71920 ACB/HCP4ATT
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 71920 ACB/HCP4ATT is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This triplex tandem (3-DT) matched set configuration delivers superior axial rigidity and load-carrying capacity. Engineered with a 25° contact angle and ceramic ball construction, it is optimized for high-speed operation up to 15,000 rpm. The combination of P4A tolerance class and phenolic cage ensures reliable performance in precision machinery and high-rigidity systems.
71920 ACB/HCP4ATT Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Advantage |
|---|---|---|
| ACB | 25° Contact Angle | Optimized for combined radial and axial loads |
| HCP4A | P4A Tolerance Class | Ultra-precision running accuracy |
| TT | Triplex Tandem Arrangement | Maximum axial stiffness and load capacity |
Structural Features and Performance Benefits
Enhanced Rigidity: The triplex tandem arrangement provides exceptional axial stiffness, making it ideal for applications requiring minimal deflection under heavy loads.
Superior Load Capacity: With a radial dynamic load rating of 9,945 lbf and static load rating of 14,175 lbf, this bearing set handles significant combined loads efficiently.
High-Speed Performance: The combination of ceramic balls and phenolic cage enables operation at limiting speeds of 15,000 rpm, reducing centrifugal forces and heat generation.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control (bore tolerance: -0.004mm to 0), ensuring consistent performance in precision applications.
71920 ACB/HCP4ATT Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and grinding spindles
- Aerospace Systems - Jet engine components and flight control mechanisms
- Medical Equipment - High-speed dental handpieces and surgical tools
- Robotics - Precision robotic arms and automation systems
- Semiconductor Manufacturing - Wafer handling equipment and precision positioning systems
