71813 ACD/P4DGC
71800 Series Super Precision Angular Contact Ball Bearings
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71813 ACD/P4DGC Bearing Product Overview & Core Advantages
The 71813 ACD/P4DGC is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As part of the Universal Matchable (SU) series, this bearing is supplied in a pre-set pair, enabling it to support combined loads (radial and axial) simultaneously. Its P4 tolerance class ensures ultra-precise dimensions and runout, making it ideal for high-speed spindles and other precision machinery where minimal vibration and high positional accuracy are critical.
71813 ACD/P4DGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71813 | Basic bearing series and size designation (65mm bore, 85mm OD, 20mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a Moderate Preload (Class C) for optimized stiffness and minimal runout. |
| P4 | Indicates a high-precision tolerance class superior to ABEC-7 standards. |
| DGC | Specifies the bearing is Lubricated and part of a Universal Matchable (SU) pair. |
71813 ACD/P4DGC Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The angular contact design with a 25° contact angle and moderate preload provides high axial and radial rigidity, effectively handling combined loads from multiple directions. This ensures stable performance under demanding operational conditions.
High-Speed Performance: The lightweight and robust phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 36,000 rpm. This makes the bearing suitable for high-speed applications.
Precision Engineering: Manufactured to P4 tolerance class with tight dimensional control on the bore diameter, outside diameter, and width, this bearing guarantees exceptional running accuracy and low vibration levels.
Universal Matchability (SU): Supplied as one of a universally matchable pair, these bearings can be mounted in tandem, back-to-back, or face-to-face arrangements without the need for selective matching, simplifying installation and ensuring pre-defined performance.
71813 ACD/P4DGC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Rotary Tables: Indexing and positioning systems.
- High-Frequency Motors and Spindles: Applications requiring minimal runout at high rotational speeds.
- Medical and Laboratory Equipment: Centrifuges and precision instruments.
- Robotics: High-accuracy joints and arm assemblies.
