71828 CD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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71828 CD/P4DGA Bearing Product Overview & Core Advantages
The 71828 CD/P4DGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. Manufactured to P4 tolerance class, it offers superior dimensional stability and running accuracy. Its extra light preload (Class A) minimizes deflection under operational loads, making it ideal for high-precision spindles and other critical machinery. The bearing's 15° contact angle is optimized to handle combined loads, efficiently supporting both radial and axial forces. As a Universal Matchable (SU) bearing, it can be paired with another identical bearing in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement to meet specific application stiffness and load requirements.
71828 CD/P4DGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71828 | Basic bearing series and size designation. |
| CD | Indicates a 15° contact angle and is designed for Universal Matchable (SU) pairing. |
| P4 | Denotes a high-precision tolerance class with extremely tight limits on bore, outside diameter, and width. |
| DGA | Signifies the bearing is lubricated and supplied as part of a universally matchable pair. |
71828 CD/P4DGA Bearing Structural Features & Performance Benefits
- High Precision & Rigidity: Manufactured to P4 tolerance class with an extra light preload, this bearing ensures minimal runout and high system rigidity, which is critical for maintaining accuracy in high-speed machining and instrumentation.
- Superior Load Capacity: The 15° contact angle and robust construction, featuring 35 high-grade chrome steel balls, provide excellent capacity for combined radial and axial loads.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, contributing to a high limiting speed of 11,000 rpm. This makes it suitable for demanding high-speed applications.
- Universal Matching Capability: The Universal Matchable (SU) design allows for flexible arrangement in sets of two, enabling precise control over preload and stiffness in the final application without selective mounting.
71828 CD/P4DGA Bearing Typical Application Areas
The 71828 CD/P4DGA is engineered for high-performance applications where precision and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices and laboratory equipment.
- High-Frequency Motors and Spindles: Applications requiring minimal vibration and high rotational accuracy.
- Aerospace and Defense Systems: Gyroscopes, navigation systems, and other critical components.
