... SHJ-50 co-rotating twin-screw extruder,extruding machine, extrusion machine 1. Feeding system single-screw or twin-screw feeder , horizontal mixing, stainless ... gear lubrication 5. Extrusion system Screw length 28-56, screw diameter 50mm, screw speed 50-500rpm, screw element made of high-quality ... of α101, surface hardness of HRC 60-64 ,screw element and mandrel using the most advanced involute spline ...