71920 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71920 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The 71920 CD/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This universal matchable bearing features a 15° contact angle and an extra light preload (Class A), making it ideal for high-speed spindles and precision machinery. Its ceramic ball construction and P4A super-precision tolerance ensure superior rigidity, reduced friction, and extended service life under combined radial and axial loads.
71920 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
| 71920 | Basic bearing series with 100mm bore, 140mm OD |
| CD | Universal matchable bearing design (15° contact angle) |
| HC | Hybrid ceramic balls for enhanced performance |
| P4A | Super precision tolerance class |
| DGA | Extra light preload (Class A) |
71920 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces friction, heat generation, and wear, enabling higher limiting speeds (16,000 rpm) and longer service life.
Precision Phenolic Cage: The phenolic resin cage provides excellent dimensional stability at high speeds, contributing to smooth operation and reduced vibration.
Universal Matchable Design: As a Universal Matchable (SU) bearing, it can be paired in any combination to create precisely preloaded sets, simplifying installation and optimizing system stiffness.
Super-Precision Performance: The P4A tolerance class and tight dimensional controls ensure minimal runout and superior rotational accuracy for critical applications.
71920 CD/HCP4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers
- Precision Medical Equipment: Dental handpieces, surgical tools
- Aerospace Systems: Gyroscopes, navigation instruments
- Semiconductor Manufacturing: Wafer handling robots, precision stages
- High-Speed Automation: Robotics, CNC machining centers
