S7017 CEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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S7017 CEGA/HCP4A Bearing Product Overview & Core Advantages
The S7017 CEGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional speed, rigidity, and accuracy. Engineered as a universally matchable single bearing, it is intended to be mounted in pairs to handle combined radial and axial loads simultaneously. Its core advantages stem from a P4A super-precision tolerance class, a ceramic ball construction, and a phenolic resin cage, enabling superior high-speed performance, reduced weight, and excellent operational stability in high-rigidity spindle arrangements.
S7017 CEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning | Significance & Benefit |
|---|---|---|
| S7017 | Basic bearing series designation (85mm bore, 130mm OD, 22mm width). | Defines the core bearing dimensions. |
| CE | 15-degree contact angle. | Optimized for high-speed operation with moderate axial load capacity. |
| GA | Light preload (Class A). | Reduces runout and increases system rigidity for enhanced precision. |
| HC | Hybrid Ceramic (Silicon Nitride balls). | Provides lower density for higher limiting speeds, reduced friction, and longer service life. |
| P4A | Tolerance class superior to ABEC 7 / ISO P4. | Ensures ultra-high precision running accuracy for the most demanding applications. |
S7017 CEGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The use of ceramic balls significantly reduces centrifugal forces, allowing for a higher limiting speed (28,000 rpm). This construction also offers superior resistance to wear and thermal degradation.
Phenolic Resin Cage: The lightweight and robust phenolic cage contributes to smooth operation at high speeds, offers excellent strength, and provides inherent lubrication compatibility.
Super-Precision Tolerances: The P4A tolerance class and tight dimensional control (bore/OD tolerance: -0.004mm to 0) guarantee minimal runout and vibration, which is critical for achieving high surface finishes and positioning accuracy.
Optimized Load Capacity: With a 15-degree contact angle and universal matching (SU) design, these bearings can be paired in duplex sets to reliably support combined loads, providing high system rigidity and axial stability.
S7017 CEGA/HCP4A Bearing Typical Application Areas
The S7017 CEGA/HCP4A is ideally suited for high-performance machinery where precision, speed, and reliability are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for electric motors requiring ultra-high rotational speeds.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
