71816 ACD/P4QGB
71800 Series Super Precision Angular Contact Ball Bearings
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71816 ACD/P4QGB Bearing Product Overview & Core Advantages
The 71816 ACD/P4QGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high rigidity. Manufactured to P4 tolerance class, this bearing excels in high-speed operations with a limiting speed of 28,000 rpm. Its 25° contact angle and Universal Matchable (SU) design enable it to handle significant combined loads (radial and axial) simultaneously. The bearing comes pre-lubricated and is part of a matched set of 4, ensuring optimal performance and simplified installation in high-precision spindle assemblies and other critical machinery.
71816 ACD/P4QGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71816 | Basic bearing designation, indicating a metric series angular contact ball bearing with an 80mm bore, 100mm OD, and 40mm width. |
| ACD | Contact angle of 25° and a Universal Matchable (SU) design. Bearings with this suffix can be universally paired in any combination to form duplex sets. |
| P4 | Indicates a high-precision tolerance class, superior to ABEC-7, ensuring extremely tight dimensional and running accuracy for demanding applications. |
| QGB | Specifies a Light preload (Class B) and that the bearing is supplied as part of a matched set. This ensures consistent preload and performance when mounted with other bearings from the same set. |
71816 ACD/P4QGB Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design and 25° contact angle provide high rigidity, enabling the bearing to support substantial combined radial and axial loads. The phenolic cage and optimized internal geometry contribute to stable operation under load.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the P4 precision and optimized internal geometry allow for a high limiting speed of 28,000 rpm, making it an ideal high-speed bearing.
- Precision and Stability: Manufactured to P4 tolerance class with extremely tight bore, OD, and width tolerances, this bearing guarantees minimal runout and vibration, which is critical for applications like machine tool spindles.
- Matched Set Simplicity: Supplied as a Universal Matchable (SU) bearing in a matched set of 4, it simplifies the assembly of preloaded duplex or triplex arrangements, ensuring consistent performance and reducing installation time and complexity.
71816 ACD/P4QGB Bearing Typical Application Areas
The 71816 ACD/P4QGB is engineered for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: High-accuracy measuring and testing equipment.
- High-Frequency Motors and Spindles: Applications requiring minimal vibration and high rotational accuracy.
- Robotics and Automation: High-precision robotic arms and rotary joints.
