S71909 CEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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S71909 CEGA/HCP4A Bearing Product Overview & Core Advantages
The S71909 CEGA/HCP4A is a precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single bearing features an Extra Light (A) preload and meets ABEC 7/P4A super-precision tolerance standards, ensuring minimal runout and vibration. Its ceramic balls and optimized 15° contact angle deliver superior high-speed capability and stiffness, while the sealed design with grease lubrication provides long-term, maintenance-free operation. This bearing is universally matchable (SU), allowing for flexible arrangement in sets to handle combined radial and axial loads efficiently.
S71909 CEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Series designation for high-precision angular contact ball bearings. |
| 1909 | Bore diameter: 45 mm, Outside diameter: 68 mm, Width: 12 mm. |
| CE | Contact angle of 15°. |
| GA | Universal Matchable bearing (can be paired in any combination). |
| HC | Hybrid Ceramic bearing (steel rings with ceramic balls). |
| P4A | Super precision tolerance class (equivalent to ABEC 7). |
S71909 CEGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and enables higher limiting speeds (46,000 rpm). Ceramic balls also provide superior corrosion resistance and electrical insulation.
- High Rigidity & Precision: Manufactured to P4A tolerance class with an Extra Light preload (Class A), this bearing offers exceptional running accuracy and stiffness, minimizing deflection under load for superior positional control.
- Optimized Lubrication & Sealing: Pre-lubricated with high-performance grease, the bearing is ready for immediate use. The integral seals protect against contamination, ensuring long service life and reliable performance within a temperature range of -30°C to 110°C.
- Phenolic Resin Cage: The lightweight and robust phenolic cage ensures stable operation at high speeds, contributes to lower inertia, and offers excellent dimensional stability.
S71909 CEGA/HCP4A Bearing Typical Application Areas
The S71909 CEGA/HCP4A is ideally suited for high-performance machinery requiring extreme precision and speed:
- High-Frequency CNC Spindles for milling, grinding, and drilling
- Precision Machine Tool Axles and rotary tables
- High-Speed Motors and servo drives
- Aerospace & Defense Instrumentation (gyroscopes, navigation systems)
- Medical Equipment (dental handpieces, laboratory centrifuges)
- Semiconductor Manufacturing Equipment
