71816 ACD/P2DBC
71800 Series Super Precision Angular Contact Ball Bearings
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71816 ACD/P2DBC Bearing Product Overview & Core Advantages
The 71816 ACD/P2DBC is a precision metric angular contact ball bearing designed for demanding applications requiring high rigidity and exceptional running accuracy. This bearing features a duplex back-to-back (DB) arrangement with a moderate preload (Class C), making it ideal for supporting combined loads—simultaneously handling significant radial and axial forces. Manufactured to P2 tolerance class, it ensures superior dimensional and running accuracy for high-performance machinery. Its compact design, with a 20mm width, allows for space-saving installations without compromising on load capacity or performance.
71816 ACD/P2DBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71816 | Basic bearing designation indicating a metric, angular contact type with an 80mm bore, 100mm OD, and 20mm width. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (Two bearings supplied as a set). |
| P2 | High precision tolerance class, offering extremely tight dimensional and running accuracy. |
| DB | Back-to-Back arrangement of the duplex set. This configuration provides high moment rigidity. |
| C | Moderate preload level. Preload eliminates internal clearance for greater stiffness and precise shaft positioning. |
71816 ACD/P2DBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide effective spread of the load-carrying balls, significantly increasing the bearing's resistance to moment loads and enhancing overall system stiffness.
- Superior Load Capacity: With a 25° contact angle and a high ball count (35 balls), this bearing is engineered to handle substantial combined radial and axial loads simultaneously. The dynamic load rating of 4972 lbf and static load rating of 7762 lbf confirm its robust performance.
- Precision & High-Speed Operation: Manufactured to P2 tolerance class with a phenolic cage, the bearing ensures smooth operation, reduced vibration, and is capable of achieving a limiting speed of 28,000 rpm. The phenolic cage offers low weight and excellent performance at high speeds.
- Optimized Material & Lubrication: Both rings and balls are made from high-grade chrome steel for durability and long service life. The bearing comes pre-lubricated, ready for immediate installation and operation within a temperature range of -30°C to 110°C.
71816 ACD/P2DBC Bearing Typical Application Areas
The 71816 ACD/P2DBC is ideally suited for high-precision applications where rigidity, accuracy, and speed are critical. Key industries and equipment include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Gearboxes: Supporting shafts in high-performance automotive and industrial transmissions.
- High-Frequency Spindles: Used in PCB drilling and routing machines.
- Robotic Arms and Actuators: Providing precise and rigid rotational support in joints.
- Medical and Laboratory Equipment: In centrifuges and other high-speed precision instruments.
