Horizontal Milling, Vertical Milling - What is a Milling Machine?Jan 8, 2010 . A milling machine is categorized as vertical and horizontal. There are many tasks that a milling machine can perform such as shaping, boring,.vertical mill description,Vertical Milling Machine Operating Instructions - Sherline ProductsApr 21, 2016 . Vertical Milling Machine. Operating Instructions. General Description. At first glance, a vertical mill looks similar to a drill press, but there are.