What is the common name for the circular relationship that should exist between aligned shafts?

The common name for the circular relationship that should exist between aligned shafts is referred to as the "golden rule" of alignment. This principle highlights that when shafts are properly aligned, they should share a geometric relationship that ensures that their axes are collinear. This ideal condition minimizes wear and tear, enhances efficiency, and prolongs the lifespan of the machinery by reducing vibration and misalignment stresses.

The term "golden rule" signifies the fundamental nature of this alignment principle in preventing alignment-related failures. It emphasizes the importance of precision in achieving optimal operational conditions. Achieving this relationship is essential in various contexts within mechanical engineering and maintenance practices, particularly in alignment tasks.