S71918 CEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S71918 CEGA/HCP4A Bearing Product Overview & Core Advantages
The S71918 CEGA/HCP4A is a super-precision angular contact ball bearing designed for the most demanding high-speed and high-rigidity applications. Engineered to a P4A tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its unique combination of a ceramic ball material and phenolic cage enables superior performance at high rotational speeds, while its extra light preload (Class A) ensures smooth operation with minimal friction. This bearing is universally matchable (SU), allowing for precise axial play adjustment when mounted in pairs, making it ideal for applications requiring extreme precision and reliability under combined radial and axial loads.
S71918 CEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
- S7: High-precision bearing series for high-speed applications.
- 1918: Standard size designation (Bore: 90mm, OD: 125mm, Width: 18mm).
- C: 15° contact angle.
- E: Optimized internal design for high speed.
- GA: Grease lubrication.
- HC: Hybrid Ceramic (Steel rings with Ceramic balls).
- P4A: Tolerance class superior to ABEC 7, with enhanced running accuracy requirements.
S71918 CEGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces centrifugal forces, lowers operating temperature, and extends service life, especially in high-speed applications.
- Phenolic Resin Cage: This lightweight and robust cage material contributes to excellent high-speed performance, low friction, and superior acceleration characteristics.
- High Rigidity & Load Capacity: The angular contact design and extra light preload provide high system rigidity, enabling the bearing to handle significant combined loads (radial and axial) simultaneously.
- Super-Precision P4A Tolerance: Guarantees extremely tight dimensional and running accuracy, resulting in minimal vibration and superior performance in precision spindles.
- Sealed & Grease Lubricated: The sealed design with factory-applied grease offers long-term, maintenance-free operation within the specified temperature range of -30°C to 110°C.
S71918 CEGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing spindles.
- High-Frequency Motors and turbomachinery.
- Aerospace instrumentation and auxiliary systems.
- Medical Equipment such as high-speed dental handpieces.
