What do center lines on a print indicate?

Center lines on a print serve a crucial role in defining the relationship and symmetry of various features within a part. When a center line is indicated, it typically signifies the axis around which the shape is balanced or symmetrical. This is particularly important for machining processes, as it helps operators understand where to align tools and workpieces to achieve accuracy during fabrication.

By indicating the middle of a symmetrical part, center lines aid in assuring that features such as holes, grooves, or cuts are evenly distributed and are correctly oriented, enhancing the overall precision of the machining process. This is vital for maintaining tolerances and achieving the desired end result in manufacturing.