71916 ACD/P4AQBCA
71900 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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Materials
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71916 ACD/P4AQBCA Bearing Product Overview & Core Advantages
The 71916 ACD/P4AQBCA is a precision angular contact ball bearing engineered for the most demanding applications. Its defining feature is its Quadruplex Back-to-Back (QBC) matched arrangement, which delivers exceptional system rigidity and stability under complex loading conditions. Manufactured to a P4A tolerance class, this bearing offers superior running accuracy, making it ideal for high-speed spindles and precision machinery where minimal runout and high positional accuracy are critical. The combination of a 25° contact angle and an extra light preload (Class A) ensures optimal performance for high-speed operation while effectively managing combined radial and axial loads.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71916 | Bearing series and size designation (80mm bore, 110mm OD, 64mm width). |
| ACD | Angular Contact design with a 25° contact angle. |
| P4A | Indicates a high-precision tolerance class for superior running accuracy and dimensional stability. |
| QBC | Signifies a Quadruplex Back-to-Back matched set of four bearings, providing maximum rigidity. |
71916 ACD/P4AQBCA Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The QBC arrangement creates a highly rigid bearing system capable of withstanding heavy combined loads and moments. This configuration is essential for applications requiring minimal deflection under load.
High-Speed Capability: The phenolic cage is lightweight and robust, contributing to lower centrifugal forces and smoother operation at the high limiting speed of 17,000 rpm. The 25° contact angle is optimized for high-speed performance.
Precision Engineering: The P4A tolerance class ensures tight dimensional control and exceptional running accuracy, which is critical for reducing vibration and noise in precision equipment.
Superior Material: Constructed from chrome steel for both rings and balls, this bearing offers high durability, wear resistance, and a long operational life under demanding conditions.
71916 ACD/P4AQBCA Bearing Typical Application Areas
The 71916 ACD/P4AQBCA is specifically designed for high-performance machinery where precision, speed, and rigidity are non-negotiable. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and rotary units requiring high stiffness and accuracy.
- High-Frequency Motors and Spindles: Applications demanding minimal runout at extreme rotational speeds.
- Aerospace and Defense Systems: Gyroscopes, radar equipment, and other precision instruments.
