71930 CDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71930 CDGB/P4A Bearing Product Overview & Core Advantages
The 71930 CDGB/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior running accuracy. Designed to accommodate primarily radial loads combined with axial loads in one direction, this bearing features a 15° contact angle and light preload (Class B) for optimal rigidity and minimal deflection under operational stresses. Manufactured to P4A tolerance class, it ensures exceptional dimensional stability and rotational precision, making it ideal for high-speed spindles and precision machinery where uncompromising accuracy is required.
71930 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71930 | Basic bearing designation indicating specific dimensions (150mm bore, 210mm OD, 28mm width) |
| C | 15° contact angle design |
| D | Light preload (Class B) |
| GB | Universal matching bearing - can be mounted in any combination |
| P4A | High precision tolerance class exceeding ABEC 7 standards |
71930 CDGB/P4A Bearing Structural Features & Performance Benefits
Precision Engineering: The P4A tolerance class ensures minimal runout and vibration, critical for applications requiring extreme rotational accuracy. The phenolic resin cage provides excellent dimensional stability and reduced friction at high speeds.
Optimized Load Capacity: With a radial dynamic load rating of 25,650 lbf and radial static load rating of 29,700 lbf, this bearing delivers reliable performance under combined radial and axial loads. The 15° contact angle provides optimal load distribution.
High-Speed Capability: The phenolic cage and precision-ground chrome steel components enable operation at limiting speeds up to 11,000 rpm, making it suitable for demanding spindle applications.
Universal Matching Design: As a universal matchable bearing, multiple units can be arranged in sets of up to 4 bearings with predictable preload characteristics, simplifying installation and maintenance.
71930 CDGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles - High-precision milling, grinding, and turning centers
- Precision Instrumentation - Measuring equipment and laboratory instruments
- High-Speed Motors - Industrial motors and servo drives requiring minimal vibration
- Aerospace Components - Guidance systems and precision actuators
- Medical Equipment - Dental handpieces and surgical tools
