S7004 CEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S7004 CEGA/HCP4A Bearing Product Overview & Core Advantages
The S7004 CEGA/HCP4A is a high-precision, double row angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. As a Universal Matchable (SU) bearing supplied in a set of four, it enables simplified installation and optimal preload configuration. Its core advantages include the ability to simultaneously handle combined loads (radial and bidirectional axial loads), superior high-speed performance facilitated by a phenolic cage and ceramic balls, and long service life due to its sealed and pre-lubricated design. This bearing is engineered for high rigidity and stable operation in demanding environments.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S7004 | Basic bearing series and size designation (20mm bore, 42mm OD). |
| CE | Indicates a 15° contact angle and specific internal design. |
| GA | Specifies an Extra Light preload (Class A). |
| HC | Denotes the use of Hybrid Ceramic balls (Silicon Nitride). |
| P4A | Specifies a high-precision tolerance class (superior to ABEC 7). |
S7004 CEGA/HCP4A Bearing Structural Features & Performance Benefits
- Double Row Design & High Rigidity: The two rows of balls provide a wide effective spread, resulting in a very high rigidity support that minimizes shaft deflection under load.
- Superior Load Capacity: Engineered to handle significant combined loads, including radial loads and bidirectional axial loads, thanks to its angular contact design.
- Exceptional High-Speed Performance: The lightweight phenolic cage and low-density ceramic balls reduce centrifugal forces, enabling a high limiting speed of 100,000 rpm. This combination also reduces operating temperature and wear.
- Precision & Longevity: The P4A tolerance class ensures minimal runout and vibration for precise applications. The integral seals retain grease and protect against contamination, offering a long, maintenance-free service life.
S7004 CEGA/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications where speed, accuracy, and reliability are critical. Typical uses include:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Instrumentation
- High-Frequency Motors and Spindles
- Aerospace & Defense Systems
- Semiconductor Manufacturing Equipment
