71906 CD/HCP4ADBD
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71906 CD/HCP4ADBD Bearing Product Overview & Core Advantages
The 71906 CD/HCP4ADBD is a precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This duplex back-to-back (DB) arrangement is preloaded to Class D (Heavy), providing superior stiffness and minimal axial/radial runout. Its construction with a ceramic ball and phenolic cage enables outstanding high-speed performance, with a limiting speed of 100,500 rpm. This bearing is engineered to handle combined loads efficiently, making it ideal for high-precision, high-rigidity spindles and machinery.
Model Code Deep Explanation
| Code Segment | Technical Meaning |
|---|---|
| 71906 | Basic bearing series and size designation (30mm bore, 47mm OD) |
| C | 15° contact angle |
| D | Heavy preload (Class D) |
| HC | Hybrid Ceramic (Silicon Nitride balls) |
| P4A | High-precision tolerance class (superior to ABEC 7) |
| DB | Duplex Back-to-Back arrangement (two bearings matched) |
71906 CD/HCP4ADBD Bearing Structural Features & Performance Benefits
Enhanced Rigidity: The duplex back-to-back configuration with heavy preload creates an exceptionally rigid bearing system, capable of withstanding high moment loads while maintaining precise shaft positioning.
Superior High-Speed Capability: The combination of ceramic balls (lower density, reduced centrifugal force) and a phenolic resin cage (lightweight, self-lubricating) enables stable operation at extreme rotational speeds up to 100,500 rpm.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, ensuring minimal runout and vibration for high-precision applications.
Optimized Load Capacity: The 15° contact angle design provides balanced performance for both radial and axial loads, with a dynamic load rating of 2565 lbf and static load rating of 2059 lbf.
71906 CD/HCP4ADBD Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision milling applications
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- High-Speed Motors: Spindle motors, dental handpieces, and small precision motors
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Semiconductor Manufacturing: Wafer handling robots and precision positioning stages
