71816 ACD/P4DGC
71800 Series Super Precision Angular Contact Ball Bearings
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71816 ACD/P4DGC Bearing Product Overview & Core Advantages
The 71816 ACD/P4DGC is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. As a universal matchable (SU) bearing supplied in a pre-set pair, it delivers superior performance in handling combined loads—simultaneously supporting significant radial and axial loads. Its P4 tolerance class ensures ultra-precise running accuracy, making it ideal for high-speed spindles and other critical machinery where minimal runout and vibration are paramount. The moderate preload (Class C) enhances system stiffness right from installation, reducing deflection under operational stresses.
71816 ACD/P4DGC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71816 | Basic bearing series and size designation (80mm bore, 100mm OD, 20mm width). |
| AC | Angular Contact design with a 25° contact angle, optimized for combined loads. |
| D | Signifies two bearings supplied as a universally matchable (SU) set. |
| P4 | Indicates a high-precision tolerance class for superior running accuracy. |
| DGC | Specifies the moderate preload (Class C) applied to the bearing pair. |
71816 ACD/P4DGC Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double bearing arrangement (Universal Matchable SU) creates a highly rigid support system. The 25° contact angle is engineered to efficiently handle substantial combined radial and axial loads. The applied moderate preload eliminates internal clearance, maximizing system stiffness and rotational accuracy from the moment of startup.
High-Speed Performance: The lightweight, durable phenolic resin cage minimizes centrifugal forces, reduces friction, and contributes to the high limiting speed of 28,000 rpm. This makes the bearing exceptionally suited for high-speed applications.
Precision Engineering: Manufactured to P4 tolerance standards with tight dimensional controls on the bore diameter, outside diameter, and width, this bearing ensures minimal vibration and precise shaft positioning.
Material & Lubrication: Constructed from high-grade chrome steel for both rings and balls, providing excellent wear resistance and durability. The bearing is pre-lubricated for immediate operation within a wide temperature range of -30°C to 110°C.
71816 ACD/P4DGC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring utmost precision and rigidity.
- Precision Robotics: Arm joints and rotary actuators where accuracy and responsiveness are critical.
- High-Frequency Motors & Spindles: Applications demanding smooth operation at extreme rotational speeds.
- Medical & Laboratory Equipment: Centrifuges, scanners, and other devices needing reliable, high-precision rotation.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and other critical motion control assemblies.
