What role does the knee play in adjusting the milling cutter?

The knee on a milling machine is a critical component that primarily enables vertical adjustment of the milling cutter. By raising or lowering the knee, the operator can set the depth of cut accurately. This function is essential for achieving the desired machining precision and ensuring that the cutting tool engages the workpiece at the correct depth during the milling process.

Adjusting the knee affects the vertical positioning of the milling head and thereby controls how deep the cutter penetrates into the material. This adjustment is fundamental in milling operations, where depth can significantly influence the quality and characteristics of the finished part.

The other aspects mentioned, such as lateral movement for lateral cuts or holding the machine in place, do not pertain to the knee's primary function. While milling machines utilize other components for different movements and stability, the knee's specific purpose is focused on vertical adjustments.