Effect length of screw(mm) 985: 1070: 1200: 1440: 1800: 2500: Main Motor(kw) 15: 18.5: 22/30: 37: 55: 110: Barrel heating power(kw) 12: A unique characteristic of the twin screw extruder machine is that it has two screws inside the barrel. ... There are different types and models of electric motors that depend on the size of your twin screw ...