A device mounted on a milling machine, providing precise rotational control of a workpiece. This allows for operations such as cutting gears, splines, and slots at specific angles or intervals. For example, creating equally spaced holes around a circular component requires this controlled rotation.
This rotational precision enhances the milling machine’s versatility, enabling complex machining operations that would be difficult or impossible otherwise. It contributes to increased accuracy and repeatability, reducing errors and improving the overall quality of manufactured parts. Historically, such precise divisions relied on manual methods, making this device a significant advancement in machining technology.