71904 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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71904 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The 71904 CD/HCP4ADGA is a precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This universal matchable bearing features a 15° contact angle and P4A tolerance class for superior running accuracy. Its ceramic ball construction and phenolic cage enable outstanding high-speed capabilities up to 75,000 rpm, while the extra light preload (Class A) ensures minimal friction and optimal positioning accuracy in precision machinery.
71904 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| CD | 15° contact angle, universal matchable design | Optimized for combined loads and flexible mounting arrangements |
| HC | Hybrid ceramic balls | Reduced weight, lower friction, and enhanced high-speed performance |
| P4A | ABEC 7 / ISO P4A tolerance class | Exceptional dimensional and running accuracy for precision applications |
| DGA | Extra light preload (Class A) | Minimal friction, high rotational accuracy, and optimal stiffness |
71904 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride ceramic balls provides superior performance characteristics including reduced centrifugal forces, lower operating temperatures, and extended service life in high-speed applications.
Phenolic Cage Design: The phenolic resin cage offers excellent dimensional stability and low friction operation, contributing to the bearing's exceptional limiting speed of 75,000 rpm while maintaining quiet operation.
Precision Engineering: With P4A tolerance class and tight dimensional controls (bore diameter tolerance: -0.004mm to 0), this bearing ensures precise shaft positioning and minimal runout for applications demanding high rotational accuracy.
Universal Matchability: The SU universal match designation allows for flexible mounting arrangements in pairs without requiring selective matching, simplifying installation and maintenance procedures.
71904 CD/HCP4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers and grinding spindles requiring exceptional accuracy and speed
- High-Speed Motors: Electric motors and spindles operating at elevated speeds where ceramic hybrid technology provides advantages
- Precision Instrumentation: Medical equipment, measuring devices, and optical systems demanding minimal vibration and high positional accuracy
- Aerospace Components: Guidance systems, actuators, and auxiliary power units where reliability and performance are critical
- Semiconductor Manufacturing: Wafer handling equipment and precision positioning stages requiring clean operation and high accuracy
