71938 CD/HCP4ATBTA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
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71938 CD/HCP4ATBTA Bearing Product Overview & Core Advantages
The 71938 CD/HCP4ATBTA is a precision angular contact ball bearing designed for the most demanding applications. This triplex back-to-back (TBT) matched set delivers exceptional system rigidity and stability, capable of handling complex combined loads including high radial and bidirectional axial loads. Manufactured to P4A super-precision tolerance and featuring ceramic balls, it is engineered for superior performance in high-speed and high-accuracy environments, offering extended service life and reliable operation.
Model Code Breakdown
- 71938: Basic bearing series and size designation (190mm bore, 260mm OD).
- CD: Contact angle of 15°.
- HC: Hybrid Ceramic construction (steel rings with ceramic balls).
- P4A: Super-precision tolerance class, exceeding ABEC 7/ISO P4 standards.
- TBT: Triplex Back-to-Back matched arrangement of three bearings.
- A: Extra light preload designation.
71938 CD/HCP4ATBTA Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The triplex back-to-back (TBT) configuration creates an extremely rigid bearing system, effectively resisting moment loads and providing superior shaft positioning accuracy. This design significantly enhances the dynamic load rating of the assembly.
High-Speed & Thermal Stability: The combination of ceramic balls (lower density, reduced centrifugal force) and a phenolic resin cage enables exceptional limiting speeds. This hybrid construction also reduces friction and heat generation, ensuring stable performance across the specified temperature range.
Precision and Longevity: Manufactured to P4A tolerance class, this bearing ensures minimal runout and vibration. The open seal type allows for optimized lubrication management in controlled environments, contributing to a long and maintenance-free operational life under proper conditions.
71938 CD/HCP4ATBTA Bearing Typical Application Areas
This high-performance bearing is ideally suited for applications requiring the ultimate in precision, speed, and rigidity, such as:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Machining Centers
- Aerospace & Defense Systems
- Advanced Robotics and Automation
