71910 CD/P4ADBB
71900 Series Super Precision Angular Contact Ball Bearings
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71910 CD/P4ADBB Bearing Product Overview & Core Advantages
The 71910 CD/P4ADBB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set is preloaded to Light / Class B specifications, ensuring minimal axial and radial play for superior system stability. Its primary advantage lies in its ability to handle combined loads—significant radial loads alongside high thrust loads in both directions—making it ideal for high-precision, high-rigidity applications where positioning accuracy is paramount. Manufactured to the stringent P4A tolerance class, it guarantees exceptional running accuracy and consistent performance.
71910 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71910 | Basic bearing designation, indicating a high-precision angular contact bearing series with a 50 mm bore, 72 mm OD, and 24 mm width. |
| C | Specifies a 15° contact angle, optimized for handling high thrust loads. |
| D | Indicates the bearing is part of a duplex (paired) set. |
| P4A | Denotes an ultra-high precision tolerance class, exceeding ABEC 7 standards, for exceptional running accuracy. |
| DBB | Specifies the matched arrangement as Duplex Back-to-Back. This configuration provides high moment rigidity and is optimal for withstanding overturning moments. |
71910 CD/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & System Stability: The duplex back-to-back (DBB) arrangement creates a preloaded system that significantly increases axial and radial rigidity. This setup is exceptionally resistant to moment loads, ensuring precise shaft positioning and minimizing deflection under combined loads.
Superior Load Capacity: With a 15° contact angle and a dynamic load rating of 4972 lbf, this bearing is engineered to efficiently support substantial radial loads and bidirectional axial loads simultaneously.
High-Speed Capability: The lightweight, durable phenolic resin cage ensures smooth operation and guides the balls effectively, contributing to the bearing's high limiting speed of 46,000 rpm. The open design allows for efficient lubrication management in high-speed applications.
Precision Engineering: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing delivers ultra-precise running performance, low vibration, and low noise levels.
71910 CD/P4ADBB Bearing Typical Application Areas
The 71910 CD/P4ADBB is specified for high-performance machinery where precision, speed, and rigidity are non-negotiable. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Robotics, aerospace actuation systems.
- High-Frequency Motors and Spindles: PCB drilling, dental handpieces.
- Medical and Laboratory Equipment: Centrifuges, precision scanners.
- Optical and Measuring Instrumentation: Coordinate measuring machines (CMM).
