S71913 ACD/P4AQBCA
Sealed Super Precision Angular Contact Ball Bearings
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S71913 ACD/P4AQBCA Bearing Product Overview & Core Advantages
The S71913 ACD/P4AQBCA is a precision quadruplex matched set of double row angular contact ball bearings designed for the most demanding applications. This metric system bearing is characterized by its extra light preload (Class A) and P4A super-precision tolerance class, ensuring exceptional running accuracy and minimal vibration. Its core advantage lies in the back-to-back (QBC) arrangement of four bearings, which provides superior rigidity and the ability to withstand combined radial and axial loads from both directions, making it ideal for high-speed, high-precision spindles.
S71913 ACD/P4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a high-precision bearing series. |
| 1913 | Specifies the bearing size: 65mm bore, 90mm OD, 52mm width. |
| ACD | Angular Contact design with a 25° contact angle. |
| P4A | Denotes a super-precision tolerance class for exceptional dimensional and running accuracy. |
| QBC | Signifies a Quadruplex Back-to-Back matched set of four bearings. |
S71913 ACD/P4AQBCA Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The double row angular contact design and the quadruplex back-to-back (QBC) arrangement create an extremely rigid bearing system. This configuration effectively resists moment loads and can handle significant combined radial and axial loads in both directions, providing stable and precise shaft positioning.
High-Speed Performance: The lightweight phenolic resin cage is engineered for high-speed operation, reducing centrifugal forces and friction. This, combined with the optimized internal geometry, allows for a high limiting speed of 31,000 rpm, making it suitable for high-speed spindle applications.
Sealed and Pre-Lubricated for Longevity: As a sealed bearing, it is protected from contaminants. The bearing is pre-lubricated with grease, offering a wide operating temperature range from -30°C to 110°C, ensuring reliable performance and reducing maintenance requirements.
S71913 ACD/P4AQBCA Bearing Typical Application Areas
The S71913 ACD/P4AQBCA is engineered for high-performance machinery requiring utmost precision and speed. Its primary applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: For PCB drilling, semiconductor manufacturing, and other high-accuracy processes.
- High-Frequency Motors: Where minimal runout and high rigidity are critical.
- Advanced Robotics: In high-precision rotary joints and arms.
