71900 CDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71900 CDGA/P4A Bearing Product Overview & Core Advantages
The 71900 CDGA/P4A is a single-row angular contact ball bearing designed for applications demanding the highest levels of precision and speed. Manufactured to the stringent P4A tolerance class, this bearing is engineered to handle primarily axial loads in one direction and combined loads with high accuracy. Its extra light preload (Class A) minimizes friction and heat generation, making it ideal for high-speed spindles and other precision machinery where rotational accuracy is paramount. The bearing is universally matchable (SU), allowing for precise axial clearance control when mounted in pairs.
71900 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| 71900 | The basic bearing series number, indicating a 10 mm bore diameter, 22 mm outside diameter, and 6 mm width. |
| C | Designates a 15° contact angle, optimized for high-speed operation and moderate axial load capacity. |
| DG | Indicates the bearing is universally matchable (SU). Two bearings can be paired in a duplex set to support axial loads in both directions or to apply a specific preload. |
| A | Specifies an extra light preload (Class A), which reduces running torque and heat for superior high-speed performance. |
| P4A | The tolerance class, signifying extremely high precision levels for dimensional and running accuracy, exceeding ABEC 7 standards. |
71900 CDGA/P4A Bearing Structural Features & Performance Benefits
High-Speed Capability: The combination of a phenolic resin cage, a 15° contact angle, and extra light preload enables a very high limiting speed of 165,000 rpm. The phenolic cage is lightweight and exhibits excellent performance under high centrifugal forces.
Superior Precision and Rigidity: Manufactured to P4A precision class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing ensures minimal runout and vibration. This results in high rotational accuracy and system rigidity.
Optimized Load Capacity: As an angular contact ball bearing, it is designed to support significant axial loads in one direction as well as combined (radial and axial) loads. The high-grade chrome steel construction for both rings and balls ensures durability and a high dynamic load rating.
Universal Matching Design: The SU universal matching feature allows for flexible mounting configurations. When two bearings are mounted together, they can be arranged in tandem, back-to-back, or face-to-face orientations to meet specific application requirements for stiffness and load capacity.
71900 CDGA/P4A Bearing Typical Application Areas
The 71900 CDGA/P4A is ideally suited for high-performance applications requiring exceptional speed and precision, including:
- High-Frequency Spindles for PCB drilling and precision machining
- Precision Grinding Spindles
- High-Speed Machine Tool Axles
- Turbochargers and other high-speed instrumentation
- High-performance electric motors
