S71917 CEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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S71917 CEGA/HCP4A Bearing Product Overview & Core Advantages
The S71917 CEGA/HCP4A is a super-precision double row angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and rigidity. This P4A tolerance class bearing features a universal matching (SU) designation, allowing two bearings to be precisely paired for optimal performance. Its core advantages include the ability to simultaneously support combined loads (radial and bidirectional axial loads), superior high-speed capability facilitated by a phenolic cage and ceramic balls, and long-term reliability with its sealed and pre-lubricated design. This compact and lightweight bearing is the ideal solution for high-precision, high-reliability spindle applications.
S71917 CEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71917 | Denotes the bearing series and size (85mm bore, 120mm OD, 18mm width). |
| CE | Indicates a 15° contact angle and specific internal design. |
| GA | Signifies a Universal Matchable (SU) bearing supplied in a set of 2 with an Extra light (A) preload. |
| HCP4A | Defines the tolerance class P4A (very high precision) and the use of a phenolic cage. |
S71917 CEGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row angular contact design provides superior radial and axial stiffness, enabling it to handle significant combined loads from multiple directions with minimal deflection.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls reduces centrifugal forces, allowing for a high limiting speed of 17,000 rpm. The optimized 15° contact angle further enhances high-speed stability.
- Enhanced Durability & Thermal Stability: Ceramic balls offer reduced wear, higher corrosion resistance, and lower thermal expansion compared to steel, contributing to consistent performance and longer service life.
- Maintenance-Free Operation: The bearing is sealed and pre-lubricated with grease, protecting against contamination and providing long-term lubrication within its specified temperature range of -30°C to 110°C.
S71917 CEGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for electric motors operating at very high RPMs.
- Medical Equipment: High-speed rotors in dental handpieces and laboratory centrifuges.
