UniBw hands free door opener cup shape

thingiverse

Hands-free door opening handle to be mounted on regular door handles with a diameter of roughly 20 mm. Works on round and edgy handles. We use it for publicly used doors at the department of mechanical engineering of the Bundeswehr University Munich. Put some rubber underneath to prevent the handle from turning. A cut up piece of old bike tube will work perfectly. Mount the two halfes with four M4x16 or M4x20 bolts and nuts and tighten with care. We printed in Ultimaker ABS without support. PLA should also work. Settings were 20% gyroid infill, about 2 mm wall thickness. Due to the small contact area we had occasional issues with warping, which did not matter on the final part though. Building on a raft might be an option. There is also a model to be mounted on vertical handle bars: https://www.thingiverse.com/thing:4463241 Happy printing! #stopcoronavirus