71912 ACE/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
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71912 ACE/P4ADGA Bearing Product Overview & Core Advantages
The 71912 ACE/P4ADGA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As part of the P4A tolerance class, it offers extremely tight dimensional and running accuracy. Its 25° contact angle and universal matchable (SU) design make it ideal for combination loads, efficiently handling both radial and axial loads in either direction when mounted in pairs. The phenolic cage and optimized internal geometry contribute to its high-speed capability, low heat generation, and smooth operation, making it a cornerstone for high-reliability machinery.
71912 ACE/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71912 | Basic bearing series and size designation (60mm bore, 85mm OD, 26mm width). |
| ACE | Indicates a 25° contact angle and specific internal design optimizations for high-speed operation. |
| P4A | Denotes a super-precision tolerance class, exceeding ABEC 7/ISO P4 standards, ensuring minimal runout and vibration. |
| DGA | Specifies a universal matchable (SU) arrangement. Two bearings can be paired in any combination (DB, DF, DT) without loss of preload. |
71912 ACE/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and robust construction provide high rigidity, enabling it to withstand significant combination loads. With a dynamic load rating of 5648 lbf and a static load rating of 4950 lbf, it offers reliable performance under demanding conditions.
- Superior High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the optimized internal geometry and 25° contact angle work in concert to achieve a high limiting speed of 36,000 rpm.
- Precision & Stability: Manufactured to P4A tolerance class with extremely tight bore, OD, and width tolerances, this bearing ensures exceptional running accuracy, minimal vibration, and consistent performance in precision spindles.
- Universal Matching: The Universal Matchable (SU) feature allows for simplified bearing arrangement design and assembly, as any two bearings can be paired without selective matching, saving time and cost.
71912 ACE/P4ADGA Bearing Typical Application Areas
This super-precision angular contact ball bearing is engineered for the most demanding high-speed and high-precision applications, including:
- Machine Tool Spindles: CNC machining centers, grinding spindles, and milling spindles.
- High-Frequency Motors: Spindles for PCB drilling and high-speed routers.
- Precision Instrumentation: Rotary encoders, measuring devices, and scientific equipment.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical rotating assemblies.
