Simplified ( without bearing and housing ) worm gear mechanism with reduction (28/5)^3 = 175.616. Used models Worm gear of member dassault.
STL (Stereolithography, filesize: 16.8 MB), OBJ (OBJ, filesize: 6.01 MB), 3MF (3D Manufacturing File, filesize: 1.55 MB), SLDPRT (SolidWorks, filesize: 5.79 MB)