Mendel Pulley with 3 captive M3 nuts
thingiverse
This design is inspired by nophead's Mendel Pulley featuring a captive M3 nut, but it has been redrawn in OpenSCAD for improved functionality. To enhance grip, additional nuts have been added. This part is incorporated into my OverlapStrap project, licensed under GPLv3. Check out the project at http://www.gilesbathgate.com/OverlapStrap/ or clone it using 'git clone http://www.gilesbathgate.com/OverlapStrap.git'. To work with OpenSCAD, make sure you have a version from svn >= r545 or Release >= openscad-2010.05, as earlier versions had a bug that prevented the resulting STL from being opened.
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