... steel ,cast iron 3.single head,5-plane proces CNC Boring and milling machine Model PM seriesFeature of this machine1.Taiwan precision main ... realize milling boring and tapping on 5 planes of the work piece3.The machine is composed of work table , crossbeam, column, vertical ram ... of this machine. The work table, cross beam ,column and vertical ram are all cast iron made, all these parts have ...