S71910 ACD/P4AQBCA
Sealed Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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S71910 ACD/P4AQBCA Bearing Product Overview & Core Advantages
The S71910 ACD/P4AQBCA is a super-precision angular contact ball bearing designed for the most demanding applications. This quadruplex matched set, arranged in a back-to-back (QBC) configuration, delivers exceptional system rigidity and rotational accuracy. Operating under a standardized extra light preload (Class A), it is engineered to handle combined radial and axial loads simultaneously, making it an ideal solution for high-speed spindles and other precision machinery requiring maximum performance and reliability.
S71910 ACD/P4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S7 | Super-Precision Bearing Series | Indicates a premium series designed for ultra-high precision and speed. |
| 1910 | Bore Size 50mm, OD 72mm, Width 48mm | Defines the critical bearing dimensions. |
| ACD | 25° Contact Angle | Optimized for high axial load capacity and high-speed operation. |
| P4A | High Precision Tolerance Class | Exceeds standard ABEC 7/ISO P4 tolerances for superior running accuracy. |
| QBC | Quadruplex Back-to-Back | Four bearings supplied as a factory-matched set in a back-to-back arrangement for maximum stiffness and moment load resistance. |
S71910 ACD/P4AQBCA Bearing Structural Features & Performance Benefits
Unmatched Rigidity and Load Capacity: The quadruplex back-to-back (QBC) arrangement creates an extremely rigid bearing system capable of withstanding heavy combined loads and significant moment loads, which is critical for maintaining machining accuracy.
High-Speed Performance: The phenolic resin cage ensures low friction, excellent acceleration characteristics, and stable operation at the high limiting speed of 34,000 rpm. The 25° contact angle is optimally balanced for speed and axial load capacity.
Super-Precision Operation: Manufactured to P4A tolerance class with extremely tight dimensional runouts, this bearing guarantees minimal vibration and exceptional rotational accuracy for finish quality.
Sealed and Lubricated for Life: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is ready for immediate installation, offering long-term, maintenance-free operation within its specified temperature range.
S71910 ACD/P4AQBCA Bearing Typical Application Areas
The S71910 ACD/P4AQBCA is the bearing of choice for high-performance applications where precision, speed, and rigidity are non-negotiable. Key industries and machinery include:
- High-Frequency CNC Machining Spindles
- Precision Grinding Spindles
- High-speed Robotic Drives and Servo Motors
- Advanced Aerospace and Defense Systems
- Medical and Dental Equipment Spindles
