A simple machine consisting essentially of a wheel with a grooved rim in which a pulled rope or chain can run to change the direction of the pull and thereby lift a load.
STL (Stereolithography, filesize: 167 KB), SLDPRT (SolidWorks, filesize: 189 KB), OTHER (Other, filesize: 1.06 MB), IGE (IGES, filesize: 644 KB), DWG (AutoCAD, filesize: 153 KB)