71940 CD/HCP4ATGA
Hybrid Ceramic Super Precision Bearings
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71940 CD/HCP4ATGA Bearing Product Overview & Core Advantages
The 71940 CD/HCP4ATGA is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and reliability. This universally matchable (SU) bearing is designed to accommodate combined radial and axial loads simultaneously. Its key advantages stem from a P4A super-precision tolerance class, a ceramic ball construction, and an extra light preload (Class A), making it ideally suited for high-speed spindle applications where minimal deflection and maximum rotational accuracy are critical.
71940 CD/HCP4ATGA Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning | Significance |
|---|---|---|
| 71940 | Bearing series and size code | Denotes a high-precision, 200mm bore angular contact bearing. |
| CD | Contact angle of 15° | Optimized for high-speed operation and axial load capacity. |
| HC | Hybrid Ceramic | Indicates the use of ceramic balls, which reduce friction, weight, and heat generation, enabling higher limiting speeds. |
| P4A | Tolerance Class | Signifies super-precision dimensional and running accuracy, exceeding ABEC 7/ISO P4 standards. |
| T | Phenolic Cage | A lightweight, robust cage material ideal for high-speed performance and low friction. |
| GA | Universal Matchable (SU) | Bears can be mounted in any combination (back-to-back, face-to-face, or tandem) without pre-set preload, offering flexibility in mounting arrangements. |
71940 CD/HCP4ATGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Design: The use of silicon nitride (Si3N4) ceramic balls provides significant performance enhancements. This results in lower centrifugal forces, reduced operating temperatures, and extended service life, particularly at the high limiting speed of 6,300 rpm.
High Rigidity & Load Capacity: The 15° contact angle and precision-ground raceways are designed to provide high system rigidity and reliably handle the specified dynamic (101,025 lbf) and static (180,000 lbf) load ratings.
Super-Precision Performance: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for achieving superior surface finishes and positional accuracy in precision machinery.
Optimized for High-Speed: The combination of the lightweight phenolic cage, ceramic balls, and optimized internal geometry collectively contribute to its exceptional high-speed capability.
71940 CD/HCP4ATGA Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles: CNC machining centers, grinding spindles, and milling spindles.
- High-Speed Motors: Motors and drives requiring minimal vibration and high rotational accuracy.
- Precision Equipment: Semiconductor manufacturing equipment, coordinate measuring machines (CMM).
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical rotating assemblies.
