An Overview of Vertical vs. Horizontal Milling | .
Operation of a Horizontal Milling Machine. In contrast to vertical milling equipment, horizontal milling machines don''t use a fixed spindle. Instead, they employ cutting heads similar to small circular saws that are mounted on a horizontal arbor. In some cases, such as when the arbor stretches across the entire length of the bed, multiple cutters can be installed. While some mills restrict ...