerance Class P4A (equivalent to ABEC 7). | Guarantees extremely tight dimensional and running accuracy for precision applications. |
| DB | Duplex Back-to-Back matched set. | Provides high rigidity and can withstand moment loads. |
| B | Light Preload (Class B). | Eliminates internal clearance for precise shaft positioning and improved system stiffness. |
Structural Features and Performance Benefits
High Rigidity and Moment Load Capacity: The back-to-back (DB) duplex arrangement creates a wide effective spread, significantly increasing the bearing set's resistance to moment loads and providing exceptional high rigidity for the entire spindle system.
Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls drastically reduces centrifugal forces and inertial mass. This allows the S7004 CE/HCP4ADBB to achieve a high limiting speed of 100,000 rpm with minimal heat generation.
Enhanced Precision and Life: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration. The hybrid ceramic design offers superior resistance to wear and a longer operational life, especially in demanding conditions.
Sealed and Lubricated for Reliability: As a sealed bearing, it is protected from contamination and is pre-lubricated with grease suitable for its specified temperature range, ensuring long-term, maintenance-free operation.
S7004 CE/HCP4ADBB Bearing Typical Application Areas
- High-Frequency CNC Spindles for milling, grinding, and drilling
- Precision Machine Tool Main Spindles
- High-speed Robotic Arm Drives
- Dental and Medical Handpiece Motors
- High-performance Turbochargers and Compressors
