What component labels the mechanism used to control vertical movement?

The vertical traverse lever is a crucial component in milling machines that specifically controls the vertical movement of the spindle and tooling. This mechanism allows the operator to precisely adjust the height of the cutter or workpiece, which is essential for achieving desired machining depths and ensuring accuracy in milling operations. By utilizing the vertical traverse lever, the machinist can raise or lower the quill smoothly and accurately, making it fundamental for operations such as pocketing, drilling, and contouring.

In contrast, while the quill feed hand lever also contributes to vertical movement, it's primarily responsible for fine adjustments rather than broader movements. The crossfeed handle is intended for horizontal movements across the workpiece, and the table lock secures the table in place, preventing it from moving during machining. Understanding the distinct functions of these components helps clarify the importance of the vertical traverse lever in controlling vertical movements in milling operations.