diameter 450mm x length 10000mm screw conveyor (Polygon mesh 3D model) is available on CGTrader for $75. Original author: rasari35-0cf8ce. Specs: 50 polys, 50 verts.
OTHER (Other, filesize: 21.8 MB), IGE (IGES, filesize: 31.7 MB), X_T (Parasolid, filesize: 10.7 MB)