S71920 CD/HCP4AQBCA
Hybrid Ceramic Super Precision Bearings
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S71920 CD/HCP4AQBCA Bearing Product Overview & Core Advantages
The S71920 CD/HCP4AQBCA is a high-precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This sealed metric bearing is configured in a back-to-back quadruplex (QBC) arrangement, delivering superior stability and the ability to handle combined loads (radial and axial) from multiple directions simultaneously. Manufactured to an ultra-precise P4A tolerance class and featuring ceramic balls, it is engineered for high-speed operation and long-term reliability in critical machinery.
S71920 CD/HCP4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning | Significance |
|---|---|---|
| S71920 CD | Bearing series and size designation | Indicates a 100mm bore, 140mm OD, 80mm width precision bearing. |
| HC | Hybrid Ceramic | Signifies the use of ceramic balls, which reduce friction, allow for higher speeds, and provide longer service life. |
| P4A | Tolerance Class | Denotes an ultra-high precision grade with tight running accuracy and dimensional tolerances. |
| QBC | Quadruplex Back-to-Back | Specifies a matched set of four bearings in a back-to-back arrangement, providing maximum rigidity and moment load capacity. |
| Sealed | Seal Type | Prevents contamination and retains lubricant, ensuring consistent performance and reduced maintenance. |
S71920 CD/HCP4AQBCA Bearing Structural Features & Performance Benefits
Exceptional Rigidity and Load Capacity: The quadruplex back-to-back (QBC) configuration creates an extremely stiff bearing system, capable of withstanding heavy combined loads and significant moment loads. This makes it ideal for applications where shaft deflection must be minimized.
High-Speed Performance: The combination of hybrid ceramic balls and a lightweight phenolic cage significantly reduces centrifugal forces and friction, enabling a high limiting speed of 16,250 rpm. The 15° contact angle is optimized for high-speed axial load support.
Precision and Longevity: Manufactured to P4A tolerance class with a preload of "Extra light / Class A," this bearing ensures smooth, quiet, and precise rotation. The integral seals protect the precision bearing assembly from contaminants, while the pre-applied grease lubrication offers reliable operation across a wide temperature range from -30°C to 110°C.
S71920 CD/HCP4AQBCA Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Robotic arm joints and high-accuracy automation systems.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical navigation components.
- Medical Equipment: High-speed dental handpieces and advanced imaging devices.
- High-Frequency Motors and Spindles: Where minimal runout and high dynamic response are required.
