71906 CDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71906 CDGB/P4A Bearing Product Overview & Core Advantages
The 71906 CDGB/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single bearing from a universally matchable (SU) set, it enables precise axial preload adjustment when paired with a second, identical bearing. Its key advantages include a P4A tolerance class for superior running accuracy, a light preload (Class B) for optimal rigidity in high-speed spindles, and a 15° contact angle that provides excellent performance under combined radial and axial loads. The phenolic cage and factory-applied lubrication ensure reliable operation at limiting speeds up to 100,500 rpm.
71906 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71906 | Basic bearing designation indicating a super-precision angular contact ball bearing with 30mm bore, 47mm OD, and 9mm width. |
| C | 15° contact angle design, optimized for high-speed applications with moderate axial load capacity. |
| D | Light preload (Class B), providing optimal rigidity for high-speed spindle applications. |
| GB | Universal matching designation, allowing any two bearings with this suffix to be paired without selective matching. |
| P4A | Super-precision tolerance class exceeding ABEC 7 standards, ensuring exceptional running accuracy and minimal vibration. |
71906 CDGB/P4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The phenolic resin cage provides excellent strength-to-weight ratio and reduced friction at high rotational speeds, contributing to the impressive limiting speed of 100,500 rpm. This makes the bearing ideal for demanding high-speed applications.
Precision Engineering: Manufactured to P4A tolerance class, this bearing features extremely tight dimensional tolerances on bore, outside diameter, and width. The precision-ground raceways and 20 high-grade chrome steel balls ensure smooth, quiet operation with minimal runout.
Optimized Load Capacity: With a 15° contact angle, the 71906 CDGB/P4A efficiently handles combined radial and axial loads. The radial dynamic load rating of 1609 lbf and static load rating of 1024 lbf provide reliable performance in precision applications.
Thermal Stability: The phenolic cage material and factory lubrication enable stable operation across the specified temperature range of -30°C to 110°C, maintaining precision under varying thermal conditions.
71906 CDGB/P4A Bearing Typical Application Areas
The 71906 CDGB/P4A is specifically engineered for high-precision, high-speed applications including:
- Machine Tool Spindles: High-speed milling, grinding, and turning spindles requiring exceptional running accuracy
- Precision Instrumentation: Measuring equipment, optical instruments, and laboratory apparatus
- High-Speed Motors: Spindle motors, high-frequency motors, and precision servo systems
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Medical Equipment: Dental handpieces, laboratory centrifuges, and imaging systems
