S71918 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The S71918 CD/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This matched bearing set features a universal matchable (SU) design, allowing two bearings to be mounted in any combination to achieve the required preload and stiffness. Its construction with ceramic balls and a phenolic cage enables superior high-speed performance and reduced rotational mass. Engineered to handle combined loads (radial and axial) simultaneously, this bearing is ideal for high-reliability machinery where precision and long service life are critical.
S71918 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| 719 | High-precision angular contact ball bearing series |
| 18 | Bore diameter code (90 mm) |
| CD | 15° contact angle and universal matchable (SU) design |
| HC | Hybrid ceramic balls (silicon nitride) |
| P4A | High-precision tolerance class (equivalent to ABEC 7) |
| DGA | Sealed on both sides with high-performance grease |
Structural Features and Performance Benefits
Hybrid Ceramic Design: The use of ceramic balls significantly reduces centrifugal forces and friction, enabling higher limiting speeds (15,000 rpm) and providing superior performance in high-temperature environments compared to all-steel bearings.
High Rigidity and Precision: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration. The universal matchable (SU) arrangement allows for precise preload control when mounted in pairs, delivering optimal system stiffness.
Optimized for Combined Loads: With a 15° contact angle, the bearing is engineered to efficiently handle combined radial and axial loads, making it suitable for applications with complex loading conditions.
Advanced Cage and Sealing: The phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at high speeds. The integrated seals (DGA) retain grease and effectively exclude contaminants, ensuring long-term, maintenance-free operation.
S71918 CD/HCP4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines.
- Precision Instrumentation: Measuring equipment, optical scanners, and coordinate measuring machines (CMM).
- High-Speed Motors and Drives: Servo motors, spindle drives, and robotics.
- Aerospace and Defense Systems: Gyroscopes, navigation systems, and actuator mechanisms.
- Medical Equipment: Dental handpieces, high-speed centrifuges, and imaging devices.
