71916 ACD/P4AQBCC
71900 Series Super Precision Angular Contact Ball Bearings
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71916 ACD/P4AQBCC Bearing Product Overview & Core Advantages
The 71916 ACD/P4AQBCC is a precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This metric bearing features a moderate preload (Class C) and is supplied as a matched set of four bearings in a back-to-back (QBC) arrangement. Its primary advantage lies in its ability to handle combined loads—significant radial and thrust loads from both directions—simultaneously, making it ideal for high-precision, high-rigidity systems. The P4A tolerance class ensures superior running accuracy for smooth, reliable operation.
71916 ACD/P4AQBCC 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 | Signifies a moderate preload (Class C) for optimized stiffness. |
| /P4A | Indicates a high-precision tolerance class (P4A) for superior running accuracy. |
| QBCC | Denotes a Quadruplex Back-to-Back (QBC) matched set of four bearings. |
71916 ACD/P4AQBCC Bearing Structural Features & Performance Benefits
Unmatched Rigidity: The quadruplex back-to-back (QBC) arrangement creates an extremely rigid bearing system, capable of resisting complex moment loads and shaft deflection, which is critical for maintaining precision under heavy combined loads.
Superior Load Capacity: With a 25° contact angle and a dynamic load rating of 20,340 lbf, this bearing is engineered to sustain high radial and bidirectional axial loads simultaneously.
High-Speed Capability: The phenolic cage is lightweight and robust, contributing to stable operation at the limiting speed of 17,000 rpm. The bearing is pre-lubricated for immediate operation.
Precision Engineering: Manufactured to P4A tolerance standards with tight dimensional controls on bore, outside diameter, and width, ensuring minimal runout and vibration for smooth, accurate performance.
71916 ACD/P4AQBCC Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is ideally suited for:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers requiring extreme accuracy and stiffness.
- Precision Gearboxes and Transmission Systems: Where precise shaft positioning and load capacity are paramount.
- Industrial Robots and Automation Equipment: In robotic arm joints and precision actuators.
- High-Frequency Motors and Spindles: Applications demanding high rotational speeds and operational stability.
