71810 ACD/P4DBC
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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Product Overview and Core Advantages
The 71810 ACD/P4DBC is a metric precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This duplex back-to-back (DB) arrangement bearing set delivers superior performance in handling combined loads, including significant radial and bidirectional axial loads. Manufactured to P4 tolerance class, it offers high running accuracy and is pre-lubricated for immediate use, making it an ideal choice for high-speed, high-rigidity spindle systems and precision machinery.
71810 ACD/P4DBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71810 | Basic bearing series and size designation (50mm bore, 65mm OD, 14mm width). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex Back-to-Back (DB) mounting arrangement. |
| P4 | High precision tolerance class for superior running accuracy. |
| DBC | Indicates a Moderate preload (Class C) applied to the matched set. |
Structural Features and Performance Benefits
High Rigidity and Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring exceptional operational stability under heavy combined loads.
Superior Load Capacity: With a 25° contact angle and a radial dynamic load rating of 2520 lbf, this bearing is engineered to handle significant radial and bidirectional axial loads simultaneously, making it suitable for complex loading conditions.
Optimized High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, contributing to a high limiting speed of 41,000 rpm. The moderate preload (Class C) ensures consistent performance and minimizes heat generation at high rotational speeds.
Precision and Reliability: Manufactured to P4 tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing guarantees high running accuracy, reduced vibration, and extended service life in precision applications.
71810 ACD/P4DBC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes requiring high rigidity and precision.
- Precision Rotary Systems: Industrial robots, indexing tables, and high-precision rotary actuators.
- High-Speed Drives: Electric motor spindles, turbochargers, and compressor shafts.
- Medical and Laboratory Equipment: Centrifuges and other instruments demanding quiet operation and high accuracy.
