What device supports and moves the saddle and worktable of a manual milling machine?

The knee is the component of a manual milling machine that supports and moves the saddle and worktable. It is positioned between the column and the worktable, allowing for vertical movement, which is essential for milling operations. The knee can be raised or lowered, thereby adjusting the height of the worktable relative to the milling cutter. This adjustment is crucial for ensuring that the cutter can engage properly with the workpiece being machined.

The column, while integral to the structure of the milling machine, primarily houses the drive mechanism and provides stability but does not directly support the saddle or worktable. The head is the part of the machine that contains the spindle and the tool holder; it is responsible for holding and driving the cutting tools. The bed serves as the base of the machine structure, supporting the entire assembly but does not facilitate the vertical adjustment of the table, making the knee the correct answer for this question.