double volume internal gear pump 540 powered

further updated version of the internal gear pump.
updates include :
larger pump volume ,
labyrinth input shaft seal ,
threaded coupling housing , and coupling drive .

update of original gear pump files : https://www.thingiverse.com/thing:5389540

I used a 540 motor to power this pump, it can be driven in 2 flavors , direct , or gear reduced . for the gear reduction the files are listed here : https://www.thingiverse.com/thing:6178868

I will be continuing with the thread on coupling design in the future unless I come up with something better . I am also working on a mechanical type seal for the 6mm shaft driven pumps .

you tube video : https://youtu.be/VjPOXdUBRUI