71916 CD/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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71916 CD/P4ADBB Bearing Product Overview & Core Advantages
The 71916 CD/P4ADBB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set is preloaded to Light / Class B standards, ensuring high system stiffness and minimal axial and radial runout. Its primary advantage lies in its ability to handle combined loads—simultaneously supporting significant radial loads and axial loads in both directions. Manufactured to the stringent P4A tolerance class, this bearing is the ideal choice for high-precision, high-reliability machinery where operational stability is paramount.
71916 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71916 | Basic bearing series and size designation | Indicates a high-precision angular contact bearing with 80mm bore, 110mm OD, and 32mm width. |
| C | 15° Contact Angle | Optimized for high-speed operation and balanced axial/radial load capacity. |
| D | Duplex Back-to-Back (DB) Arrangement | Provides high moment rigidity and can accommodate axial loads from both directions. |
| P4A | High Precision Tolerance Class | Exceeds standard ABEC 7/ISO P4 tolerances, ensuring ultra-precise running accuracy. |
| DBB | Light Preload (Class B) | Pre-matched and preloaded by the manufacturer for immediate high-rigidity performance. |
71916 CD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement of two bearings creates a rigid, moment-resisting system. This configuration enables the bearing set to handle combined radial and bidirectional axial loads effectively, with a high dynamic load rating of 13,320 lbf and static load rating of 17,550 lbf.
Optimized High-Speed Performance: The 15° contact angle and lightweight phenolic resin cage are engineered for stable operation at high rotational speeds, with a limiting speed of 28,000 rpm. The open design allows for efficient lubrication management, critical for high-speed bearing applications.
Precision & Stability: Manufactured from high-grade chrome steel for both rings and balls, and held to the ultra-precise P4A tolerance class, this bearing guarantees minimal runout and vibration, which is essential for maintaining machining and positioning accuracy.
71916 CD/P4ADBB Bearing Typical Application Areas
The 71916 CD/P4ADBB is engineered for high-performance applications where precision and rigidity are non-negotiable. Its primary uses include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Gearboxes: In robotics, aerospace, and high-end automotive systems.
- High-Frequency Motors and Spindles: Where low vibration and high running accuracy are required.
- Medical and Laboratory Equipment: Such as centrifuges and precision scanners.
- Optical and Measuring Instrumentation: Demanding the highest levels of rotational precision.
