71816 ACD/P4DBA
71800 Series Super Precision Angular Contact Ball Bearings
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71816 ACD/P4DBA Bearing Product Overview & Core Advantages
The 71816 ACD/P4DBA is a metric double row angular contact ball bearing designed for exceptional precision and reliability in demanding applications. This precision bearing features a duplex back-to-back (DB) matched arrangement, providing superior high rigidity and the ability to withstand combined loads (radial and axial loads) simultaneously. Manufactured to a P4 tolerance class and preloaded to an extra-light (Class A) specification, it is engineered for high-speed operation and exceptional rotational accuracy, making it ideal for high-precision machinery.
71816 ACD/P4DBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71816 | Basic bearing series and bearing dimensions (80mm bore, 100mm OD, 20mm width) | Defines the core geometry and size of the bearing. |
| AC | Angular Contact design with a 25° contact angle | Optimized for carrying significant axial loads in addition to radial loads. |
| D | Duplex Back-to-Back (DB) arrangement | Provides high rigidity and can accommodate moment loads. |
| P4 | Tolerance class P4 | Indicates very high dimensional and running accuracy, superior to standard ABEC-7. |
| DBA | Specific preload designation (Extra light / Class A) | Ensures minimal bearing deflection and smooth, precise operation at high speeds. |
71816 ACD/P4DBA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement of two bearings creates a rigid bearing system that effectively resists moment loads and tilting. This configuration, combined with the 25° contact angle, provides excellent capability for handling combined radial and axial loads.
High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces and ensures stable operation, contributing to the high limiting speed of 28,000 rpm. The extra-light preload (Class A) further enhances high-speed suitability by reducing friction and heat generation.
Precision & Accuracy: Manufactured to a P4 tolerance class with tight dimensional control on the bore, outside diameter, and width, this bearing guarantees exceptional running accuracy and minimal vibration, which is critical for precision applications.
Material & Construction: The rings and balls are made from high-grade chrome steel, offering high hardness and durability for a long service life under demanding conditions.
71816 ACD/P4DBA Bearing Typical Application Areas
This high-precision, high-rigidity bearing is ideally suited for applications requiring superior accuracy and speed. Common uses include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Gearboxes: Where high rigidity and low runout are paramount.
- High-Frequency Motors and Spindles: Demanding high rotational speeds and accuracy.
- Industrial Pumps and Compressors: For handling significant axial and radial loads.
- Robotics and Automation Equipment: In joints and drives requiring precise motion control.
