What does the outer nut do in relation to the spindle?

The outer nut plays a crucial role in adjusting the position of the spindle in relation to the band. Specifically, it allows for the tightening or loosening of the spindle, which is essential for proper placement and function of the band. When the outer nut is turned, it directly affects how snugly the spindle holds onto the band, ensuring that the band is securely positioned or released as needed. This action is critical in various dental procedures where precise adjustments are necessary for optimal performance and patient comfort. Understanding the function of the outer nut and spindle is important for an EFDA as it contributes to effective dental treatment and equipment handling.