71830 ACDGA/P4
71800 Series Super Precision Angular Contact Ball Bearings
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71830 ACDGA/P4 Bearing Product Overview & Core Advantages
The 71830 ACDGA/P4 is a single row angular contact ball bearing designed for high-precision applications requiring exceptional rotational accuracy and rigidity. Engineered to a P4 tolerance class, it guarantees minimal runout and superior performance. Its key advantage lies in its ability to accommodate combined loads—significant radial loads and axial loads in one direction simultaneously. The 25° contact angle and Universal Matchable (SU) designation mean it can be paired with a second, identical bearing to form a rigid, preloaded set capable of handling bidirectional axial loads, making it ideal for high-speed and high-reliability spindles and systems.
Model Code In-Depth Analysis
| Code Segment | Technical Meaning |
|---|---|
| 71830 | Basic bearing designation, defining the bearing dimensions (150mm bore, 190mm OD, 20mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| DGA | Indicates a Universal Matchable (SU) bearing. Two such bearings can be mounted together in a "back-to-back" (DB) or "face-to-face" (DF) arrangement to handle bidirectional thrust loads. |
| /P4 | Specifies the tolerance class to ABEC 7 / ISO P4 standards, ensuring extremely tight dimensional and running accuracy for precision applications. |
71830 ACDGA/P4 Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The single row angular contact design, combined with a 25° contact angle, provides excellent resistance to combined radial and axial loads. When used in a Universal Matchable (SU) pair, the system achieves very high rigidity, critical for minimizing deflection in machine tool spindles.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the optimized internal geometry and high-grade chrome steel construction contribute to a high limiting speed of 11,000 rpm, making it a true high-speed bearing.
- Precision Engineering: Manufactured to P4 tolerance class, this bearing ensures minimal vibration and precise running accuracy. The tight dimensional tolerances on the bore, outside diameter, and width guarantee a perfect fit and predictable performance.
- Optimized Internal Geometry: With 35 high-precision balls of 11.112 mm diameter, the bearing provides a large load-carrying capacity and smooth, quiet operation.
71830 ACDGA/P4 Bearing Typical Application Areas
The 71830 ACDGA/P4 is engineered for demanding applications where precision, speed, and rigidity are paramount. Its primary uses include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: For PCB drilling, precision grinding, and other high-accuracy machining operations.
- High-Frequency Motors: Spindles for electric motors requiring high rotational speeds.
- Robotics: High-accuracy joints and rotary axes.
