50mm Kaufmann/STMP single screw extruder. 20hp dc motor. Fan cooled. Circa 25:1

50mm Kaufmann/STMP single screw extruder. 20hp dc motor. Fan cooled. Circa 25:1Circa 50mm single screw Kaufman/ STMP extruder. Model 78. circa 25:1 ( length of flight on screw 1300mm) electrically heated. 3 zone barrel. Fan cooled. 20hp Dc motor. Integral 6 zone control panel on same frame.