71932 ACD/P4QBCA
71900 Series Super Precision Angular Contact Ball Bearings
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71932 ACD/P4QBCA Bearing Product Overview & Core Advantages
The 71932 ACD/P4QBCA is a precision quadruplex angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. This P4 tolerance class bearing features a back-to-back (QBC) matched arrangement of four bearings, enabling it to withstand combined radial and axial loads from multiple directions simultaneously. Its extra light preload (Class A) ensures minimal friction and precise rotational characteristics, making it ideal for high-speed, high-precision machinery where stability and high rigidity are paramount.
71932 ACD/P4QBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71932 | Basic bearing series and size designation (280mm bore, 380mm OD). |
| ACD | Angular Contact design with a 15° contact angle. |
| P4 | Indicates a high-precision tolerance class for superior running accuracy. |
| QBC | Denotes a Quadruplex Back-to-Back matched set arrangement. |
| A | Signifies Extra Light Preload for optimal performance in high-speed applications. |
71932 ACD/P4QBCA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The quadruplex back-to-back (QBC) arrangement creates an extremely rigid bearing system, capable of handling significant combined radial and axial loads. This configuration provides excellent moment load resistance, ensuring stable shaft positioning under complex loading conditions.
Precision Performance: Manufactured to P4 tolerance class standards, this bearing delivers exceptional running accuracy and minimal vibration. The 15° contact angle is optimized for applications requiring both radial and axial load capacity while maintaining high-speed capability.
High-Speed Capability: The phenolic cage material contributes to reduced friction and lower operating temperatures, supporting the bearing's limiting speed of 7,500 rpm. The extra light preload (Class A) further enhances high-speed performance by minimizing friction and heat generation.
Durability & Reliability: Constructed from chrome steel for both rings and balls, this bearing offers excellent wear resistance and fatigue life. With 29 balls of 19.05 mm diameter, it provides substantial load-carrying capacity while maintaining smooth operation.
71932 ACD/P4QBCA Bearing Typical Application Areas
The 71932 ACD/P4QBCA is specifically engineered for demanding industrial applications requiring high precision and exceptional rigidity, including:
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Gearboxes - Industrial transmission systems requiring accurate shaft alignment
- High-Speed Compressors - Rotary screw and centrifugal compressors
- Industrial Pumps - High-performance centrifugal and multistage pumps
- Specialized Machinery - Printing presses, textile machinery, and robotics
