S71918 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S71918 CD/HCP4A Bearing Product Overview & Core Advantages
The S71918 CD/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered with a 15° contact angle and P4 (ABEC-7) tolerance class, it delivers superior running accuracy and high-speed capability. Its ceramic balls and phenolic cage contribute to reduced friction, lower operating temperatures, and extended service life, making it an ideal solution for high-rigidity spindles and precision machinery.
S71918 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | High-precision angular contact bearing series |
| 1918 | Bore diameter: 90 mm, Outside diameter: 125 mm, Width: 18 mm |
| CD | 15° contact angle and optimized internal design |
| HC | Hybrid ceramic balls (steel rings with ceramic balls) |
| P4 | P4 (ABEC-7) precision tolerance class |
| A | Preload level designation |
S71918 CD/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, enabling higher limiting speeds (13,000 rpm) and providing electrical insulation properties. This construction also offers superior wear resistance and longer bearing service life.
Phenolic Cage Design: The phenolic resin cage provides excellent dimensional stability at high speeds, reduced weight for lower inertia, and inherent lubrication properties that contribute to the bearing's high-speed performance.
Precision Engineering: Manufactured to P4 tolerance class with tight dimensional tolerances (bore: -0.008mm to 0, OD: -0.009mm to 0), this bearing ensures minimal runout and vibration for applications requiring high rotational accuracy.
Optimized Load Capacity: With a radial dynamic load rating of 10,688 lbf and radial static load rating of 11,475 lbf, this bearing can handle significant combined loads while maintaining precision.
S71918 CD/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- High-Speed Motors: Servo motors, spindle motors, and high-frequency applications
- Aerospace Components: Guidance systems, avionics, and precision positioning mechanisms
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
