S71920 ACD/P4AQGA
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S71920 ACD/P4AQGA Bearing Product Overview & Core Advantages
The S71920 ACD/P4AQGA is a high-precision, sealed, double row angular contact ball bearing engineered for demanding applications. Its core advantage lies in its ability to simultaneously support combined loads (radial and bidirectional axial loads) with high rigidity and exceptional running accuracy. The Extra light preload (Class A) and P4A tolerance class ensure smooth, precise operation, making it ideal for high-speed spindles and other precision machinery where reliability and minimal deflection are critical. Its compact design integrates the functionality of two single-row bearings in a single, robust unit.
S71920 ACD/P4AQGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71920 | Denotes the bearing series and size (100mm bore, 140mm OD, 80mm width). |
| ACD | Signifies a 25° contact angle and a double row design optimized for high axial rigidity. |
| P4A | Indicates an ultra-high precision tolerance class, superior to ABEC 7, ensuring minimal runout and vibration. |
| QGA | Specifies the Universal Matchable (SU) arrangement and that the bearing is part of a pre-set matched set of 4 bearings for simplified installation and optimal preload. |
S71920 ACD/P4AQGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row angular contact design provides superior rigidity, enabling the bearing to handle significant combined radial and axial loads from both directions without sacrificing performance.
High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the 25° contact angle and factory-applied grease lubrication contribute to a high limiting speed of 16,250 rpm.
Precision & Longevity: Manufactured to P4A tolerance with chrome steel rings and balls, this bearing guarantees exceptional running accuracy and extended service life. The integral seals protect against contamination, and the pre-greasing ensures immediate, reliable operation within a temperature range of -30°C to 110°C.
S71920 ACD/P4AQGA Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles (CNC milling, grinding, and turning centers)
- High-Frequency Motors and High-Speed Spindles
- Precision Robotics and Automation Equipment
- Medical Equipment (e.g., high-speed dental handpieces, centrifuges)
- Aerospace Actuation Systems and Instrumentation
