71930 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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71930 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 71930 CDGA/HCP4A is a high-precision angular contact ball bearing designed for applications demanding exceptional accuracy and performance. Engineered with ceramic balls and manufactured to P4A super precision tolerance, this bearing delivers superior rotational accuracy, reduced friction, and extended service life. Its 15° contact angle and extra light preload (Class A) make it ideal for high-speed operation while maintaining excellent rigidity. The bearing comes pre-lubricated and is part of a universally matchable set, enabling flexible mounting configurations in precision assemblies.
71930 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71930 | Basic bearing designation indicating size series and bore diameter (150mm) |
| C | 15° contact angle design |
| D | High precision tolerance class designation |
| GA | Extra light preload (Class A) |
| HC | Hybrid ceramic balls |
| P4A | Super precision tolerance class (exceeding ABEC 7) |
71930 CDGA/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings with silicon nitride ceramic balls significantly reduces friction, heat generation, and wear, while providing excellent electrical insulation properties and extended service life under demanding conditions.
Precision Engineering: Manufactured to P4A super precision standards with tight dimensional tolerances (bore: -0.004mm to 0, OD: -0.004mm to 0), ensuring minimal runout and vibration for superior rotational accuracy in high-speed applications.
High-Speed Capability: The phenolic resin cage and ceramic balls enable operation at limiting speeds up to 11,000 rpm, while the 15° contact angle and extra light preload optimize performance for high-speed spindle applications.
Enhanced Load Capacity: With a dynamic load rating of 25,650 lbf and static load rating of 29,700 lbf, this bearing provides reliable performance under combined radial and axial loads.
71930 CDGA/HCP4A 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
- Semiconductor Manufacturing: Wafer handling robots, precision positioning stages
- Aerospace Systems: Gyroscopes, navigation instruments, and auxiliary power units
- Medical Equipment: High-speed dental handpieces, surgical robots, and imaging systems
