71920 CE/HCP4AQBCA
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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71920 CE/HCP4AQBCA Bearing Product Overview & Core Advantages
The 71920 CE/HCP4AQBCA is a high-precision quadruplex angular contact ball bearing designed for the most demanding applications requiring exceptional rigidity and accuracy. This P4A tolerance class bearing features a back-to-back quadruplex arrangement, enabling it to withstand combined loads (substantial radial and axial loads in both directions) with superior stability. Its construction with ceramic balls and a phenolic cage contributes to lower friction, higher limiting speeds, and extended service life, making it an ideal choice for high-performance machinery.
71920 CE/HCP4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| 71920 | Basic bearing series and size code (Bore: 100mm, OD: 140mm, Width: 80mm) |
| CE | Contact angle of 15°, optimized for high axial load capacity |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls for enhanced speed and durability |
| P4A | High-Precision Tolerance Class, exceeding ABEC 7/ISO P4 standards for running accuracy |
| QBC | Quadruplex Back-to-Back arrangement. A set of four bearings pre-configured for maximum rigidity and moment load resistance. |
71920 CE/HCP4AQBCA Bearing Structural Features & Performance Benefits
Exceptional Rigidity and Load Capacity: The quadruplex back-to-back (QBC) arrangement creates an extremely rigid bearing system, capable of handling heavy combined loads and significant moment loads. This design is crucial for applications where shaft deflection must be minimized.
High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a very high limiting speed of 16,000 rpm. This makes the bearing suitable for high-speed spindles and other rapid-rotation equipment.
Pre-Configured Precision Set: As a universal matched set, the four bearings are manufactured and selected to work together seamlessly, ensuring optimal preload and performance without the need for custom shimming or adjustment by the end-user.
Superior Material Selection: The use of chrome steel rings provides high strength and wear resistance, while the ceramic balls offer electrical insulation, reduced thermal expansion, and longer lubrication life.
71920 CE/HCP4AQBCA Bearing Typical Application Areas
This high-precision, high-rigidity bearing is engineered for advanced machinery where accuracy and reliability are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and rotary actuators requiring high moment stiffness.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and other critical rotating assemblies.
- High-Frequency Motors and Spindles: Where extreme rotational speeds and precision are required.
