S71920 CE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
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S71920 CE/HCP4ADGA Bearing Product Overview & Core Advantages
The S71920 CE/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. As a universal matchable (SU) bearing supplied in a pre-matched set of two, it enables simplified installation and optimal performance in high-speed configurations. Its ceramic ball construction and P4A super-precision tolerance class deliver superior rotational accuracy, reduced friction, and extended service life, making it ideal for machine tool spindles and other precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S71920 | Precision angular contact ball bearing series with 100mm bore, 140mm OD, 40mm width |
| CE | Ceramic balls (typically silicon nitride) for reduced weight, lower friction, and higher speed capability |
| HC | Enhanced phenolic cage design optimized for high-speed operation |
| P4A | Super precision tolerance class exceeding ABEC 7 standards for exceptional running accuracy |
| DGA | Universal matchable bearing set with extra light preload (Class A) |
S71920 CE/HCP4ADGA Bearing Structural Features & Performance Benefits
High-Speed Capability: The combination of ceramic balls and phenolic cage significantly reduces centrifugal forces and operating temperatures, enabling a limiting speed of 16,250 rpm. This makes the bearing exceptionally suited for high-speed spindle applications.
Precision Performance: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, this bearing ensures minimal runout and vibration for superior machining quality and surface finish.
Rigidity & Load Capacity: The 15° contact angle and universal matching design allow for precise axial positioning and high system rigidity when mounted in pairs. With a dynamic load rating of 14,332 lbf and static load rating of 14,175 lbf, it reliably handles combined radial and axial loads.
Thermal Stability: The phenolic cage provides excellent dimensional stability across the operating temperature range of -30°C to 110°C, maintaining consistent performance under varying thermal conditions.
S71920 CE/HCP4ADGA Bearing Typical Application Areas
This precision bearing is specifically engineered for applications requiring high rotational accuracy, speed, and reliability:
- Machine Tool Spindles: CNC machining centers, grinding spindles, and milling spindles
- High-Speed Motors: Precision electric motors and servo drives
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Medical Equipment: Dental handpieces, surgical tools, and imaging systems
- Semiconductor Manufacturing: Wafer handling robots and precision positioning stages
