71916 ACD/P4ADBA
71900 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 71916 ACD/P4ADBA is a precision angular contact ball bearing designed for applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) arrangement bearing set is preloaded to Extra Light (Class A) specifications, delivering superior system stiffness and minimal runout. Its primary advantage lies in its ability to handle combined loads—significant radial and axial loads in both directions—simultaneously, making it ideal for high-precision, high-rigidity machinery where positioning accuracy is critical.
71916 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71916 | Basic bearing series and size designation (80mm bore, 110mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates the bearing is part of a Duplex (paired) set. |
| DB | Specifies the Back-to-Back mounting arrangement. |
| P4A | Denotes a high-precision tolerance class (equivalent to ABEC 7). |
Structural Features and Performance Benefits
High Rigidity and Stability: The duplex back-to-back (DB) configuration creates a wide, rigid support system that effectively resists moment loads, ensuring exceptional operational stability and positioning accuracy.
Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 12,578 lbf, this bearing is engineered to handle demanding combined radial and axial loads from both directions simultaneously.
Precision and High-Speed Operation: The P4A tolerance class guarantees minimal dimensional variation for precise shaft guidance. The lightweight phenolic cage and optimized internal geometry contribute to smooth operation and a high limiting speed of 28,000 rpm.
Optimized Material Selection: Manufactured from chrome steel for both rings and balls, the bearing provides high strength, durability, and resistance to wear, ensuring a long service life in demanding conditions.
71916 ACD/P4ADBA Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for applications requiring maximum rigidity and accuracy, including:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Gearboxes: Especially in robotics and aerospace actuation systems.
- High-Frequency Motors and Spindles: Used in PCB drilling and semiconductor manufacturing equipment.
- Medical and Laboratory Equipment: Such as high-speed centrifuges and precision scanners.
